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 engine switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
4. Check if any DTCs are output. Note down any DTCs.
5. Clear DTCs (See DTC CHECK/CLEAR ).
6. Check if the MIL goes off.

   Standard: 

   MIL goes off 

NG: Go to step 3 

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

Fig 1: Identifying A38 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A38 ECM connector.
2. Turn the engine switch on (IG).
3. Check that the MIL is not illuminated.

   OK: 

   MIL is not illuminated. 

NG: Go to step 4 

OK: REPLACE ECM  (See ECM  )

1. Disconnect the A38 ECM connector.
2. Disconnect the E8 combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A38-24 (W) or E8-12 (CHK) - Body ground	Always	10 kΩ or higher

   Fig 2: Identifying A38 ECM And E8 Combination Meter Connectors

   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 engine switch is turned on (IG).

   OK: MIL is illuminated. 

NG: Go to step 6 

OK: SYSTEM OK 

1. Turn the engine switch on (IG).
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  (See VC OUTPUT CIRCUIT  )

A: Go to next step 

1. Disconnect the A38 ECM connector.
2. Disconnect the E8 combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A38-24 (W) - E8-12 (CHK)	Always	Below 1 Ω

   Fig 3: Identifying A38 ECM And E8 Combination Meter Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )