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

DESCRIPTION

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

WIRING DIAGRAM

*a	Parking Brake Switch Assembly
*b	Radio and Display Receiver Assembly

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK VEHICLE SIGNAL (OPERATION CHECK)

   
   

   1. 

      Display the "Vehicle Signal Check Mode" screen.

      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.

      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.

      Click here

   2. Inspect the parking brake switch assembly.

      Click here

      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