LIGHTING SYSTEM Back Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) receives a back door open/closed signal from back door lock assembly (back door courtesy light switch).

WIRING DIAGRAM

A003LL8E04

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
      Back Door Courtesy SW Back door courtesy switch signal OFF or ON

      OFF: Back door closed

      ON: Back door open

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Back Door Courtesy SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)


    1. Remove the back door lock assembly (back door courtesy light switch).

      Click here

    2. Inspect the back door lock assembly (back door courtesy light switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)


    1. Disconnect the 3H 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
      R14-3 (D+) - 3H-34 Always Below 1 Ω
      R14-3 (D+) or 3H-34 - Body ground Always 10 kΩ or higher
      R14-2 (ACT-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    A003OHNC38
    *a

    Component without harness connected

    (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.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3H-34 - MB-4 (BCTY) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here