Inspection Procedure

HINT:

Troubleshoot each trouble symptom in accordance with SYMPTOM TROUBLESHOOT  .

1. CLEAR DTC 
   1. Connect the hand-held tester or the OBD II scan tool to the DLC 3.
   2. Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
   3. Read the DTC (See PRE-CHECK  )
   4. Clear the DTC (See PRE-CHECK  ).
   5. Check that MIL does not illuminate.

      Standard: MIL does not illuminate 

   1. OK: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (See  DIAGNOSTIC TROUBLE CODE TABLE   ) 
   2. NG: GO TO NEXT STEP. 
2. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) 
   Fig 1: Disconnecting E4 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the E4 ECM connector.
   2. Turn the ignition switch ON.
   3. Check that MIL does not illuminate.

      Standard: MIL does not illuminate 

   4. Reconnect the ECM connector.
   1. OK: CHECK AND REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
   2. NG: CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER - ECM) 
3. CHECK THAT MIL ILLUMINATE 
   1. Check that MIL illuminates when turning the ignition switch ON.

      Standard: MIL illuminates 

   1. OK: SYSTEM OK 
   2. NG: GO NEXT STEP 
4. INSPECT COMBINATION METER ASSY (MIL CIRCUIT) 
   1. See the combination meter troubleshooting on PROBLEM SYMPTOMS TABLE .
   1. NG: REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY 
   2. OK: CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER - ECM)