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

B002DOUE03

CAUTION / NOTICE / HINT

Note


  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

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

PROCEDURE


  1. READ VALUE USING GTS (DOOR COURTESY SW)


    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.


      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 - COWL SIDE JUNCTION BLOCK LH)


    1. Disconnect the T4 front door courtesy light switch assembly RH connector.

    2. Disconnect the 5A 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
      T4-1 - 5A-33 Always Below 1 Ω
      T4-1 or 5A-33 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT COWL SIDE JUNCTION BLOCK LH


    1. B002ETKC01
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      Remove the cowl side junction block LH.

      Click here

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

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-4(FRCY) - 5A-33 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  5. 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

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


    1. Disconnect the U5 front door courtesy light switch assembly LH connector.

    2. Disconnect the 5C 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
      U5-1 - 5C-44 Always Below 1 Ω
      U5-1 or 5C-44 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT COWL SIDE JUNCTION BLOCK LH


    1. B002CG2C01
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      Remove the cowl side junction block LH.

      Click here

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

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-2 (FLCY) - 5C-44 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  8. 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

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


    1. Disconnect the T18 rear door courtesy light switch assembly RH connector.

    2. Disconnect the K11 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
      T18-1 - K11-6 (RCTY) Always Below 1 Ω
      T18-1 or K11-6 (RCTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. 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

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


    1. Disconnect the U14 rear door courtesy light switch assembly LH connector

    2. Disconnect the K10 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
      U14-1 - K10-6 (LCTY) Always Below 1 Ω
      U14-1 or K10-6 (LCTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR