LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

B000UHZE02
*a Courtesy Light Switch RH
*b Courtesy Light Switch LH
*c Main Body ECU (Multiplex Network Body ECU)

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. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Courtesy SW Courtesy light switch RH signal OFF or ON

      OFF: Front door RH closed

      ON: Front door RH open

      		 -
      FL Door Courtesy SW Courtesy light switch 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
      NG ("FR Door Courtesy SW" is abnormal) B
      NG ("FL Door Courtesy SW" is abnormal) C

    A

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

    C

    INSPECT COURTESY LIGHT SWITCH LH Click here

    B

  2. INSPECT COURTESY LIGHT SWITCH RH


    1. Remove the courtesy light switch RH.

      Click here

    2. Inspect the courtesy light switch RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COURTESY LIGHT SWITCH RH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COURTESY LIGHT SWITCH RH - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the X25 courtesy light switch RH connector.

    2. Disconnect the P7 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
      X25-1 - P7-6 (FRCY) Always Below 1 Ω
      X25-1 or P7-6 (FRCY) - 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 COURTESY LIGHT SWITCH LH


    1. Remove the courtesy light switch LH.

      Click here

    2. Inspect the courtesy light switch LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COURTESY LIGHT SWITCH LH Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (COURTESY LIGHT SWITCH LH - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the X57 courtesy light switch LH connector.

    2. Disconnect the P7 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
      X57-1 - P7-1 (FLCY) Always Below 1 Ω
      X57-1 or P7-1 (FLCY) - 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