LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU detects the condition of each door courtesy light switch.

WIRING DIAGRAM

A004A3LE01

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. According to the display on the intelligent tester, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Door Courtesy SW*1

      Rear door courtesy light switch RH signal /

      OFF or ON

      OFF: Rear door RH closed

      ON: Rear door RH opened

      		 -
      RL Door Courtesy SW*1

      Rear door courtesy light switch LH signal /

      OFF or ON

      OFF: Rear door LH closed

      ON: Rear door LH opened

      		 -
      Back Door Courtesy SW

      Back door courtesy light switch signal /

      OFF or ON

      OFF: Back door closed

      ON: Back door opened

      		 -
      FR Door Courtesy

      Front door courtesy light switch RH signal /

      ON or OFF

      ON: Front door RH closed

      OFF: Front door RH opened

      		 -
      FL Door Courtesy

      Front door courtesy light switch LH signal /

      ON or OFF

      ON: Front door LH closed

      OFF: Front door LH opened

      		 -
      OK
      Normal conditions listed above are displayed.
      Result
      Result Proceed to
      OK A
      NG (Front door courtesy light switch assembly does not operate) B
      NG (Rear door courtesy light switch assembly does not operate)*1 C
      NG (Back door courtesy switch) D

      *1: for 5 Door


    A

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

    C

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    D

    INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH) Click here

    B

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY


    1. Remove the front door courtesy light switch assembly.

      Click here

    2. Inspect the front door courtesy light switch assembly.

      Click here

      Result
      Result Proceed to
      OK (for LH) A
      OK (for RH) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU) Click here

    C

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the K1 front door courtesy light switch assembly LH connector.

    2. Disconnect the 3D 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
      K1-1 - 3D-36 Always Below 1 Ω
      K1-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

    2. Remove the main body ECU from the instrument panel junction block assembly.

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

      A0046YQC01
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-36 - MB-2 (FLCY) Always Below 1 Ω

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - MAIN BODY ECU)


    1. Disconnect K2 front door courtesy light switch assembly RH connector.

    2. Disconnect the F76 main 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 - F76-19 (FRCY) Always Below 1 Ω
      K2-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY


    1. Remove the rear door courtesy light switch assembly.

      Click here

    2. Inspect the rear door courtesy light switch assembly.

      Click here


    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY - MAIN BODY ECU)


    1. Disconnect K3 or K4 rear door courtesy light switch assembly connector.

    2. Disconnect the F76 or F141 main body ECU connector.

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

      Standard Resistance
      LH
      Tester Connection Condition Specified Condition
      K3-1 - F141-5 (LCTY) Always Below 1 Ω
      K3-1 - Body ground Always 10 kΩ or higher
      RH
      Tester Connection Condition Specified Condition
      K4-1 - F76-6 (RCTY) Always Below 1 Ω
      K4-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH)


    1. Remove the back door lock assembly (back door courtesy switch).

      Click here

    2. Inspect the back door lock assembly (back door courtesy switch).

      Click here


    NG

    REPLACE BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH) Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)


    1. Disconnect the P12 back door lock assembly (back door courtesy switch) connector.

    2. Disconnect the 3D 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
      P12-3 (D+) - 3D-35 Always Below 1 Ω
      P12-3 (D+) - Body ground Always 10 kΩ or higher
      P12-2 (ACT-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

    2. Remove the main body ECU from the instrument panel junction block assembly.

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

      A004ATOC01
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-35 - MB-20 (BCTY) Always Below 1 Ω

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY