LIGHTING SYSTEM Front Door Courtesy Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A003K96E01

CAUTION / NOTICE / HINT

Note

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power 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
      FR Door Courtesy SW Front door courtesy light switch assembly RH signal OFF or ON

      OFF: Front door RH closed

      ON: Front door RH open

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

      OFF: Front door LH closed

      ON: Front door LH open

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Courtesy SW
      FL Door Courtesy SW
      OK
      Normal conditions listed above are displayed.
      Result
      Result Proceed to
      OK A
      "FR Door Courtesy SW" is not normal B
      "FL Door Courtesy SW" is not normal C

    A

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

    C

    INSPECT FRONT 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. for LHD


      1. Disconnect the I18 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the J5 courtesy light assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N43-1 - I18-27 (FRCY) Always Below 1 Ω
        N43-1, I18-27 (FRCY) or J5-1 (B) - Body ground Always 10 kΩ or higher

    2. for RHD


      1. Disconnect the I18 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the J5 courtesy light assembly RH connector.

      3. Disconnect the A32 skid control ECU (brake booster with master cylinder assembly) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N43-1 - I18-27 (FRCY) Always Below 1 Ω
        N43-1, I18-27 (FRCY), J5-1 (B) or A32-24 (CTY) - 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

  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. for LHD


      1. Disconnect the I18 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the K5 courtesy light assembly LH connector.

      3. Disconnect the A32 skid control ECU (brake booster with master cylinder assembly) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N6-1 - I18-6 (FLCY) Always Below 1 Ω
        N6-1, I18-6 (FLCY), K5-1 (B) or A32-24 (CTY) - Body ground Always 10 kΩ or higher

    2. for RHD


      1. Disconnect the I18 main body ECU (multiplex network body ECU) connector.

      2. Disconnect the K5 courtesy light assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N6-1 - I18-6 (FLCY) Always Below 1 Ω
        N6-1, I18-6 (FLCY) or K5-1 (B) - 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