LIGHTING SYSTEM Parking Brake Switch Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) detects the condition of the parking brake switch.

WIRING DIAGRAM

A01EM78E09

INSPECTION PROCEDURE

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.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Parking Brake SW Parking brake SW 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. A01EMA1E04

      Remove the parking brake switch assembly Click here.

    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

    NG

    REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SWITCH - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY))


    1. A01EKZ5E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))
      *2

      Front view of wire harness connector

      (to Parking Brake Switch Assembly)

      Disconnect the 2C main body ECU (driver side junction block assembly) connector.

    2. Disconnect the L15 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
      2C-7 - L15-1 Always Below 1 Ω
      2C-7 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here