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

INSPECTION PROCEDURE

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

      Tech Tips

      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.

   
   

   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. 

      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

      Text in Illustration

      	On
      	Off

   
   

   NG

   REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

   OK

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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