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

B0059ATE01

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. READ VALUE USING GTS (DOOR COURTESY SW)


    1. Using the GTS, read the Data List.

      Click here


      Body Electrical > Main Body > Data List
      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 SW Front door courtesy light switch RH signal ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

      		 -
      FL Door Courtesy SW Front door courtesy light switch LH signal ON or OFF

      ON: Front door LH open

      OFF: Front door LH closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      RR Door Courtesy SW
      RL Door Courtesy SW
      FR Door Courtesy SW
      FL Door Courtesy SW
      OK
      Normal conditions listed above are displayed.
      Result
      Result Proceed to
      OK A
      NG (Front door courtesy light switch assembly RH does not operate) B
      NG (Front door courtesy light switch assembly LH does not operate) C
      NG (Rear door courtesy light switch assembly RH does not operate) D
      NG (Rear door courtesy light switch assembly LH does not operate) E

    A

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

    C

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH Click here

    D

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH Click here

    E

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH Click here

    B

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH


    1. Remove the front door courtesy light switch assembly RH.

      Click here

    2. Inspect the front door courtesy light switch assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the P3 front door courtesy light switch assembly RH connector.

    2. Disconnect the I48 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
      P3-1 - I48-27 (FRCY) Always Below 1 Ω
      P3-1 or I48-27 (FRCY) - Body ground Always 10 kΩ or higher
      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

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH


    1. Remove the front door courtesy light switch assembly LH.

      Click here

    2. Inspect the front door courtesy light switch assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the Q3 front door courtesy light switch assembly LH connector.

    2. Disconnect the I48 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
      Q3-1 - I48-6 (FLCY) Always Below 1 Ω
      Q3-1 or I48-6 (FLCY) - Body ground Always 10 kΩ or higher
      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

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH


    1. Remove the rear door courtesy light switch assembly RH.

      Click here

    2. Inspect the rear door courtesy light switch assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the P6 rear door courtesy light switch assembly RH connector.

    2. Disconnect the 4D instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P6-1 - 4D-37 Always Below 1 Ω
      P6-1 or 4D-37 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. B0059V6E06

      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-2 (RCTY) - 4D-37 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

  9. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH


    1. Remove the rear door courtesy light switch assembly LH.

      Click here

    2. Inspect the rear door courtesy light switch assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the Q6 rear door courtesy light switch assembly LH connector.

    2. Disconnect the 4A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q6-1 - 4A-18 Always Below 1 Ω
      Q6-1 or 4A-18 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. B0058JLE05

      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-13 (LCTY) - 4A-18 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