LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door courtesy light switch.

WIRING DIAGRAM

A003XZYE02

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the display on the intelligent tester.

      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

      		 -
      Back Door Courtesy SW Back door courtesy light switch signal/ON or OFF

      ON: Back door open

      OFF: Back door closed

      		 -
      FR Door Courtesy Front door RH condition signal/ON or OFF

      ON: Front door RH closed

      OFF: Front door RH open

      		 -
      FL Door Courtesy Front door LH condition 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
      Front door courtesy light switch LH or RH does not operate B
      Rear door courtesy light switch LH or RH does not operate C
      Back door courtesy light switch does not operate D

    B

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) Click here

    C

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) Click here

    D

    INSPECT BACK DOOR LOCK ASSEMBLY Click here

    A

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

  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)


    1. A003WWXE02
      Text in Illustration
      *a

      Component without harness connected

      (Front Door Courtesy Light Switch Assembly)

      Disconnect the front door courtesy light switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Body ground Pushed 10 kΩ or higher
      1 - Body ground Not pushed Below 1 Ω

    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SWITCH)


    1. for Front LH


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

      2. Disconnect the P5 front door courtesy light switch assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        P5-1 - 2D-35 Always Below 1 Ω
        P5-1 - Body ground Always 10 kΩ or higher

    2. for Front RH


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

      2. Disconnect the Q3 front door courtesy light switch assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q3-1 - 2D-36 Always Below 1 Ω
        Q3-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. for Front LH


      1. Remove the instrument panel junction block assembly Click here.

      2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

        A003XPEE02
        Text in Illustration
        *a

        Component without harness connected

        (Instrument Panel Junction Block Assembly)

        		 *b

        Component without harness connected

        (Instrument Panel Junction Block Assembly)
        Standard Resistance
        Tester Connection Condition Specified Condition
        2D-35 - A-2 (FLCY) Always Below 1 Ω
        2D-35 - Body ground Always 10 kΩ or higher

    2. for Front RH


      1. Remove the instrument panel junction block assembly Click here.

      2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

        A003XPEE03
        Text in Illustration
        *a

        Component without harness connected

        (Instrument Panel Junction Block Assembly)

        		 *b

        Component without harness connected

        (Instrument Panel Junction Block Assembly)
        Standard Resistance
        Tester Connection Condition Specified Condition
        2D-36 - A-4 (FRCY) Always Below 1 Ω
        2D-36 - Body ground Always 10 kΩ or higher

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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

  5. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)


    1. A003WWXE02
      Text in Illustration
      *a

      Component without harness connected

      (Rear Door Courtesy Light Switch Assembly)

      Disconnect the rear door courtesy light switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Body ground Pushed 10 kΩ or higher
      1 - Body ground Not pushed Below 1 Ω

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR COURTESY LIGHT SWITCH)


    1. for Rear LH


      1. Disconnect the H18 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the P12 rear door courtesy light switch assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        P12-1 - H18-3 (LCTY) Always Below 1 Ω
        P12-1 - Body ground Always 10 kΩ or higher

    2. for Rear RH


      1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the Q7 rear door courtesy light switch assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q7-1 - H16-6 (RCTY) Always Below 1 Ω
        Q7-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  7. INSPECT BACK DOOR LOCK ASSEMBLY


    1. A003XDHE04
      Text in Illustration
      *a

      Component without harness connected

      (Back Door Lock Assembly)
      *b Lock
      *c Unlock

      Remove the back door lock assembly Click here.

    2. Check the operation of the door lock motor.


      1. Move the door lock to the lock position.

      2. Apply auxiliary battery voltage to the door lock motor and check the operation of the door lock motor.

        OK
        Connection Result

        Auxiliary battery positive (+) → Terminal 4 (ACT+)

        Auxiliary battery negative (-) → Terminal 3 (ACT-)

        		 Unlocks

    3. Check the operation of the door courtesy switch.


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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        1 (E) - 2 (+) Locked 10 kΩ or higher
        1 (E) - 2 (+) Unlocked Below 1 Ω

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - MAIN BODY ECU)


    1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the Q17 back door lock assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q17-2 (+) - H16-19 (BCTY) Always Below 1 Ω
      Q17-2 (+) - Body ground Always 10 kΩ or higher
      Q17-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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