LIGHTING SYSTEM Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the map light sub-assembly (front dome light).

WIRING DIAGRAM

Figure 1. for LHD:

B000XC8E04

Figure 2. for RHD:

B000XC8E05

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses and lights 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
      Illuminated Entry System Map light sub-assembly (front dome light) illumination ON or OFF Perform the Active Test with DOOR switch in the map light sub-assembly turned on.

      Body Electrical > Main Body > Active Test
      Tester Display
      Illuminated Entry System
      OK
      Map light sub-assembly (front dome light) turn on.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (MAP LIGHT SUB-ASSEMBLY - BATTERY)


    1. B000Z7AC04
      *a

      Front view of wire harness connector

      (to Map Light Sub-assembly)

      Disconnect the map light sub-assembly connector.

    2. Enter the following menus: Body Electrical / Main Body / Active Test / Control the DOME CUT D relay.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Relay for Interior Light Auto Cut Function DOME CUT D relay ON or OFF

      ON: DOME CUT D relay off (interior lights turn off)

      OFF: DOME CUT D relay on (interior lights turn on)

      Body Electrical > Main Body > Active Test
      Tester Display
      Relay for Interior Light Auto Cut Function

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

      Standard Voltage
      Tester Connection GTS Operation Specified Condition
      Z2-4 (+B1) - Body ground Active Test is not performed (OFF) 11 to 14 V
      Active Test is performed (ON) Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT SUB-ASSEMBLY - BATTERY AND BODY GROUND)


    1. B000Z7AC03
      *a

      Front view of wire harness connector

      (to Map Light Sub-assembly)

      Disconnect the map light sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Z2-5 (+B2) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Z2-6 (GND9) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY- MAP LIGHT SUB-ASSEMBLY) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  4. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY- MAP LIGHT SUB-ASSEMBLY)


    1. Disconnect the 3A driver side junction block assembly connector.

    2. Disconnect the Z2 map light sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-41 - Z2-1 (CTY) Always Below 1 Ω
      3A-41 or Z2-1 (CTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B000WCRC05
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-41 - A-1 (ILE) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY- MAP LIGHT SUB-ASSEMBLY)


    1. Disconnect the 3B driver side junction block assembly connector.

    2. Disconnect the Z2 map light sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-13 - Z2-1 (CTY) Always Below 1 Ω
      3B-13 or Z2-1 (CTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B000U1QC01
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-13 - A-1 (ILE) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here