Inspection Procedure

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. 

OK:  Go to step  3

NG: Go to next step. 

1. Disconnect the parking brake switch.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   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

Fig 1: Measuring Resistance Between Parking Brake Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH 

OK: Go to next step. 

1. Disconnect the navigation receiver assembly connector R12 and parking brake switch connector P6.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   PKB - P6-1 (A/T)	Always	Below 1 Ω
   PKB - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Navigation Receiver Assembly And Parking Brake Switch Connector R12 P6
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE