TOYOTA PARKING ASSIST-SENSOR SYSTEM Parking Brake Switch Circuit

DESCRIPTION

This circuit includes the parking brake switch and the clearance warning ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARKING BRAKE SWITCH)

   
   

   1. Disconnect the H95 clearance warning ECU 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 H95-6 (PKB) - H17-1 Always Below 1 Ω H95-6 (PKB) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT PARKING BRAKE SWITCH ASSEMBLY

   
   
   1. 

      Text in Illustration

      *a	ON
      *b	OFF

      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

   
   

   NG

   REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

   OK

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