Inspection Procedure

HINT:

Start the inspection from step 1 when using the intelligent tester and start from step 2 when not using the intelligent tester.

1. READ VALUE OF INTELLIGENT TESTER 
   1. Connect the intelligent tester to the DLC3.
   2. Start the engine.
   3. Select the DATA LIST mode on the intelligent tester.
   4. Read the value of the brake pedal load sensing switch displayed on the intelligent tester when depressing and releasing the brake pedal.
   DATA LIST REFERENCE CHART
   
   

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

   OK 

   CONDITION DISPLAY
   
   

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

   NG: Go to step   3 

   OK: Go to next step 

2. RECONFIRM DTC OUTPUT 
   1. Check if other DTCs are recorded. (See DIAGNOSTIC TROUBLE CODE CHART  )

   Result 

   RESULT REFERENCE CHART
   
   

   Result	Proceed to
   DTCs are output	A
   DTCs are not output	B

   B: Go to step 3 

   A: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

3. INSPECT BRAKE PEDAL SUB-ASSEMBLY 
   NOTE: Do not disassemble the brake pedal sub-assembly.

   HINT:

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

   1. Disconnect the brake pedal load sensing switch connector B8.
   2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition Specified	Condition
   B8-2 (FSW+) - B8-1 (GND)	Depress brake pedal	Approx. 1000 Ω
   	Release brake pedal	Approx. 213 Ω

   Fig 1: Inspecting Brake Pedal Sub-Assembly

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   NG: REPAIR OR REPLACE BRAKE PEDAL SUBASSEMBLY 

   OK: Go to next step 

4. CHECK HARNESS OR CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH) 
   1. Disconnect the skid control ECU connector S1 and the brake pedal load sensing switch connector B8.
   2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      S1-7 (FSW+) - B8-2 (FSW)	Below 1 Ω

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

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S1-7 (FSW+) - Body ground	10 kΩ or higher

   Fig 2: Identifying Skid Control ECU Connector Terminals

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ABS AND TRACTION ACTUATOR