NAVIGATION SYSTEM(for HDD) Parking Brake Switch Circuit

DESCRIPTION

WIRING DIAGRAM

PROCEDURE

1. CHECK PARKING BRAKE SWITCH ASSEMBLY (DISPLAY CHECK MODE)

   1. 

      Enter the "Display Check" mode and select "Vehicle Signal Check"

      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

      Tip:

      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

      Result
      OK
      NG

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

   Click here

   NG

2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - PARKING BRAKE SWITCH)

   1. Disconnect the H4 display and navigation module display connector.

   2. Disconnect the A39 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
      H4-17 (PKB) - A39-1	Always	Below 1 Ω
      H4-17 (PKB) - Body ground	Always	10 kΩ or higher

      Result

      Result
      OK
      NG

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT PARKING BRAKE SWITCH ASSEMBLY

   1. 

      *a	Released
      *b	Pushed in

      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	Condition	Specified Condition
      1 - Switch body	Parking brake switch on (Switch pin released)	Below 1 Ω
      	Parking brake switch off (Switch pin pushed in)	10 kΩ or higher

      Result

      Result
      OK
      NG

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

   Click here

   NG

   REPLACE PARKING BRAKE SWITCH ASSEMBLY

   Click here