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

*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 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.

   
   

   OK

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

   NG

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

   
   

   1. Disconnect the E53 parking brake switch assembly connector.

   2. Disconnect the F120 radio and display receiver assembly connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition F120-15 (PKB) - E53-1 Always Below 1 Ω F120-15 (PKB) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

      Text in Illustration

      	On
      	Off

   
   

   OK

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   NG

   REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here