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 engine switch is first turned on (IG), 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

Figure 1. for RHD

B006E5NE19
*1 Combination Meter Assembly
*2 Network Gateway ECU
*3 CAN Communication Line

Figure 2. for LHD

B005QQCE01
*a Combination Meter Assembly
*b Network Gateway ECU
*c Shift Control ECU
*d CAN Communication Line

PROCEDURE


  1. CHECK THAT MIL IS ILLUMINATED


    1. Perform troubleshooting in accordance with the table below.

      Result
      MIL Condition Proceed to
      Illuminates → Turns off Engine switch on (IG) → engine is started 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 engine switch on (IG).

    3. Turn the GTS on.

    4. Check the communication between the GTS and ECM.

      Tech Tips

      It can be checked using the "Engine" item of the Data List.

      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 engine 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
      Any DTCs is 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 engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test / Check Engine Warning*1


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

      Enter the following menus: Body Electrical / Combination Meter / Active Test / Multi Display Default Screen*2


      Body Electrical > Combination Meter > Active Test
      Tester Display
      Multi Display Default Screen

      *1: for Sports package

      *2: for except Sports package

    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