TOYOTA PARKING ASSIST-SENSOR SYSTEM Parking Brake Switch Circuit

DTC Code DTC Name
Parking Brake Switch Circuit

DESCRIPTION

This circuit includes the parking brake switch and the clearance warning ECU.

WIRING DIAGRAM

U123947E01

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARKING BRAKE SWITCH)

    1. Disconnect the H95 clearance warning ECU connector.

    2. Disconnect the H17 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

      H95-6 (PKB) - H17-1

      Always

      Below 1 Ω

      H95-6 (PKB) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  2. INSPECT PARKING BRAKE SWITCH ASSEMBLY

    1. C206778E02

      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

      Switch Condition

      Specified Condition

      Switch connector terminal - Switch body

      ON (Shaft not pressed)

      Below 1 Ω

      OFF (Shaft pressed)

      10 kΩ or higher
      Table 1. Text in Illustration

      *a

      ON

      *b

      OFF

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPLACE PARKING BRAKE SWITCH ASSEMBLY

    (Click here)