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Inspection Procedure

  1. CHECK THAT MIL IS ILLUMINATED 
    1. Perform troubleshooting in accordance with the chart below.

      Result 

      RESULT CHART

      Condition Proceed to
      MIL remains illuminated A
      RAIL not illuminated B

    B: Go to step  4

    A: Go to Next Step 

  2. CHECK WHETHER MIL TURNS OFF 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Turn the Techstream on.
    4. Check whether any DTCs have been stored (See DTC CHECK/CLEAR  ). Note them down if necessary.
    5. Clear the DTCs (See DTC CHECK/CLEAR  ).
    6. Check if the MIL turns off.

      OK: 

      MIL should turn off. 

    OK: REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

    NG: Go to Next Step 

  3. CHECK WIRE HARNESS (FOR SHORT) 
    1. Disconnect the E5 ECM connector.
    2. Turn the ignition switch to the ON position.
    3. Check that the MIL is not illuminated.

      OK: 

      MIL is not illuminated 

    4. Reconnect the ECM connector.

    OK: REPLACE ECM  (See REMOVAL )

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

    Fig 1: Disconnecting The E5 ECM Connector
    G05539174Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK THAT MIL IS ILLUMINATED 
    1. Check if the MIL is illuminated when the ignition switch is turned to the ON position.

      OK: 

      MIL should be illuminated. 

    OK: SYSTEM OK 

    NG: Go to Next Step 

  5. CHECK THAT ENGINE STARTS 
    1. Turn the ignition switch to the ON position.
    2. Start the engine.

    Result 

    RESULT CHART

    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  (See VC OUTPUT CIRCUIT )

    A: Go to Next Step 

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

    NG: REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY 

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