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 power switch is turned on (IG), the MIL should be illuminated and should then turn off after the power switch is turned on (READY). If the MIL remains illuminated or does not illuminate, conduct the following troubleshooting procedure.

WIRING DIAGRAM

A001OLKE05
*1 to Other ECUs
*2 Combination Meter Assembly
*3 Network Gateway ECU
*4 CAN Communication Line

CAUTION / NOTICE / HINT

Note

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
      MIL Condition Proceed to
      Illuminates → Turns off Power switch on (IG) → Power switch on (READY) A
      Other than above - B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

  2. CHECK COMMUNICATION BETWEEN GTS AND ECM


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Check the communication between the GTS and ECM.

      Tech Tips

      Communication can be checked by using the Data List item Engine.

      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 power switch on (IG).

    3. Turn the GTS on.

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

    5. Check if any DTCs have been detected. Note down any DTCs.

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

      Tech Tips

      Check for detected DTCs output from other ECUs which relate to the MIL.


    B

    REPAIR CIRCUIT INDICATED BY OUTPUT

    A

  4. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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. According to the display on the GTS, perform the Active Test and check the operation of the MIL.

      Result
      Result Proceed to
      Changes A
      Does not change B

    A

    REPLACE ECM Click here

    B

    REPLACE COMBINATION METER ASSEMBLY Click here