THEFT DETERRENT SYSTEM Door Courtesy Switch Circuit

DESCRIPTION

The theft body ECU receives a door open or closed signal from front door courtesy light switch and combination meter assembly.

WIRING DIAGRAM

B0026H6E03

CAUTION / NOTICE / HINT

Note


  • w/ Door Control Battery:

    As the door control battery is installed between the vehicle battery and body ECU, first perform the inspections to confirm that there are no malfunctions in the power source circuit for the body ECU before performing this troubleshooting procedure.

    Click here

  • w/ Automatic Light Control System:

    If the body ECU has been replaced, it is necessary to initialize the body ECU.

    Click here

PROCEDURE


  1. CHECK METER / GAUGE SYSTEM


    1. Check the meter / gauge system (door courtesy switch) is functioning normally.

      Click here

      Result
      Result
      OK
      NG

    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  2. CHECK FRONT DOOR COURTESY SWITCH CIRCUIT


    1. Remove the body ECU.


    2. Connect the instrument panel junction block assembly connector.

    3. Disconnect the G10 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-18 (DCTY) - Body ground Driver side door closed (OFF) → Open (ON) 10 kΩ or higher → Below 1 Ω
      G27-14 (PCTY) - Body ground Front passenger side door closed (OFF) → Open (ON) 10 kΩ or higher → Below 1 Ω
      Result
      Proceed to
      OK
      NG (for Driver Side, LHD)
      NG (for Driver Side, RHD)
      NG (for Front Passenger Side)

    NG (for Driver Side, LHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG (for Driver Side, RHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG (for Front Passenger Side)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DOOR COURTESY SWITCH SIGNAL (ACTY)


    1. B002787C01
      *a

      Component with harness connected

      (Instrument Panel Junction Block Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2Q-2 - Body ground All doors closed except driver door → Any door open except driver door 11 to 14 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BODY ECU)


    1. Remove the body ECU.


    2. Connect the instrument panel junction block assembly connectors.

    3. Disconnect the G10 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G10-12 (DOOR) - A-21 (ACTY) Always Below 1 Ω
      G10-12 (DOOR) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

  5. CHECK BODY ECU


    1. Disconnect the combination meter assembly connector.

    2. B0027CYC02
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G10-12 (DOOR) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG (for LHD)
      NG (for RHD)

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG (for LHD)

    REPLACE BODY ECU Click here

    NG (for RHD)

    REPLACE BODY ECU Click here

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2Q instrument panel junction block assembly connector.

    2. Disconnect the G10 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G10-12 (DOOR) - 2Q-2 Always Below 1 Ω
      G10-12 (DOOR) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK (for LHD)
      OK (for RHD)
      NG

    OK (for LHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK (for RHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR