Inspection Procedure

1. Perform troubleshooting in accordance with the table below.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   MIL remains ON	A
   MIL does not illuminate	B

B:  Go to step  5

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 / Trouble Codes.
5. Check if any DTCs have been stored. Note down any DTCs.
6. Clear DTCs (See DTC CHECK / CLEAR ).
7. Check if the MIL goes off.

   OK: MIL goes off 

NG: Go to step 3 

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS  (See DIAGNOSTIC TROUBLE CODE CHART )

1. Disconnect the ECM connector.
2. Turn the ignition switch to ON.

   OK: MIL is not illuminated. 

   Fig 1: Identifying ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 4 

OK: REPLACE ECM  (See REMOVAL  )

1. Disconnect the ECM connector.
2. Disconnect the combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   A27-24 (W) or H37-5 (CHK) - Body ground	Always	10 kΩ or higher

   Fig 2: Identifying ECM And Combination Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

1. Check if the MIL is illuminated when the ignition switch is turned to ON.

   OK: MIL should be illuminated. 

NG: Go to step 6 

OK: END 

1. Turn the ignition switch to ON.
2. Start the engine.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Engine starts	A
   Engine does not start*	B
   HINT: *: The Techstream cannot communicate with the ECM.

B: GO TO VC OUTPUT CIRCUIT 

A: Go to Next Step. 

1. Disconnect the ECM connector.
2. Disconnect the combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   A27-24 (W) - H37-5 (CHK)	Always	Below 1 Ω

   Fig 3: Identifying ECM And Combination Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )