LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) receives a door open or closed signal from each door courtesy light switch.

WIRING DIAGRAM

B00185BE03

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. READ VALUE USING GTS (DOOR COURTESY LIGHT SWITCH)


    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 / Data List.

    5. Read the Data List according to the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Door Courtesy SW

      Rear door courtesy light switch RH signal/

      ON or OFF

      ON: Rear door RH open

      OFF: Rear door RH closed

      		 -
      RL Door Courtesy SW

      Rear door courtesy light switch LH signal/

      ON or OFF

      ON: Rear door LH open

      OFF: Rear door LH closed

      		 -
      FR Door Courtesy

      Front door courtesy light switch RH signal/

      ON or OFF

      ON: Front door RH closed

      OFF: Front door RH open

      		 -
      FL Door Courtesy

      Front door courtesy light switch LH signal/

      ON or OFF

      ON: Front door LH closed

      OFF: Front door LH open

      		 -
      OK
      Normal conditions listed above are displayed.
      Result
      Result Proceed to
      OK A
      NG (Rear door courtesy light switch RH does not operate) B
      NG (Rear door courtesy light switch LH does not operate) C
      NG (Front door courtesy light switch RH does not operate) D
      NG (Front door courtesy light switch LH does not operate) E

    A

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

    C

    INSPECT REAR DOOR COURTESY LIGHT SWITCH LH Click here

    D

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH RH Click here

    E

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH LH Click here

    B

  2. INSPECT REAR DOOR COURTESY LIGHT SWITCH RH


    1. Remove the rear door courtesy light switch RH Click here.

    2. Inspect the rear door courtesy light switch RH Click here.


    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH RH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH RH - COWL SIDE JUNCTION BLOCK LH)


    1. Disconnect the L2 rear door courtesy light switch RH connector.

    2. Disconnect the 2J cowl side junction block LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L2-1 - 2J-29 Always Below 1 Ω
      L2-1 or 2J-29 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT 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.

      B001AUME03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-2 (RCTY) - 2J-29 Always Below 1 Ω
      MB-2 (RCTY) or 2J-29 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  5. INSPECT REAR DOOR COURTESY LIGHT SWITCH LH


    1. Remove the rear door courtesy light switch LH Click here.

    2. Inspect the rear door courtesy light switch LH Click here.


    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH LH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH LH - COWL SIDE JUNCTION BLOCK LH)


    1. Disconnect the K3 rear door courtesy light switch LH connector.

    2. Disconnect the 2K cowl side junction block LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K3-1 - 2K-34 Always Below 1 Ω
      K3-1 or 2K-34 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT 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.

      B001A8ME03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-13 (LCTY) - 2K-34 Always Below 1 Ω
      MB-13 (LCTY) or 2K-34 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  8. INSPECT FRONT DOOR COURTESY LIGHT SWITCH RH


    1. Remove the rear door courtesy light switch RH Click here.

    2. Inspect the rear door courtesy light switch RH Click here.


    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH RH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the L1 front door courtesy light switch RH connector.

    2. Disconnect the E118 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
      L1-1 - E118-27 (FRCY) Always Below 1 Ω
      L1-1 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT FRONT DOOR COURTESY LIGHT SWITCH LH


    1. Remove the front door courtesy light switch LH Click here.

    2. Inspect the front door courtesy light switch LH Click here.


    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH LH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K2 front door courtesy light switch LH connector.

    2. Disconnect the E118 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
      K2-1 - E118-6 (FLCY) Always Below 1 Ω
      K2-1 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR