LIGHTING SYSTEM Ambient Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the ambient lights.

WIRING DIAGRAM

A01G75HE01

INSPECTION PROCEDURE

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. CHECK SYMPTOMS


    1. Check symptoms.

      Result
      Result Proceed to
      Ambient lights do not illuminate. (for front and rear doors) A
      Ambient light does not illuminate. (for instrument panel) B

    B

    PERFORM ACTIVE TEST USING GTS Click here

    A

  2. 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 / Main Body / Active Test.

    5. Check that the ambient lights come on.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Interior Illumination Light2 Ambient light (for front and rear doors) ON/OFF Engine switch is turned off just before performing the Active Test.
      OK
      Ambient lights come on.

    NG

    CHECK HARNESS AND CONNECTOR (DOME FUSE - DOOR TRIM BOARD SUB-ASSEMBLY) Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  3. CHECK HARNESS AND CONNECTOR (DOME FUSE - DOOR TRIM BOARD SUB-ASSEMBLY)


    1. Disconnect the M7 front door trim board sub-assembly LH connector.

    2. Disconnect the L8 front door trim board sub-assembly RH connector.

    3. Disconnect the O3 rear door trim board sub-assembly LH connector.

    4. Disconnect the N3 rear door trim board sub-assembly RH connector.

    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      M7-1 (+) - Body ground Engine switch off 11 to 14 V
      L8-1 (+) - Body ground Engine switch off 11 to 14 V
      O3-1 (+) - Body ground Engine switch off 11 to 14 V
      N3-1 (+) - Body ground Engine switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DOOR TRIM BOARD SUB-ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H11 main body ECU (multiplex network body ECU) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      M7-2 (-) - H11-6 (LED2) Always Below 1 Ω
      L8-2 (-) - H11-6 (LED2) Always Below 1 Ω
      O3-2 (-) - H11-6 (LED2) Always Below 1 Ω
      N3-2 (-) - H11-6 (LED2) Always Below 1 Ω
      M7-2 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  5. 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 / Main Body / Active Test.

    5. Check that the ambient lights come on.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Interior Illumination Light1 Ambient light (for instrument panel) ON/OFF Engine switch is turned off just before performing the Active Test.
      OK
      Ambient light come on.

    NG

    INSPECT INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  6. INSPECT INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY


    1. Remove the interior illumination light sub-assembly Click here.

    2. Inspect the interior illumination light sub-assembly Click here.

      OK
      Interior illumination light comes on.

    NG

    REPLACE INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (DOME FUSE - INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY)


    1. Disconnect the H73 interior illumination light sub-assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      H73-5 (RRIL) - Body ground Engine switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H11 main body ECU (multiplex network body ECU) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H73-3 (-) - H11-5 (LED1) Always Below 1 Ω
      H73-3 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here