Inspection Procedure

HINT:

Troubleshoot each trouble symptom in accordance with the table below.

1. CHECK MIL CONDITION (WHETHER MIL TURNS OFF) 
   1. Connect an intelligent tester or OBD II scan tool to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester or scan tool 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 

   NG: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) 
   1. Disconnect the E6 ECM connector.
   2. Turn the ignition switch to ON.
   3. Check that the MIL is not illuminated.

      OK: 

      MIL is not illuminated 

   4. Reconnect the ECM connector.

   OK : REPLACE ECM 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

3. CHECK MIL (MIL IS ILLUMINATED) 
   1. Check if the MIL is illuminated when the ignition switch is turned to ON.

      OK: 

      MIL should be illuminated. 

   OK : SYSTEM IS OK 

   NG: Go to Next Step 

4. INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT) 
   1. See the combination meter troubleshooting procedure (See HOW TO PROCEED WITH TROUBLESHOOTING ).

   NG: CHECK AND REPAIR COMBINATION METER ASSEMBLY 

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