NAVIGATION SYSTEM (for HDD) Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake switch assembly to the navigation computer sub-assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK BRAKE WARNING LIGHT

   
   

   1. Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.

      OK
      The brake warning light operates as specified above.

   
   

   NG

   INSPECT PARKING BRAKE SWITCH ASSEMBLY Click here

   OK

2. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the H60 navigation computer sub-assembly connector.

   2. Disconnect the A24 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 H60-17 (PKB) - A24-1 Always Below 1 Ω H60-17 (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

3. INSPECT PARKING BRAKE SWITCH ASSEMBLY

   
   

   1. 

      Disconnect the parking brake switch assembly connector.

   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 (When shaft is not pressed) Below 1 Ω Switch connector - Switch body OFF (When shaft is pressed) 10 kΩ or higher

   3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to OK A NG (for LHD) B NG (for RHD) C

   
   

   B

   REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

   C

   REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR