NAVIGATION SYSTEM(for Radio and Display Type) Parking Brake Switch Circuit

DTC Code DTC Name
Parking Brake Switch Circuit

DESCRIPTION

This circuit includes the parking brake switch assembly and radio and display receiver assembly.

WIRING DIAGRAM

E280960E05

CAUTION / NOTICE / HINT

Note:

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

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PROCEDURE

  1. CHECK VEHICLE SIGNAL (OPERATION CHECK)

    1. E278090

      Display the "Vehicle Signal Check Mode" screen.

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    2. Check that the display changes between ON and OFF according to the parking brake operation.

      OK

      Parking Brake Condition

      Display

      Applied

      ON

      Released

      OFF
      Tip:

      This display is updated once per second. As a result, it is normal for the display to lag behind the actual parking brake operation.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY)

    1. Disconnect the G143 radio and display receiver assembly connector.

    2. Disconnect the G37 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

      G143-15 (PKB) - G37-1

      Always

      Below 1 Ω

      G143-15 (PKB) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT PARKING BRAKE SWITCH ASSEMBLY

    1. Remove the parking brake switch assembly.

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    2. Inspect the parking brake switch assembly.

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    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPLACE PARKING BRAKE SWITCH ASSEMBLY

    Click here