Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT REFERENCE
   
   

   Condition	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 ON and turn the tester ON.
3. Check whether any DTCs have been stored (See DIAGNOSTIC TROUBLE CODE CHART  ). Note them down if necessary.
4. Clear the DTC (See DTC CHECK/CLEAR  ).
5. Check if the MIL turns off.

   OK: MIL should turn off. 

OK: REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

NG: Go to Next Step 

1. Disconnect the E8 ECM connector.
2. Turn the ignition switch ON.
3. Check that the MIL is not illuminated.

   OK: MIL is not illuminated. 

OK: REPLACE ECM 

Fig 1: Checking Harness And Connector (Check For Short In Wire Harness)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to Next Step 

1. Check the harness and connector.

OK: REPAIR OR REPLACE COMBINATION METER 

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

1. Check that the MIL is illuminated when turning the ignition switch ON

   OK: MIL is illuminated. 

OK: SYSTEM OK 

NG: Go to Next Step 

1. Turn the ignition switch 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. See the combination meter troubleshooting section (See HOW TO PROCEED WITH TROUBLESHOOTING ).

NG: REPAIR OR REPLACE COMBINATION METER 

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