Inspection Procedure

1. Connect the hand-held tester to the DLC3.
2. Start the engine.
3. Select the DATA LIST mode on the hand-held tester.
4. Read the value of the brake pedal load sensing switch displayed on the hand-held tester when depressing and releasing the brake pedal.
   VEHICLE CONDITION / TEST DETAILS CHART
   
   

   Item	Vehicle Condition / Test Details	Diagnostic Note
   BRAKE WRN LIGHT	Brake load sensing switch / ON or OFF	ON: Depressed pedal
   BRAKE WRN LIGHT	Brake load sensing switch / ON or OFF	Released pedal brake

   OK: 

   CONDITION DISPLAY CHART
   
   

   Condition	Display
   Depress the brake pedal	ON
   Release the brake pedal	OFF

1. OK: Go to step   4 . 
2. NG: GO TO NEXT STEP. 

HINT:

Replace the brake pedal sub-assy when there is a malfunction in the brake pedal load sensing switch.

1. Disconnect the brake pedal load sensing switch connector B13.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   SPECIFICATION TESTER CONNECTION
   
   

   Tester Connection	Condition	Specified Condition
   B13-2 (FSW+) - B13-1 (GND)	Depress brake pedal	Approx. 1000 Ω
   B13-2 (FSW+) - B13-1 (GND)	Release brake pedal	Approx. 213 Ω

   Fig 1: Disconnecting Brake Pedal Load Sensing Switch Connector B13

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE BRAKE PEDAL SUB-ASSY (See  BRAKE CONTROL PEDAL ASSY  ) 
2. OK: GO TO NEXT STEP. 

1. Disconnect the skid control ECU connector S27 and the brake pedal load sensing switch connector B13.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   SPECIFICATION TESTER CONNECTION
   
   

   Tester Connection	Specified Condition
   S27-7 (FSW+) - B13-2 (FSW)	Below 1 Ω

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

   Standard: 

   SPECIFICATION TESTER CONNECTION
   
   

   Tester Connection	Specified Condition
   S27-7 (FSW+) - Body ground	10 kΩ or higher

   Fig 2: Checking Harness And Connector (Brake Pedal Load Sensing Switch - Skid Control ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: GO TO NEXT STEP. 

1. Disconnect the skid control ECU connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard: 

   SPECIFICATION TESTER CONNECTION
   
   

   Tester Connection	Switch condition	Specified Condition
   S27-27 (STP) -Body ground	Brake pedal depressed	8 to 14 V
   S27-27 (STP) -Body ground	Brake pedal released	Below 1 V

   Fig 3: Checking Skid Control ECU Terminal Voltage (STP Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: INSPECT STOP LAMP SWITCH CIRCUIT 
2. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (See  REPLACEMENT  )