SFI SYSTEM MIL Circuit

DESCRIPTION

The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM.

The MIL operation can be checked visually:

When the ignition switch is turned ON, the MIL should be illuminated and should then turn off after the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the GTS.

WIRING DIAGRAM

A001VXQE06
*1 Combination Meter Assembly
*2 CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE


  1. CHECK THAT MIL IS ILLUMINATED


    1. Perform troubleshooting in accordance with the table below.

      Result
      Result Condition Proceed to
      Illuminates → Turns off Ignition switch ON → After engine is started A
      Other than above - B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

  2. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Check the communication between the GTS and ECM.

      Tech Tips

      The Data List item "Engine and ECT" can be checked.

      Result
      Result Proceed to
      Communication is possible A
      Communication is not possible B

    B

    GO TO VC OUTPUT CIRCUIT Click here

    A

  3. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Health Check.

    5. Check the DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  4. PERFORM ACTIVE TEST USING GTS (CHECK ENGINE INDICATOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test / Check Engine Indicator.


      Body Electrical > Combination Meter > Active Test
      Tester Display
      Check Engine Indicator

    5. Check the status of the MIL while performing the Active Test.

      Result
      Result Proceed to
      Changes A
      Does not change B

    A

    REPLACE ECM Click here

    B

    REPLACE COMBINATION METER ASSEMBLY Click here