Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT CHART
   
   

   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 intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Check whether any DTCs have been stored (see DTC CHECK / CLEAR  ). Write them down if necessary.
4. Clear DTCs (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 E5 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: Disconnecting E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : GO TO NEXT STEP 

1. Check the harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

OK : REPAIR OR REPLACE COMBINATION METER 

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Standard: MIL should be illuminated. 

OK : SYSTEM OK 

NG : GO TO NEXT STEP 

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

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   Engine starts	A
   Engine does not start*	B

   HINT:

   *: The intelligent tester 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 COMBINATION METER 

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