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

A01JDCAE04

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the display on the intelligent tester.

      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. A01JC9HE04

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - Switch body Shaft pushed in (OFF) 10 kΩ or higher
      1 - Switch body Shaft not pushed in (ON) Below 1 Ω

    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 (SWITCH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


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

    2. Disconnect the A25 parking brake switch assembly connector.

    3. 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. A01JAEWE08
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly.

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

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

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