Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT REFERENCE
   
   

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

B :  Go to step  4

A : Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Check whether any DTCs have been stored (See DTC CHECK/CLEAR ). Note them down if necessary.
5. Clear DTCs (See DTC CHECK/CLEAR ).
6. Check if the MIL turns OFF.

   OK: 

   MIL should turn OFF. 

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

NG : Go to next step 

1. Disconnect the A7 ECM connector.
2. Turn the engine switch on (IG).
3. Check that the MIL is not illuminated.

   OK: 

   MIL is not illuminated. 

OK : REPLACE ECM  (See REMOVAL  )

Fig 1: Identifying A7 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER - ECM) 

1. Check if the MIL is illuminated when the engine switch is turned on (IG).

   OK: 

   MIL should be illuminated. 

OK : SYSTEM OK 

NG : Go to next step 

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: *: Techstream cannot communicate with the ECM.

B :  GO TO VC OUTPUT CIRCUIT 

A : Go to next step 

1. See the combination meter troubleshooting procedure (See HOW TO PROCEED WITH TROUBLESHOOTING ).

NG : REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY 

OK : CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER - ECM)