LIGHTING SYSTEM Instrument Panel Box Light and Footwell Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the rear door courtesy light switch assembly.

WIRING DIAGRAM

A01VUR8E02

CAUTION / NOTICE / HINT

Note


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

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Buzzer Function

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / (desired system) / Active Test.

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


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Fr Foot Light Footwell light and instrument panel box light ON or OFF -

      Body Electrical > Main Body > Active Test
      Tester Display
      Fr Foot Light
      OK
      Footwell light and instrument panel box lights comes on.
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and start system) B
      NG (w/ Stop and start system) C

    A

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

    C

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - No. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) Click here

    B

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2E*1 or 2G*2 instrument panel junction block assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2E-1 - Body ground*1 Always 11 to 14 V
      2G-1 - Body ground*2 Always 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Disconnect the 2B instrument panel junction block assembly connector.

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

      A01VXMMC03
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      2E-1*1 - 2B-27 Always Below 1 Ω
      2G-1*2 - 2B-27 Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (No. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the J13 No. 1 interior illumination light assembly LH connector.

    2. Disconnect the J37 No. 1 interior illumination light assembly RH connector.

    3. Disconnect the J18 No. 1 interior illumination light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-27 - J13-2(B) Always Below 1 Ω
      2B-27 - J37-2(B) Always Below 1 Ω
      2B-27 - J18-2(B) Always Below 1 Ω
      J13-2(B) or 2B-27 - Body ground Always 10 kΩ or higher
      J37-2(B) or 2B-27 - Body ground Always 10 kΩ or higher
      J18-2(B) or 2B-27 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (No. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2A-37 - J13-1(E) Always Below 1 Ω
      2A-37 - J37-1(E) Always Below 1 Ω
      2A-37 - J18-1(E) Always Below 1 Ω
      J13-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      J37-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      J18-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

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

      Click here

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

      A01VTMFC07
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      2A-37 - MB-26 (FSPT) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - No. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)


    1. Disconnect the J13 No. 1 interior illumination light assembly LH connector.

    2. Disconnect the J37 No. 1 interior illumination light assembly RH connector.

    3. Disconnect the J18 No. 1 interior illumination light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J13-2 - Body ground Always 10.5 to 16 V
      J37-2 - Body ground Always 10.5 to 16 V
      J18-2 - Body ground Always 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STOP AND START SYSTEM Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (No. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2A-37 - J13-1(E) Always Below 1 Ω
      2A-37 - J37-1(E) Always Below 1 Ω
      2A-37 - J18-1(E) Always Below 1 Ω
      J13-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      J37-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      J18-1(E) or 2A-37 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR