LIGHTING SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (network gateway ECU) detects the condition of the front door courtesy light switch assembly using this circuit.

WIRING DIAGRAM

A004HN4E05

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the display on the GTS.

      OK
      Normal conditions listed above are displayed.
      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver side door courtesy light switch signal/ON or OFF

      ON: Driver side door closed

      OFF: Driver side door open

      		 -
      P Door Courtesy SW Passenger side door courtesy light switch signal/ON or OFF

      ON: Passenger side door closed

      OFF: Passenger side door open

      		 -
      Result
      Result Proceed to
      OK A
      Driver side door courtesy light switch or passenger side door courtesy light switch does not operate B

    A

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

    B

  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 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 LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3B (for RHD) or 3A (for LHD) instrument panel junction block assembly connector.

    2. Disconnect the H21 front door courtesy light switch assembly LH connector.

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

      Standard Resistance
      for RHD
      Tester Connection Condition Specified Condition
      H21-1 - 3B-13 Always Below 1 Ω
      H21-1 - Body ground Always 10 kΩ or higher
      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      H21-1 - 3A-28 Always Below 1 Ω
      H21-1 - 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 (network gateway ECU) from the instrument panel junction block assembly.

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

      A004JDQE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-13 - MB-10 (FPCY) Always Below 1 Ω

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

      A004HXXE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-28 - MB-16 (FDCY) Always Below 1 Ω

    OK

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

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


    1. Disconnect the 3A (for RHD) or 3B (for LHD) instrument panel junction block assembly connector.

    2. Disconnect the G18 front door courtesy light switch assembly RH connector.

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

      Standard Resistance
      for RHD
      Tester Connection Condition Specified Condition
      G18-1 - 3A-28 Always Below 1 Ω
      G18-1 - Body ground Always 10 kΩ or higher
      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G18-1 - 3B-13 Always Below 1 Ω
      G18-1 - 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 (network gateway ECU) from the instrument panel junction block assembly.

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

      A004HXXE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-28 - MB-16 (FDCY) Always Below 1 Ω

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

      A004JDQE01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-13 - MB-10 (FPCY) Always Below 1 Ω

    OK

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here