DTC P1604: Startability Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
4. Read DTCs and record the Freeze Frame Data.

   HINT: 

   • This freeze frame data shows the actual engine conditions when engine starting trouble occurred.
   • When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data.
   • The fourth set of freeze frame data is the data recorded when the DTC is stored.
   Fig 1: Identifying Freeze Frame Data

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   RESULT
   
   

   Result	Proceed to
   Only DTC P1604 is output	A
   DTCs other than P1604 are output	B

B → See step   118 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Immobiliser Fuel Cut.
5. Read the value displayed on the Techstream.

   OK

   Immobiliser Fuel Cut is OFF

   HINT: 

   If the engine is cranked immediately after reconnecting the battery cable (key verification for immobiliser system not completed), the engine cannot be started. Key verification needs to wait for several seconds after turning the ignition switch to ON.

NG → See step   149 

OK: Go to next step 

1. Confirm the problem symptoms.
   RESULT
   
   

   Result	Proceed to
   Freeze frame data exists, but the starting difficulty cannot be reproduced and it is unknown what kind of starting difficulty occurred	A
   The problem symptoms can be reproduced, or the malfunction conditions are known	B

B → See step   26 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA .
   RESULT
   
   

   Freeze Frame Data Item		Suspected Area	Proceed to
   Engine Speed	Battery Voltage
   All 5 sets of freeze frame data are 0 rpm (no engine cranking at all)	Minimum voltage is less than 5 V	Battery fully depleted	A
   	Minimum voltage is 5 V or higher	Starter malfunction Crankshaft position sensor system Excess engine friction ECM	B
   60 to 250 rpm (engine cranks but no initial combustion)	-	Fuel pump control system Ignition system Engine coolant temperature sensor Fuel injection system	C
   250 rpm or higher (combustion occurs but initial combustion and starter turnoff occur late)	-	Engine assembly Fuel injection system Fuel pump control system	D

   RESULT
   
   

   Freeze Frame Data Item	Suspected Area	Proceed to
   Low Rev for Eng Start
   ON exists	Intake system connections Throttle with motor body assembly Camshaft timing oil control valve assembly Mass air flow meter	E

   HINT: 

   When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E.

   *1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine.

   *2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items.

   • Immobiliser Fuel Cut
   • Engine Speed (Starter Off)
   • Shift SW Status (R, D Range)

B → See step   5 

C → See step   11 

D → See step   16 

E → See step   52 

A → CHARGE OR REPLACE BATTERY 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA .
   RESULT
   
   

   Freeze Frame Data Item	Result	Suspected Area	Proceed to
   Battery Voltage	Minimum voltage is 6 V or higher and voltage does not fluctuate*1	Starter system	A
   	Minimum voltage is 6 V or higher and voltage fluctuates*2, *3	Crankshaft position sensor system ECM	B
   	Minimum voltage is 5 to 6 V*4	Excess engine friction Battery fully depleted	C

   HINT: 

   • *1: The 5 sets of freeze frame data show approximately the same battery voltage.
     Fig 2: Identifying Freeze Frame Data

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • *2: The 5 sets of freeze frame data show different battery voltages.
   • *3: If the voltage fluctuates, it can be determined that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor system and/or the ECM may be malfunctioning.
   • *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.
   • Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

B → See step   6 

C → CHECK AND REPAIR ENGINE OR BATTERY 

A → See step   119 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

NG → See step   120 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Check for oil on the connector terminals.

   OK

   No oil on the terminals.

NG → See step   121 

OK: Go to next step 

1. Inspect the crankshaft position sensor. Refer to INSPECTION .

NG → See step   121 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B29-1 - B47-6 (NE+)	Always	Below 1 Ω
   B29-2 - B47-5 (NE-)	Always	Below 1 Ω
   B29-1 or B47-6 (NE+) - Body ground	Always	10 kΩ or higher
   B29-2 or B47-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA .
   RESULT
   
   

   Freeze Frame Data Item			Suspected Area	Proceed to
   Coolant Temp, Intake Air	Coolant Temp	Fuel Pump Duty*3 Fuel Pump/Speed Status*4
   Difference between Coolant Temp and Intake Air is 10°C or higher*1	Coolant Temp is 125°C or more, or lower than outside temperature by 15°C or more	-	Engine coolant temperature sensor	A
   	Other than above	No sets of freeze frame data are 0%*3 All 5 sets of freeze frame data are ON*4	-	B
   		At least 1 of the 5 sets of freeze frame data is 0%*3 At least 1 of the 5 sets of freeze frame data is OFF*4	Fuel pump control system	C
   Difference between Coolant Temp and Intake Air is less than 10°C *2	-	At least 1 of the 5 sets of freeze frame data is 0%*3 At least 1 of the 5 sets of freeze frame data is OFF*4	Fuel pump control system
   		No sets of freeze frame data are 0%*3 All 5 sets of freeze frame data are ON*4	-	B

   HINT: 

   • *1: A long time had not elapsed after stopping the engine.
   • *2: A long time had elapsed after stopping the engine.
   • *3: w/ Secondary Air Injection System
   • *4: w/o Secondary Air Injection System
   • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Refer to INITIALIZATION .

B → See step   12 

C → See step   122 

A → See step   135 

1. w/ Secondary Air Injection System:
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   5. When performing the Active Test, check for an operating sound from the fuel pump.

      OK

      Control the Fuel Pump / Speed	Specified Condition
      ON	Operating sound heard
      OFF	Operating sound not heard

      HINT: 

      Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

2. w/o Secondary Air Injection System:
   1. Connect the Techstream to the DLC3.
      Fig 3: Identifying L5 Fuel Pump Harness Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the fuel pump connector.
   3. Turn the ignition switch to ON.
   4. Turn the Techstream on.
   5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      L5-4 - Body ground	Active Test is being performed	11 to 14 V

      TEXT IN ILLUSTRATION
      
      

      *a	Front view of wire harness connector (to Fuel Pump)

      HINT: 

      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      • Make sure there is not an excessive amount of force applied to the wire harness.

NG → See step   122 

OK: Go to next step 

Fig 4: Identifying Fuel Injector Assembly Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel injector assembly connectors.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B11-1 - Body ground	Ignition switch ON	11 to 14 V
   B25-1 - Body ground	Ignition switch ON	11 to 14 V
   B10-1 - Body ground	Ignition switch ON	11 to 14 V
   B21-1 - Body ground	Ignition switch ON	11 to 14 V
   B9-1 - Body ground	Ignition switch ON	11 to 14 V
   B18-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Injector Assembly)

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → See step   146 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   15 

A → REPAIR OR REPLACE FUEL LINE 

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   RESULT
   
   

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B → See step   25 

A → REPAIR OR REPLACE FUEL SYSTEM 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA .
   RESULT
   
   

   Freeze Frame Data Item				Suspected Area	Proceed to
   Coolant Temp, Intake Air	Coolant Temp	Long FT	Engine Speed
   Difference between Coolant Temp and Intake Air is 10°C or more	Coolant Temp is 125°C or more, or lower than outside temperature*1 by 15°C or more	-	-	Engine coolant temperature sensor	A
   	Other than above	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector assembly	B
   		-15 to +15%	Minimum speed is 300 rpm or more*2	Engine assembly	C
   			Minimum speed is below 300 rpm	Fuel system Intake air system	D
   Difference between Coolant Temp and Intake Air is less than 10°C	-	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector assembly	B
   		-15 to +15%	Minimum speed is 300 rpm or more*2	Engine assembly	C
   			Minimum speed is below 300 rpm	Fuel system Intake air system	D

   HINT: 

   • *1: Use an actual outside temperature estimated from the Initial Intake Air, Ambient Temp for A/C, and (if possible) the weather when the DTC was detected.
   • *2: Compression loss may have occurred in the engine assembly.
   • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor or engine assembly. Refer to INITIALIZATION .

B → See step   17 

C → CHECK AND REPAIR ENGINE ASSEMBLY 

D → See step   19 

A → See step   135 

1. Check that no carbon is stuck to the fuel injector assembly.

   OK

   No carbon present.

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

NG → See step   123 

OK: Go to next step 

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   RESULT
   
   

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B → See step   25 

A → REPAIR OR REPLACE FUEL SYSTEM 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to FREEZE FRAME DATA .
   RESULT
   
   

   Freeze Frame Data Item	Result	Suspected Area	Proceed to
   Coolant Temp	Engine coolant temperature is 40°C or less*1	Pressure regulator	A
   	Engine coolant temperature is 40 to 90°C*2	Fuel injector assembly	B
   	Engine coolant temperature is 90°C or more*3	Pressure regulator	A

   HINT: 

   *1: If the engine coolant temperature is 40°C (104°F) or less (after stopping the engine and the vehicle is not driven for a long period of time), the pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: If the engine coolant temperature is 40 to 90°C (104 to 194°F) (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from a fuel injector assembly.

   *3: If the engine coolant temperature is 90°C (194°F) or more (2 to 5 minutes have passed after stopping the engine), there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

B → See step   21 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures. Refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

   Standard

   147 kPa (1.5 kgf/cm² ) or higher (5 minutes after stopping the engine)

   HINT: 

   If the engine cannot be started, read the values after cranking the engine.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   25 

A → See step   145 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   RESULT
   
   

   Result	Proceed to
   4000 ppm or higher	A
   Less than 4000 ppm	B

   HINT: 

   If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.

B → See step   23 

A: Go to next step 

1. Inspect the fuel injector assemblies. Refer to INSPECTION .
   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   23 

A → See step   123 

1. Check if carbon is in the air flow passage.
   RESULT
   
   

   Result	Proceed to
   Carbon in passage	A
   No carbon present	B

   HINT: 

   Perform "Inspection After Repair" after cleaning or replacing the throttle with motor body assembly. Refer to INITIALIZATION .

B → See step   24 

A → See step   124 

1. Check the intake system for vacuum leak. Refer to ON-VEHICLE INSPECTION .

   OK

   No leak in intake system.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the intake system. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Check if the engine can be started.
   RESULT
   
   

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B → See step   26 

A → END 

1. Confirm the problem symptoms.

   HINT: 

   The problem symptoms below can be determined by reading the freeze frame data.

   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   The engine does not crank	Battery fully depleted Starter (includes pinion gear wear or tooth damage) Starter system Engine assembly (excess friction) Drive plate wear or tooth damage*1 Flywheel wear or tooth damage*2	A
   Abnormal cranking speed	Battery fully depleted Starter Engine assembly (excess friction, compression loss)	B
   There is no initial combustion (combustion does not occur even once)*1	Pressure regulator fuel pressure maintenance Fuel injector assembly leak Fuel leak from fuel line Fuel pump control system Fuel pump Spark plug Crankshaft position sensor system Ignition coil system	C
   The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2	Intake system connections Throttle with motor body assembly Camshaft timing oil control valve assembly Mass air flow meter system	D
   The initial combustion and starter turnoff occur late*3	Engine coolant temperature sensor Mass air flow meter Air fuel ratio sensor Fuel injector assembly Spark plug Pressure regulator Fuel pump assembly Fuel pump control system	E

   • *1: for Automatic Transmission Models
   • *2: for Manual Transmission Models

   HINT: 

   • If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning.
   • *1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning.
   • *2: If the engine stalls after starter turnoff, the air-fuel ratio may be incorrect or the camshaft timing oil control valve assembly may have a problem returning.
   • *3: If the initial combustion and starter turnoff occur late, the fuel injection volume may be incorrect (too low or too high).

B → See step   33 

C → See step   36 

D → See step   52 

E → See step   59 

A: Go to next step 

1. When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely.*1	Battery Excess engine friction Starter	A
   A noise indicating that the starter pinion gear is extending is heard but the starter pinion gear is spinning freely.	Drive plate and ring gear sub-assembly*2 Flywheel sub-assembly*3 Starter	B
   A noise indicating that the starter pinion gear is extending is not heard	Battery Starter Starter system	C

   HINT: 

   *1: The battery may be fully depleted or there may be excess engine friction.

   *2: for Automatic Transmission Models

   *3: for Manual Transmission Models

B → See step   30 

C → See step   31 

A: Go to next step 

1. Inspect the battery. Refer to ON-VEHICLE INSPECTION .

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Check that the crankshaft rotates smoothly when rotating it by hand.

   OK

   Crankshaft rotates smoothly.

   HINT: 

   • Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.
   • Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → See step   125 

1. Remove the starter. Refer to REMOVAL .
2. Check for starter pinion gear wear and damage.

   OK

   There is no wear or damage.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK (for manual transmission models)	B
   OK (for automatic transmission models)	C

B → See step   148 

C → See step   126 

A → See step   127 

1. Inspect the battery. Refer to ON-VEHICLE INSPECTION .

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Inspect the starter. Refer to INSPECTION .

NG → See step   127 

OK → See step   128 

1. Check the cranking speed.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   Cranking speed is slow (100 rpm or less)	Battery Starter Excess engine friction	A
   Cranking speed is fast (300 rpm or more)*1	Engine compression loss	B

   HINT: 

   • *1: If the cranking speed is fast, there may be compression loss.
   • Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

B → CHECK AND REPAIR ENGINE ASSEMBLY 

A: Go to next step 

1. Inspect the battery. Refer to ON-VEHICLE INSPECTION .

NG → CHARGE OR REPLACE BATTERY 

OK: Go to next step 

1. Check that the crankshaft rotates smoothly when rotating it by hand.

   OK

   Crankshaft rotates smoothly.

   HINT: 

   • Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.
   • Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → See step   125 

1. Using a sound scope or screwdriver, check for an injector operating noise while cranking the engine.

   OK

   Fuel injector assembly operating noise is heard.

NG → See step   49 

OK: Go to next step 

1. Check the fuel pressure. Refer to ON-VEHICLE INSPECTION - Step 2 .

NG → See step   47 

OK: Go to next step 

1. Inspect for sparks. Refer to ON-VEHICLE INSPECTION .

NG → See step   42 

OK: Go to next step 

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector assembly leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT: 

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from a fuel injector assembly.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 73, perform fuel system troubleshooting C (steps 74 to 78).

B → See step   41 

C → See step   73 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures. Refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   RESULT
   
   

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	B*1

   HINT: 

   • If the engine cannot be started, check the fuel pressure after cranking the engine.
   • *1: From step 73, perform fuel system troubleshooting C (steps 74 to 78).

B → See step   73 

A → See step   145 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   RESULT
   
   

   Result	Proceed to
   4000 ppm or higher	A
   Less than 4000 ppm	B*1

   HINT: 

   • If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.
   • *1: From step 73, perform fuel system troubleshooting C (steps 74 to 78).
   • Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   73 

A → See step   123 

1. Inspect the spark plugs. Refer to ON-VEHICLE INSPECTION - Step 2 .

   HINT: 

   • Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders.
   • Perform "Inspection After Repair" after replacing the spark plug. Refer to INITIALIZATION .

NG → See step   129 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the [Engine Speed] value.

   OK

   A value that matches the actual engine speed is constantly output.

   HINT: 

   • Check the engine speed using a line graph.
   • If the engine cannot be started, check the engine speed while cranking the engine.
   • If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.

NG → See step   130 

OK: Go to next step 

Fig 5: Checking Harness And Connector (Ignition Coil Assembly Power Source)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the ignition coil assembly connectors.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B7-1 (+B) - B7-4 (GND)	Ignition switch ON	11 to 14 V
   B24-1 (+B) - B24-4 (GND)	Ignition switch ON	11 to 14 V
   B6-1 (+B) - B6-4 (GND)	Ignition switch ON	11 to 14 V
   B23-1 (+B) - B23-4 (GND)	Ignition switch ON	11 to 14 V
   B5-1 (+B) - B5-4 (GND)	Ignition switch ON	11 to 14 V
   B20-1 (+B) - B20-4 (GND)	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Ignition Coil Assembly)

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → See step   131 

OK: Go to next step 

1. Disconnect the B7, B24, B6, B23, B5, and B20 ignition coil assembly connectors.
2. Disconnect the B49 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B7-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B24-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B6-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B23-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B5-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B20-2 (IGF) - B49-6 (IGF1)	Always	Below 1 Ω
   B7-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B24-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B6-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B23-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B5-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher
   B20-2 (IGF) or B49-6 (IGF1) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B7, B24, B6, B23, B5, and B20 ignition coil assembly connectors.
2. Disconnect the B49 and B48 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B7-3 (IGT1) - B49-24 (IGT1)	Always	Below 1 Ω
   B24-3 (IGT2) - B49-25 (IGT2)	Always	Below 1 Ω
   B6-3 (IGT3) - B49-26 (IGT3)	Always	Below 1 Ω
   B23-3 (IGT4) - B49-27 (IGT4)	Always	Below 1 Ω
   B5-3 (IGT5) - B49-28 (IGT5)	Always	Below 1 Ω
   B20-3 (IGT6) - B48-25 (IGT6)	Always	Below 1 Ω
   B7-3 (IGT1) or B49-24 (IGT1) - Body ground	Always	10 kΩ or higher
   B24-3 (IGT2) or B49-25 (IGT2) - Body ground	Always	10 kΩ or higher
   B6-3 (IGT3) or B49-26 (IGT3) - Body ground	Always	10 kΩ or higher
   B23-3 (IGT4) or B49-27 (IGT4) - Body ground	Always	10 kΩ or higher
   B5-3 (IGT5) or B49-28 (IGT5) - Body ground	Always	10 kΩ or higher
   B20-3 (IGT6) or B48-25 (IGT6) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness is normal, after replacing the ignition coil assembly, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform troubleshooting for the ignition system (steps 79 to 85).
   • Perform "Inspection After Repair" after replacing the ignition coil assembly. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   132 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for an operating sound from the fuel pump.

   OK

   Control the Fuel Pump / Speed	Specified Condition
   ON	Operating sound heard
   OFF	Operating sound not heard

   HINT: 

   Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

NG → See step   122 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
   • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform fuel system troubleshooting (steps 74 to 78).

B → See step   122 

A → REPAIR OR REPLACE FUEL LINE 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the [Engine Speed] value.

   OK

   A value that matches the actual engine speed is constantly output.

   HINT: 

   • Check the engine speed using a line graph.
   • If the engine cannot be started, check the engine speed while cranking the engine.
   • If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.

NG → See step   121 

OK: Go to next step 

Fig 6: Identifying Fuel Injector Assembly Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel injector assembly connectors.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B11-1 - Body ground	Ignition switch ON	11 to 14 V
   B25-1 - Body ground	Ignition switch ON	11 to 14 V
   B10-1 - Body ground	Ignition switch ON	11 to 14 V
   B21-1 - Body ground	Ignition switch ON	11 to 14 V
   B9-1 - Body ground	Ignition switch ON	11 to 14 V
   B18-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Injector Assembly)

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → See step   146 

OK: Go to next step 

1. Disconnect the B11, B25, B10, B21, B9 and B18 fuel injector assembly connectors.
2. Disconnect the B50 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B11-2 - B50-6 (#10)	Always	Below 1 Ω
   B25-2 - B50-1 (#20)	Always	Below 1 Ω
   B10-2 - B50-7 (#30)	Always	Below 1 Ω
   B21-2 - B50-2 (#40)	Always	Below 1 Ω
   B9-2 - B50-8 (#50)	Always	Below 1 Ω
   B18-2 - B50-3 (#60)	Always	Below 1 Ω
   B11-2 or B50-6 (#10) - Body ground	Always	10 kΩ or higher
   B25-2 or B50-1 (#20) - Body ground	Always	10 kΩ or higher
   B10-2 or B50-7 (#30) - Body ground	Always	10 kΩ or higher
   B21-2 or B50-2 (#40) - Body ground	Always	10 kΩ or higher
   B9-2 or B50-8 (#50) - Body ground	Always	10 kΩ or higher
   B18-2 - B50-3 (#60) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   140 

1. Inspect the mass air flow meter. Refer to PROCEDURE - Step 6 .

NG → See step   58 

OK: Go to next step 

1. Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.]. Refer to ON-VEHICLE INSPECTION .

   HINT: 

   • If the accelerator pedal is released after revving the engine, the inspection is easier to perform because the vacuum inside the intake manifold increases and the air suction noise becomes louder.
   • If Short FT #1, Short FT #2, Long FT #1 and Long FT #2 are largely different from the normal values (differ by more than 15%) when idling (intake air volume is small) and almost the same as the normal values when revving the engine (for example, when maintaining a speed of 3000 rpm) (intake air volume is high), air leakage may be present.

   OK

   There is no air leakage.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the intake system. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE INTAKE SYSTEM 

OK: Go to next step 

1. Disconnect the B14 throttle with motor body assembly connector.

   HINT: 

   When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 4 to 7°.

2. Crank the engine and check that it starts.
   RESULT
   
   

   Result	Proceed to
   Engine starts	A
   Engine does not start	B

   HINT: 

   When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs. Refer to DTC CHECK / CLEAR .

B → See step   56 

A: Go to next step 

1. Check if carbon is in the air flow passage.

   OK

   No carbon present.

   HINT: 

   Perform "Inspection After Repair" after cleaning the throttle with motor body assembly. Refer to INITIALIZATION .

NG → REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY 

OK: Go to next step 

1. Perform the Active Test, referring to DTC P0011 inspection procedure. Refer to PROCEDURE - Step 2 .

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
   • If the camshaft timing oil control valve assembly is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause the engine to stall.

NG → See step   134 

OK: Go to next step 

1. Perform the Active Test, referring to DTC P0014 inspection procedure. Refer to PROCEDURE - Step 2 .
   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B*1

   HINT: 

   • *1: From step 73, perform intake system troubleshooting (steps 86 to 88). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 89 to 96).
   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
   • If the camshaft timing oil control valve assembly is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause the engine to stall.

B → See step   73 

A → See step   147 

1. Disconnect the B51 mass air flow meter connector.
2. Disconnect the B48 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B51-5 (VG) - B48-14 (VG)	Always	Below 1 Ω
   B51-4 (E2G) - B48-13 (E2G)	Always	Below 1 Ω
   B51-5 (VG) or B48-14 (VG) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness is normal, after replacing the mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform intake system troubleshooting (steps 86 to 88). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 89 to 96).
   • Perform "Inspection After Repair" after replacing the mass air flow meter. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   136 

1. Inspect the engine coolant temperature sensor. Refer to INSPECTION .

   HINT: 

   • If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Refer to INITIALIZATION .

NG → See step   135 

OK: Go to next step 

1. Disconnect the B52 engine coolant temperature sensor connector.
2. Disconnect the B49 and B48 ECM connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B52-2 - B49-17 (THW)	Always	Below 1 Ω
   B52-1 - B48-8 (ETHW)	Always	Below 1 Ω
   B52-2 or B49-17 (THW) - Body ground	Always	10 kΩ or higher
   B52-1 or B48-8 (ETHW) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the mass air flow meter. Refer to PROCEDURE - Step 6 .

   HINT: 

   • If the mass air flow meter is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • Perform "Inspection After Repair" after replacing the mass air flow meter. Refer to INITIALIZATION .

NG → See step   136 

OK: Go to next step 

1. Disconnect the B51 mass air flow meter connector.
2. Disconnect the B48 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B51-5 (VG) - B48-14 (VG)	Always	Below 1 Ω
   B51-4 (E2G) - B48-13 (E2G)	Always	Below 1 Ω
   B51-5 (VG) or B48-14 (VG) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.
   • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1, Long FT #2 and Atmosphere Pressure.
   RESULT
   
   

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1 Long FT #2	+25% or more or less than -25%	Air fuel ratio sensor Mass air flow meter Fuel injector assembly ECM	A
   Atmosphere Pressure	80 kPa or less (when altitude is 0 m)
   Both Data List items listed above	Values are other than above	-	B

B → See step   67 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Utility / Learning Value Reset.
5. Confirm the following conditions as instructed on the screen.
   • - Ignition switch ON
   • - Engine stopped
   • - Battery voltage 9 V or higher
6. After confirming, select "Next" and initialize the learn value.
7. After the Techstream display indicates that the learning value reset is complete, turn the ignition switch off and wait for 5 seconds or more.
   NOTE:

   If a massage indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.

8. Check if the engine can be started.
   RESULT
   
   

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B → See step   67 

A: Go to next step 

Fig 7: Identifying Injection Volume, A/F & HO2 Output Voltage Graphs

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel System Status #1 and Fuel System Status #2.
5. Confirm that Fuel System Status #1 and Fuel System Status #2 are both CL.
6. Enter the following menus: Powertrain / Engine and ECT / Data List / AF Lambda B1S1.
7. Confirm that AF Lambda B1S1 are both within the range of 0.95 to 1.05 when idling.
8. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
9. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

   Standard Voltage

   Tester Display	Injection Volume	Specified Condition
   AFS Voltage B1S1 AFS Voltage B2S1	12.5%	Air fuel ratio sensor output voltage is below 3.1 V
   	-12.5%	Air fuel ratio sensor output voltage is higher than 3.4 V

   HINT: 

   • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
   • If the air fuel ratio sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • Perform "Inspection After Repair" after replacing the air fuel ratio sensor. Refer to INITIALIZATION .

NG → See step   137 

OK: Go to next step 

1. Check if the idling speed is stable after starting the engine.

   OK

   Speed is stable.

   HINT: 

   • After replacing the fuel injector assembly or mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • Perform "Inspection After Repair" after replacing the mass air flow meter or fuel injector assembly. Refer to INITIALIZATION .

NG → See step   123 

OK → See step   136 

1. Check the fuel pressure. Refer to ON-VEHICLE INSPECTION - Step 2 .

NG → See step   72 

OK: Go to next step 

1. Inspect the spark plugs. Refer to ON-VEHICLE INSPECTION - Step 2 .
   RESULT
   
   

   Result	Proceed to
   All cylinders are normal	A
   One cylinder is abnormal*1	B
   All cylinders are abnormal*2, *3	C

   HINT: 

   • *1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • *2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • *3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly.
   • Perform "Inspection After Repair" after replacing the spark plug. Refer to INITIALIZATION .

B → See step   138 

C → See step   139 

A: Go to next step 

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector assembly leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT: 

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from a fuel injector assembly.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 73, perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.

B → See step   71 

C → See step   73 

A: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures. Refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   RESULT
   
   

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	B*1

   HINT: 

   • If the engine cannot be started, check the fuel pressure after cranking the engine.
   • *1: From step 73, perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.

B → See step   73 

A → See step   145 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   RESULT
   
   

   Result	Proceed to
   4000 ppm or higher	A
   Less than 4000 ppm	B*1

   HINT: 

   • If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.
   • *1: From step 73, perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   • Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   73 

A → See step   123 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
   • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.

B → See step   133 

A → REPAIR OR REPLACE FUEL LINE 

1. If the malfunction could not be identified during the inspection in steps 39, 40, 41 and 48, perform fuel system troubleshooting C (steps 74 to 78).
   RESULT
   
   

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 39, 40, 41 and 48	Fuel system troubleshooting C	74 to 78	A

2. If the malfunction could not be identified during the inspection in step 46, perform ignition system troubleshooting (steps 79 to 85).
   RESULT
   
   

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 46	Ignition system troubleshooting	79 to 85	B

3. If the malfunction could not be identified during the inspection in steps 56, 57 and 58, perform intake air system troubleshooting (steps 86 to 88). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 89 to 96).
   RESULT
   
   

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 56, 57, 58	Intake air system troubleshooting	86 to 88	C
   	Fuel system troubleshooting A	89 to 96

4. If the malfunction could not be identified during the inspection in steps 59, 60, 61, 62, 65, 66, 68, 69, 70, 71 and 72, perform fuel system troubleshooting A (steps 97 to 104), fuel system troubleshooting B (steps 105 to 107), intake air system troubleshooting (steps 108 to 110), and ignition system troubleshooting (steps 111 to 117), in that order.
   RESULT
   
   

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 59, 60, 61, 62, 65, 66, 68, 69, 70, 71 and 72	Fuel system troubleshooting A	97 to 104	D
   	Fuel system troubleshooting B	105 to 107
   	Intake air system troubleshooting	108 to 110
   	Ignition system troubleshooting	111 to 117

B → See step   79 

C → See step   86 

D → See step   97 

A: Go to next step 

1. Inspect the fuel injector assembly. Refer to INSPECTION .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

NG → See step   123 

OK: Go to next step 

Fig 8: Identifying Fuel Injector Assembly Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel injector assembly connectors.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B11-1 - Body ground	Ignition switch ON	11 to 14 V
   B25-1 - Body ground	Ignition switch ON	11 to 14 V
   B10-1 - Body ground	Ignition switch ON	11 to 14 V
   B21-1 - Body ground	Ignition switch ON	11 to 14 V
   B9-1 - Body ground	Ignition switch ON	11 to 14 V
   B18-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Injector Assembly)

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → See step   150 

OK: Go to next step 

1. Disconnect the B11, B25, B10, B21, B9 and B18 fuel injector assembly connectors.
2. Disconnect the B50 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B11-2 - B50-6 (#10)	Always	Below 1 Ω
   B25-2 - B50-1 (#20)	Always	Below 1 Ω
   B10-2 - B50-7 (#30)	Always	Below 1 Ω
   B21-2 - B50-2 (#40)	Always	Below 1 Ω
   B9-2 - B50-8 (#50)	Always	Below 1 Ω
   B18-2 - B50-3 (#60)	Always	Below 1 Ω
   B11-2 or B50-6 (#10) - Body ground	Always	10 kΩ or higher
   B25-2 or B50-1 (#20) - Body ground	Always	10 kΩ or higher
   B10-2 or B50-7 (#30) - Body ground	Always	10 kΩ or higher
   B21-2 or B50-2 (#40) - Body ground	Always	10 kΩ or higher
   B9-2 or B50-8 (#50) - Body ground	Always	10 kΩ or higher
   B18-2 - B50-3 (#60) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   78 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Replace the VVT sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (VVT SENSOR IS DEFECTIVE) 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   120 

OK: Go to next step 

1. Check the tightening and installation condition of the VVT sensor bolt.
2. Check the connection of the VVT sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   141 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B29-1 - B47-6 (NE+)	Always	Below 1 Ω
   B29-2 - B47-5 (NE-)	Always	Below 1 Ω
   B29-1 or B47-6 (NE+) - Body ground	Always	10 kΩ or higher
   B29-2 or B47-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B15 and B27 VVT sensor (for intake side) connectors.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B15-1 (VVR+) - B47-9 (VV1+)	Always	Below 1 Ω
   B15-2 (VVR-) - B47-10 (VV1-)	Always	Below 1 Ω
   B15-3 (VC) - B47-15 (VCV1)	Always	Below 1 Ω
   B27-1 (VVL+) - B47-12 (VV2+)	Always	Below 1 Ω
   B27-2 (VVL-) - B47-11 (VV2-)	Always	Below 1 Ω
   B27-3 (VC) - B47-16 (VCV2)	Always	Below 1 Ω
   B15-1 (VVR+) or B47-9 (VV1+) - Body ground	Always	10 kΩ or higher
   B15-2 (VVR-) or B47-10 (VV1-) - Body ground	Always	10 kΩ or higher
   B15-3 (VC) or B47-15 (VCV1) - Body ground	Always	10 kΩ or higher
   B27-1 (VVL+) or B47-12 (VV2+) - Body ground	Always	10 kΩ or higher
   B27-2 (VVL-) or B47-11 (VV2-) - Body ground	Always	10 kΩ or higher
   B27-3 (VC) or B47-16 (VCV2) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B57 and B58 VVT sensor (for exhaust side) connectors.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B57-1 (EX+) - B47-13 (EV1+)	Always	Below 1 Ω
   B57-2 (EX-) - B47-14 (EV1-)	Always	Below 1 Ω
   B57-3 (VC2) - B47-15 (VCV1)	Always	Below 1 Ω
   B58-1 (EX+) - B47-18 (EV2+)	Always	Below 1 Ω
   B58-2 (EX-) - B47-17 (EV2-)	Always	Below 1 Ω
   B58-3 (VC2) - B47-16 (VCV2)	Always	Below 1 Ω
   B57-1 (EX+) or B47-13 (EV1+) - Body ground	Always	10 kΩ or higher
   B57-2 (EX-) or B47-14 (EV1-) - Body ground	Always	10 kΩ or higher
   B57-3 (VC2) or B47-15 (VCV1) - Body ground	Always	10 kΩ or higher
   B58-1 (EX+) or B47-18 (EV2+) - Body ground	Always	10 kΩ or higher
   B58-2 (EX-) or B47-17 (EV2-) - Body ground	Always	10 kΩ or higher
   B58-3 (VC2) or B47-16 (VCV2) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   85 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Replace the VVT sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (VVT SENSOR IS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value.
5. Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches turned off.
   RESULT
   
   

   Data List Item	Result	Suspected Area	Proceed to
   ISC Learning Value	(engine displacement (liters) x 0.9) or more	Valve timing Compression	A
   	Less than (engine displacement (liters) x 0.9)	-	B

B → See step   88 

A: Go to next step 

1. Check the compression. Refer to ON-VEHICLE INSPECTION - Step 3 .

   HINT: 

   Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → See step   142 

1. Inspect the engine coolant temperature sensor. Refer to INSPECTION .

   HINT: 

   Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Refer to INITIALIZATION .

NG → See step   135 

OK: Go to next step 

HINT: 

For the fuel pressure inspection, refer to the following procedures. Refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.
   RESULT
   
   

   Vehicle State	Specified Condition
   Cranking engine	304 to 343 kPa (3.1 to 3.5 kgf/cm2 )
   5 minutes after stopping engine	147 kPa (1.5 kgf/cm2 ) or more

NG → See step   95 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1 and Long FT #2.
   RESULT
   
   

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1 Long FT #2	-15 to +15%	Wire harness or connector Fuel	A
   	+15% or more, or less than -15%	Fuel injector assembly	B

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   123 

A: Go to next step 

1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   Current unstable idling speed or history of unstable idling speed	Crankshaft position sensor system	A
   All current and past idling speeds are stable	Fuel	B

   HINT: 

   Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

B → REPLACE FUEL 

A: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   120 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B29-1 - B47-6 (NE+)	Always	Below 1 Ω
   B29-2 - B47-5 (NE-)	Always	Below 1 Ω
   B29-1 or B47-6 (NE+) - Body ground	Always	10 kΩ or higher
   B29-2 or B47-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   96 

A → REPAIR OR REPLACE FUEL LINE 

1. Disconnect the L5 fuel pump connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 9: Identifying L5 Fuel Pump Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (+) - 5 (-)	20°C (68°F)	0.2 to 3.0 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Fuel Pump)

   HINT: 

   • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
   • Make sure the internal connector is securely connected.
   • Make sure the fuel pump filter is not clogged.
   • Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION .

NG → See step   143 

OK → See step   145 

HINT: 

For the fuel pressure inspection, refer to the following procedures. Refer to ON-VEHICLE INSPECTION - Step 2 .

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   RESULT
   
   

   Result	Proceed to
   147 kPa (1.5 kgf/cm2 ) or higher (5 minutes after stopping the engine)	A
   Less than 147 kPa (1.5 kgf/cm2 ) (5 minutes after stopping the engine)	B

B → See step   103 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1 and Long FT #2.
   RESULT
   
   

   Data List Item	Result	Suspected Area	Proceed to
   Long FT #1 Long FT #2	-15 to +15%	Wire harness or connector Fuel	A
   	+15% or more, or less than -15%	Fuel injector assembly	B

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   123 

A: Go to next step 

1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.
   RESULT
   
   

   Problem Symptom	Suspected Area	Proceed to
   Current unstable idling speed or history of unstable idling speed	Crankshaft position sensor system	A
   All current and past idling speeds are stable	Fuel	B

   HINT: 

   Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

B → REPLACE FUEL 

A: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   120 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B29-1 - B47-6 (NE+)	Always	Below 1 Ω
   B29-2 - B47-5 (NE-)	Always	Below 1 Ω
   B29-1 or B47-6 (NE+) - Body ground	Always	10 kΩ or higher
   B29-2 or B47-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   RESULT
   
   

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
   • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B → See step   104 

A → REPAIR OR REPLACE FUEL LINE 

1. Disconnect the L5 fuel pump connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 10: Identifying L5 Fuel Pump Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (+) - 5 (-)	20°C (68°F)	0.2 to 3.0 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Fuel Pump)

   HINT: 

   • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
   • Make sure the internal connector is securely connected.
   • Make sure the fuel pump filter is not clogged.
   • Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION .

NG → See step   143 

OK: Go to next step 

1. Disconnect the vacuum hose (on the canister side) of the purge VSV.
   Fig 11: Inspecting Purge VSV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Start the engine.
3. Idle the engine.
4. Disconnect the B53 connector of the purge VSV.
5. Check if air flows through the purge VSV.

   OK

   Air does not flow

   HINT: 

   When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs. Refer to DTC CHECK / CLEAR .

NG → See step   144 

OK: Go to next step 

1. Clean the inside of the surge tank with compressed air.
2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   RESULT
   
   

   Result	Proceed to
   4000 ppm or higher	A
   Less than 4000 ppm	B

   HINT: 

   • If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.
   • Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION .

B → See step   107 

A → See step   123 

1. Check if carbon is on the intake valves.
   RESULT
   
   

   Result	Proceed to
   Carbon present	A
   No carbon present	B

B → See step   108 

A → CLEAN INTAKE VALVE 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value.
5. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
   RESULT
   
   

   Data List Item	Result	Suspected Area	Proceed to
   ISC Learning Value	(engine displacement (liters) x 0.9) or more	Valve timing Compression	A
   	Less than (engine displacement (liters) x 0.9)	-	B

B → See step   110 

A: Go to next step 

1. Check the compression. Refer to ON-VEHICLE INSPECTION - Step 3 .

   HINT: 

   Perform "Inspection After Repair" after replacing the engine assembly. Refer to INITIALIZATION .

NG → REPAIR OR REPLACE ENGINE ASSEMBLY 

OK → See step   142 

1. Inspect the engine coolant temperature sensor. Refer to INSPECTION .

   HINT: 

   Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Refer to INITIALIZATION .

NG → See step   135 

OK: Go to next step 

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   120 

OK: Go to next step 

1. Check the tightening and installation condition of the VVT sensor bolt.
2. Check the connection of the VVT sensor connector.

   OK

   Sensor is installed correctly.

NG → See step   141 

OK: Go to next step 

1. Disconnect the B29 crankshaft position sensor connector.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B29-1 - B47-6 (NE+)	Always	Below 1 Ω
   B29-2 - B47-5 (NE-)	Always	Below 1 Ω
   B29-1 or B47-6 (NE+) - Body ground	Always	10 kΩ or higher
   B29-2 or B47-5 (NE-) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B15 and B27 VVT sensor (for intake side) connectors.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B15-1 (VVR+) - B47-9 (VV1+)	Always	Below 1 Ω
   B15-2 (VVR-) - B47-10 (VV1-)	Always	Below 1 Ω
   B15-3 (VC) - B47-15 (VCV1)	Always	Below 1 Ω
   B27-1 (VVL+) - B47-12 (VV2+)	Always	Below 1 Ω
   B27-2 (VVL-) - B47-11 (VV2-)	Always	Below 1 Ω
   B27-3 (VC) - B47-16 (VCV2)	Always	Below 1 Ω
   B15-1 (VVR+) or B47-9 (VV1+) - Body ground	Always	10 kΩ or higher
   B15-2 (VVR-) or B47-10 (VV1-) - Body ground	Always	10 kΩ or higher
   B15-3 (VC) or B47-15 (VCV1) - Body ground	Always	10 kΩ or higher
   B27-1 (VVL+) or B47-12 (VV2+) - Body ground	Always	10 kΩ or higher
   B27-2 (VVL-) or B47-11 (VV2-) - Body ground	Always	10 kΩ or higher
   B27-3 (VC) or B47-16 (VCV2) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B57 and B58 VVT sensor (for exhaust side) connectors.
2. Disconnect the B47 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B57-1 (EX+) - B47-13 (EV1+)	Always	Below 1 Ω
   B57-2 (EX-) - B47-14 (EV1-)	Always	Below 1 Ω
   B57-3 (VC2) - B47-15 (VCV1)	Always	Below 1 Ω
   B58-1 (EX+) - B47-18 (EV2+)	Always	Below 1 Ω
   B58-2 (EX-) - B47-17 (EV2-)	Always	Below 1 Ω
   B58-3 (VC2) - B47-16 (VCV2)	Always	Below 1 Ω
   B57-1 (EX+) or B47-13 (EV1+) - Body ground	Always	10 kΩ or higher
   B57-2 (EX-) or B47-14 (EV1-) - Body ground	Always	10 kΩ or higher
   B57-3 (VC2) or B47-15 (VCV1) - Body ground	Always	10 kΩ or higher
   B58-1 (EX+) or B47-18 (EV2+) - Body ground	Always	10 kΩ or higher
   B58-2 (EX-) or B47-17 (EV2-) - Body ground	Always	10 kΩ or higher
   B58-3 (VC2) or B47-16 (VCV2) - Body ground	Always	10 kΩ or higher

   HINT: 

   • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   • Make sure there is not an excessive amount of force applied to the wire harness.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the crankshaft position sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   117 

OK → END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE) 

1. Replace the VVT sensor. Refer to REMOVAL .
2. Check the engine start operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   140 

OK → END (VVT SENSOR IS DEFECTIVE)