EVAP System: Procedure

1. Turn the ignition switch off and wait for 10 seconds.
2. Turn the ignition switch to ON.
3. Turn the ignition switch off and wait for 10 seconds.
4. Connect the Techstream to the DLC3.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Trouble Codes.
7. Confirm DTCs and freeze frame data.

   If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P0455, P0456, P1451, P2404) will all be stored.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2013 - ] .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
6. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

NEXT: Go to next step 

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1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2013 - ] .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode.

NEXT: Go to next step 

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1. Check the EVAP pressure in step 1/5.
   RESULT
   
   

   DTC *	Result	Suspected Trouble Area	Proceed to
   -	Virtually no variation in EVAP pressure	Not yet determined	A
   P2404	EVAP pressure is less than -0.224 kPa(gauge) [2 mmHg(gauge)]	Leak detection pump stuck OFF	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

B → See step   9 

A: Go to next step 

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1. Check the EVAP pressure in steps 2/5.
   RESULT
   
   

   DTC*	Result	Suspected Trouble Area	Proceed to
   -	Virtually no variation in EVAP pressure	Not yet determined	A
   P2404	EVAP pressure fluctuates by more than +/- 0.3 kPa (gauge) [2 mmHg (gauge)]	Vent valve stuck close Reference orifice high-flow Reference orifice low-flow	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

   HINT: 

   The first reference pressure is the value determined in step 2/5.

B → See step   12 

A: Go to next step 

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1. Check the EVAP pressure in step 3/5.
   RESULT
   
   

   DTC*	Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure increases by 0.2 kPa (gauge) [2 mmHg (gauge)] or more within 12 seconds.	Not yet determined	A
   P2404	EVAP pressure increases by less than 0.2 kPa (gauge) [2 mmHg (gauge)] within 12 seconds. Virtually no variation in EVAP pressure	Vent valve stuck open	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

B → See step   14 

A: Go to next step 

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1. Check the EVAP pressure in step 4/5.
   RESULT
   
   

   DTC*	Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure is more than -5 kPa (gauge) [-38 mmHg (gauge)] within 900 seconds	Not yet determined	A
   P1451	EVAP pressure is reference pressure -0.9 kPa [- 7 mmHg] less then -5 kPa (gauge) [-38 mmHg (gauge)] within 27 seconds	Pipe clogged	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

B → See step   18 

A: Go to next step 

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1. Check the EVAP pressure in step 5/5.
2. Compare the EVAP pressure in step 4/5 and the reference pressure (step 5/5).
   RESULT
   
   

   DTC*	Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure increases by 0.3 kPa (gauge) [2 mmHg (gauge)] or less within 40 seconds.	Not yet determined (no leakage from EVAP system)	A
   P2404	EVAP pressure increases by more than 0.3 kPa (gauge) [2 mmHg (gauge)] within 40 seconds of proceeding from step 4/5 to 5/5	EVAP gross leak	B
   P0455	EVAP pressure from step 4/5 higher than [reference pressure (step 4/5) x 0.377]	EVAP gross leak	B
   P0456	EVAP pressure from step 4/5 higher than reference pressure (step D)	EVAP small leak	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

A → See step   27 

B → See step   20 

1. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.
2. Measure the voltage according to the value(s) in the table below.

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   TEXT IN ILLUSTRATION
   
   

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

   RESULT
   
   

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   G8-4 - Body ground	Leak detection pump on and off (Active Test ON and OFF)	Approximately 0 V when OFF and ON	Power source wire harness of leak detection pump	A
   		10 to 13 V when OFF and ON	Wire harness or connector between leak detection pump and ECM ECM	B
   		10 to 13 V when OFF Approximately 0 V when ON	Leak detection pump	C

B → See step   11 

C → See step   28 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.
3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.
   RESULT
   
   

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   G8-3 - Body ground	Ignition switch ON	11 to 14 V	Canister pump module	A
   		Below 1 V	Wire harness or connector between canister pump module and battery	B

A → See step   28 

B → See step   25 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.
3. Disconnect the ECM connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A35-8 (MPMP) - G8-4	Always	Below 1 Ω
   A35-8 (MPMP) or G8-4 - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Suspected Trouble Area	Proceed to
   OK	ECM	A
   NG	Wire harness or connector between ECM and canister pump module	B

A → See step   30 

B → See step   25 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Canister Pump Module)

3. Apply the battery voltage to terminals G8-5 and G8-1 of the canister pump module.
4. Touch the canister pump module to confirm the vent valve operation.
   RESULT
   
   

   Condition	Tester Result	Suspected Trouble Area	Proceed to
   Apply battery voltage to terminals G8-5 and G8-1	Operating	Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM	A
   	Not operating	Vent valve	B

B → See step   28 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.
3. Disconnect the ECM connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A35-1 (VPMP) - G8-1	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A35-1 (VPMP) or G8-1 - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Suspected Trouble Area	Proceed to
   OK	ECM	A
   NG	Wire harness or connector between ECM and canister pump module	B

A → See step   30 

B → See step   25 

1. Turn the ignition switch off.

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   TEXT IN ILLUSTRATION
   
   

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

2. Disconnect the canister pump module connector.
3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.
   RESULT
   
   

   Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
   G8-5 - Body ground	Ignition switch ON	11 to 14 V	Wire harness or connector between vent valve and ECM Vent valve Charcoal canister assembly (charcoal filter inside canister) clogged ECM	A
   		Below 1 V	Power source wire harness of vent valve	B

B → See step   25 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Canister Pump Module)

3. Apply the battery voltage to terminals G8-5 and G8-1 of the pump module.
4. Touch the canister pump module to confirm the vent valve operation.
   RESULT
   
   

   Condition	Tester Result	Suspected Trouble Area	Proceed to
   Apply battery voltage to terminals G8-5 and G8-1	Operating	Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM	A
   	Not operating	Vent valve	B

B → See step   28 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the canister pump module connector.
3. Disconnect the ECM connector.
4. Measure the resistance according to the value(s) in the table below.
   RESULT
   
   

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   A35-1 (VPMP) - G8-1	Always	Below 1 Ω	Charcoal canister assembly (charcoal filter inside canister) clogged ECM	A
   		10 kΩ or higher	Wire harness or connector between ECM and charcoal canister assembly pump module	B

B → See step   25 

A: Go to next step 

1. Check for filter blockage in the charcoal canister assembly. Refer to INSPECTION [07/2013 - ] .

   OK

   No blockages in the charcoal canister assembly.

OK → See step   30 

NG → See step   24 

1. Check for blockages in the EVAP purge line between the charcoal canister assembly and canister pump module.

   OK

   No blockages in the EVAP purge line between the charcoal canister assembly and canister pump module.

NG → See step   26 

OK: Go to next step 

1. Check for blockages in the EVAP purge line between the charcoal canister assembly and fuel tank.

   OK

   No blockages in the EVAP purge line between the charcoal canister assembly and fuel tank.

OK → See step   24 

NG → See step   26 

1. Check that the fuel tank cap assembly is correctly installed and confirm that the fuel tank cap assembly meets OEM specifications.
2. Tighten the fuel tank cap assembly firmly (only one click sound could be heard).
   RESULT
   
   

   Test Result	Suspected Trouble Area	Proceed to
   fuel tank cap assembly correctly installed	-	A
   fuel tank cap assembly loose	fuel tank cap assembly improperly installed Defective fuel tank cap assembly fuel tank cap assembly does not meet OEM specifications	B
   Defective fuel tank cap assembly	-	B
   No fuel tank cap assembly	-	C

B → See step   22 

C → See step   23 

A: Go to next step 

1. Check for leakage from EVAP system (hose, disconnection, cracks, etc.).
2. Repair or replace the leak point.

NEXT → See step   29 

HINT: 

• When reinstalling the fuel tank cap assembly, tighten it firmly (only one click sound could be head).
• When replacing the fuel tank cap assembly, use a fuel tank cap assembly that meets OEM specifications, and install it firmly.

NEXT → See step   29 

HINT: 

When installing the fuel tank cap assembly, tighten it firmly (only one click sound could be head).

NEXT → See step   29 

1. Replace the charcoal canister assembly. Refer to REMOVAL [07/2013 - ] .
   NOTE:

   • When replacing the charcoal canister assembly, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.
   • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister pump module.

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   TEXT IN ILLUSTRATION
   
   

   *1	Fuel Tank Vent Hose	*2	Air Inlet Port
   *3	Drain Hose	*4	Fuel Tank
   *5	Charcoal Canister Assembly	-	-
   *a	Inspection Area (check for disconnection and/or cracks)	-	-

NEXT → See step   29 

NEXT → See step   29 

NEXT → See step   29 

1. Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.

NEXT → See step   29 

1. Replace the canister pump module. Refer to REMOVAL [07/2013 - ] .
   NOTE:

   • When replacing the charcoal canister assembly, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.
   • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Fuel Tank Vent Hose	*2	Air Inlet Port
   *3	Vent Hose	*4	Fuel Tank
   *5	Charcoal Canister Assembly	-	-
   *a	Inspection Area (check for disconnection and/or cracks)	-	-

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2013 - ] .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
6. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.
   RESULT
   
   

   Result	Proceed to
   EVAP system DTCs are output	A
   No DTCs output (No pending DTCs output)	B

B → END 

A: Go to next step 

1. Replace the ECM. Refer to REMOVAL [07/2013 - 12/2013] .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [07/2013 - ] .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
6. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

   HINT: 

   If no pending DTCs are found, the repair has been successfully completed.

NEXT → END