LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A003UK9E01

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 switch signal/ON or OFF

      ON: Back door open

      OFF: Back door closed

      		 -
      FR Door Courtesy Front door courtesy light switch RH signal/ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

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

      ON: Front door LH open

      OFF: Front door LH closed

      		 -
      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 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. A003RL3E01
      Text in Illustration
      *1

      Component without harness connected

      (Front Door Courtesy Light Switch Assembly)
      *2 Switch Body

      Remove the front door courtesy light switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Pushed 10 kΩ or higher
      1 - Switch body 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 L3 front door courtesy light switch assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2D-35 - L3-1 Always Below 1 Ω
        2D-35 - Body ground Always 10 kΩ or higher

    2. for Front RH


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

      2. Disconnect the M1 front door courtesy light switch assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2B-31 - M1-1 Always Below 1 Ω
        2B-31 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A003RQOE03
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      for Front LH


      1. Remove the instrument panel junction block assembly.

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

        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. A003RW0E13
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      for Front RH


      1. Remove the instrument panel junction block assembly.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2B-31 - A-4 (FRCY) Always Below 1 Ω
        2B-31 - Body ground Always 10 kΩ or higher

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


    1. A003RL3E01
      Text in Illustration
      *1

      Component without harness connected

      (Rear Door Courtesy Light Switch Assembly)
      *2 Switch Body

      Remove the rear door courtesy light switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Switch body Pushed 10 kΩ or higher
      1 - Switch body 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 E120 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the L5 rear door courtesy light switch assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E120-23 (LCTY) - L5-1 Always Below 1 Ω
        E120-23 (LCTY) - Body ground Always 10 kΩ or higher

    2. for Rear RH


      1. Disconnect the E120 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the M3 rear door courtesy light switch assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E120-6 (RCTY) - M3-1 Always Below 1 Ω
        E120-6 (RCTY) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

  7. INSPECT BACK DOOR LOCK ASSEMBLY


    1. A003UBME29
      Text in Illustration
      *1

      Component without harness connected

      (Back Door Lock Assembly)
      *2 Lock
      *3 Unlock

      Remove the back door lock assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 (ACT-) - 3 (D+) Locked 10 kΩ or higher
      1 (ACT-) - 3 (D+) Unlocked Below 1 Ω

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

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


    1. Disconnect the E120 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the R3 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
      E120-19 (BCTY) - R3-3 (D+) Always Below 1 Ω
      E120-19 (BCTY) - Body ground Always 10 kΩ or higher
      R3-1 (ACT-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)