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

DESCRIPTION

WIRING DIAGRAM

PROCEDURE

1. CHECK VEHICLE SIGNAL

   1. 

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

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

      OK

      Parking Brake Position	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 change in the switch.

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

   (Click here)

2. INSPECT PARKING BRAKE SWITCH ASSEMBLY

   1. 

      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 - Switch body	On (Shaft is not pressed)	Below 1 Ω
      	Off (Shaft is pressed)	10 kΩ or higher

      Table 1. Text in Illustration

      	On
      	Off

   REPLACE PARKING BRAKE SWITCH ASSEMBLY

   (Click here)

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

   1. Disconnect the H105 radio and display receiver assembly 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
      H105-15 (PKB) - H17-1	Always	Below 1 Ω
      H105-15 (PKB) - Body ground	Always	10 kΩ or higher

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

   (Click here)

   REPAIR OR REPLACE HARNESS OR CONNECTOR