Inspection Procedure

HINT: Troubleshoot each trouble symptom in accordance with the table below.

1. CHECK WHETHER MIL TURNS OFF 
   1. Connect hand-held 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.

      Standard: MIL should turn off. 

   1. OK : REPAIR CIRCUIT INDICATED BY OUTPUT DTC (See  DIAGNOSTIC TROUBLE CODE TABLE   ) 
   2. 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 MIL is not illuminated.

      Standard: MIL is not illuminated 

   4. Reconnect the ECM connector.
      Fig 1: Disconnecting E6 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : REPLACE ECM (See  REPLACEMENT  ) 
   2. NG : CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER - ECM) 
3. CHECK THAT MIL IS ILLUMINATED 
   1. Check if the MIL is illuminated when the ignition switch is turned to ON.

      Standard: MIL should be illuminated. 

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