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 using this circuit.

WIRING DIAGRAM

A01G9QJE02

INSPECTION PROCEDURE

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Door Courtesy SW Front door courtesy light switch RH signal/ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

      		 -
      FL Door Courtesy SW 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

    B

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) 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. Remove the front door courtesy light switch assembly Click here.

    2. Inspect the front door courtesy light switch assembly Click here.

      OK
      Front door courtesy light switch assembly is normal.
      Result
      Result Proceed to
      OK (for Front LH) A
      OK (for Front RH) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (FOR RH) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    C

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the 3C instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P3-1 - 3C-15 Always Below 1 Ω
      P3-1 - 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 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.

      A01G72UE08
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3C-15 - MB-2 (FLCY) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (FOR RH) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3B instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q7-1 - 3B-14 Always Below 1 Ω
      Q7-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    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.

      A01G4NAE08
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-14 - MB-4 (FRCY) Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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