LIGHTING SYSTEM Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the map light assembly and spot light assembly.

WIRING DIAGRAM

B005AU1E01

CAUTION / NOTICE / HINT

Note


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

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    *: w/ Door Control Battery

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (ILLUMINATED ENTRY SYSTEM)


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Illuminated Entry System Turns on the lights that are controlled by the illuminated entry system* ON or OFF Perform the Active Test with door switch in the map light assembly turned on.

      *: Refer to Description for the lights that are controlled by the illuminated entry system.


      Body Electrical > Main Body > Active Test
      Tester Display
      Illuminated Entry System
      OK
      Map light and spot light comes on.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly.

      Click here

    2. Inspect the map light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  3. INSPECT SPOT LIGHT ASSEMBLY


    1. Remove the spot light assembly.

      Click here

    2. Inspect the spot light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPOT LIGHT ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - SPOT LIGHT ASSEMBLY)


    1. Disconnect the T6 and T7 map light assembly connectors.

    2. Disconnect the T11 spot light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T6-10 (RIFL) - T11-4 (CTY) Always Below 1 Ω
      T7-10 (RLMP) - T11-5 (GND1) Always Below 1 Ω
      T7-14 (RIFR) - T11-1 (B) Always Below 1 Ω
      T6-10 (RIFL) or T11-4 (CTY) - Body ground Always 10 kΩ or higher
      T7-10 (RLMP) or T11-5 (GND1) - Body ground Always 10 kΩ or higher
      T7-14 (RIFR) or T11-1 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. B0059V6E07

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 (ILE) - 4D-36 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here
    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for RHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here