AUDIO AND VISUAL SYSTEM (for Radio and Display Type) Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake switch assembly to the radio and display receiver assembly.

WIRING DIAGRAM

A01DY04E21

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK PARKING BRAKE SWITCH ASSEMBLY


    1. A01E0GW

      Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Touch Switch in Operation Check Click here]

    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

      Tech Tips

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


    NG

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY) Click here

    OK

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

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


    1. Disconnect the R21 radio and display receiver assembly connector.

    2. Disconnect the P2 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
      R21-15 (PKB) - P2-1 Always Below 1 Ω
      R21-15 (PKB) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT PARKING BRAKE SWITCH ASSEMBLY


    1. A01DWR1

      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
      Switch connector - Switch body On (Shaft is not pressed) Below 1 Ω
      Off (Shaft is pressed) 10 kΩ or higher
      Text in Illustration
      A01E2TX On
      A01DZ8Z Off

    NG

    REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

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