LIGHTING SYSTEM Parking Brake Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch assembly.

WIRING DIAGRAM

A0043P0E07

INSPECTION PROCEDURE

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 display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Parking Brake SW Parking brake switch signal/ON or OFF

      ON: Parking brake switch on

      OFF: Parking brake switch off

      		 -
      OK
      Normal conditions listed above are displayed.

    NG

    INSPECT PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

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

  2. INSPECT PARKING BRAKE SWITCH ASSEMBLY


    1. Remove the parking brake switch assembly Click here for LHD, Click here for RHD).

    2. Inspect the parking brake switch assembly Click here for LHD, Click here for RHD).

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE PARKING BRAKE SWITCH ASSEMBLY (for LHD) Click here

    C

    REPLACE PARKING BRAKE SWITCH ASSEMBLY (for RHD) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2C 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
      A25-1 - 2C-20 Always Below 1 Ω
      A25-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A0043OAE30
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2C-20 - MB-12 (PKB) Always Below 1 Ω
      2C-20 - Body ground Always 10 kΩ or higher

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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