LIGHTING SYSTEM Door Illumination Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:


WIRING DIAGRAM

B0018F9E02

CAUTION / NOTICE / HINT

Note


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

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (INTERIOR ILLUMINATION LIGHT1)


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

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Interior Illumination Light1 door illumination light* OFF or ON -

      *: 15 seconds after turning the engine switch off, check the operation once the rear door illumination turns off.

      OK
      Door illumination illuminates.

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (BATTERY - DOOR TRIM BOARD SUB-ASSEMBLY)


    1. Disconnect the m2, m5, n1 and n3 No. 1 interior illumination light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      m2-1 (+) - Body ground Always 10.5 to 16 V
      m5-1 (+) - Body ground Always 10.5 to 16 V
      n1-1 (+) - Body ground Always 10.5 to 16 V
      n3-1 (+) - Body ground Always 10.5 to 16 V

    NG

    CHECK COWL SIDE JUNCTION BLOCK LH Click here

    OK

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

    B001AR0E03
    Text in Illustration
    *a

    Front view of wire harness connector

    Front door trim board sub-assembly RH (No. 1 interior illumination light assembly RH)
    *b

    Front view of wire harness connector

    Front door trim board sub-assembly LH (No. 1 interior illumination light assembly LH)
    *c

    Front view of wire harness connector

    Rear door trim board sub-assembly RH (No. 1 interior illumination light assembly RH)
    *d

    Front view of wire harness connector

    Rear door trim board sub-assembly LH (No. 1 interior illumination light assembly LH)

    1. Disconnect the m2, m5, n1 and n3 No. 1 interior illumination light assembly connector.

    2. Disconnect the E117 main body ECU (multiplex network body ECU) connector.

    3. Remove the main body ECU (multiplex network body ECU) from the junction block assembly LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E117-21 (LED1) - m2-2 (-) Always Below 1 Ω
      E117-21 (LED1) - m5-2 (-) Always Below 1 Ω
      E117-21 (LED1) - n1-2 (-) Always Below 1 Ω
      E117-21 (LED1) - n3-2 (-) Always Below 1 Ω
      E117-21 (LED1) or m2-2 (-) - Body ground Always 10 kΩ or higher
      E117-21 (LED1) or m5-2 (-) - Body ground Always 10 kΩ or higher
      E117-21 (LED1) or n1-2 (-) - Body ground Always 10 kΩ or higher
      E117-21 (LED1) or n3-2 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK DOOR TRIM BOARD SUB-ASSEMBLY


    1. Replace the door trim board sub-assembly with a new or known good one.


    2. Check that each function of the No. 1 interior illumination light assembly operates normally.

      OK
      Door interior illumination lights illuminate.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END (DOOR TRIM BOARD SUB-ASSEMBLY IS DEFECTIVE)

    B

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

    C

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

  5. CHECK COWL SIDE JUNCTION BLOCK LH


    1. Remove the cowl side junction block LH.


    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.


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

      B001A8IE03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      2F-1 - 2K-36 Always Below 1 Ω
      2F-1 - 2J-9 Always Below 1 Ω
      2F-1 or 2K-36 - Body ground Always 10 kΩ or higher
      2F-1 or 2J-9 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - DOOR TRIM BOARD SUB-ASSEMBLY)

    B

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here