LIGHTING SYSTEM Ambient Illumination Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

B004RW9E02
*a from Auxiliary Battery
*b ECU-B P NO.2
*c Multi-display (Interior Illumination Light Assembly)
*d Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Perform the Active Test according to the display on the GTS.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Interior Illumination Light2 Multi-display (interior illumination light assembly) OFF or ON

      Preconditions for using the Active Test to check dimmer controlled illumination:


      • Power switch on (READY).

      • Shift lever is in any position other than P.

      Body Electrical > Main Body > Active Test
      Tester Display
      Interior Illumination Light2
      OK
      Multi-display (interior illumination light assembly) turn on or off.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY [INTERIOR ILLUMINATION LIGHT ASSEMBLY] - BATTERY AND BODY GROUND)


    1. Disconnect the G1 multi-display (interior illumination light assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G1-1 (+B) - Body ground Power switch off 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G1-8 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY [INTERIOR ILLUMINATION LIGHT ASSEMBLY] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the G1 multi-display (interior illumination light assembly) connector.

    2. Disconnect the G17 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G1-7 (ILL) - G17-21 (LED2) Always Below 1 Ω
      G1-7 (ILL) or G17-21 (LED2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK MULTI-DISPLAY


    1. Replace the multi-display.

      Click here

    2. Perform the Active Test according to the display on the GTS.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Interior Illumination Light2 Multi-display (interior illumination light assembly) OFF or ON

      Preconditions for using the Active Test to check dimmer controlled illumination:


      • Power switch on (READY).

      • Shift lever is in any position other than P.

      Body Electrical > Main Body > Active Test
      Tester Display
      Interior Illumination Light2
      OK
      Multi-display (interior illumination light assembly) turn on or off.
      Result
      Proceed to
      OK
      NG

    OK

    END (MULTI-DISPLAY IS DEFECTIVE)

    NG

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