Inspection Procedure

HINT:

When C1425 is output together with C1429, inspect and repair the trouble areas indicated by C1425 first (See DTC C1425 OPEN IN STOP LIGHT SWITCH CIRCUIT ).

1. READ VALUE USING TECHSTREAM (BRAKE PEDAL LOAD SENSING SWITCH) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Select the Data List mode on the Techstream (See DATA LIST / ACTIVE TEST ).

      ABS/VSC/TRAC: 

      ABS/VSC/TRAC REFERENCE CHART
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Brake Pedal Load Sensing SW	Brake pedal load sensing switch / ON or OFF	ON: Brake pedal depressed beyond the specified point OFF: Brake pedal not depressed beyond the specified point	-

   4. Check that the brake pedal load sensing switch display observed on the Techstream changes according to brake pedal operation.

   OK: The Techstream displays ON or OFF according to brake pedal operation. 

   NG : Go to step  3

   OK : Go to Next Step 

2. RECONFIRM DTC 
   1. Turn the ignition switch off.
   2. Clear the DTCs (See DTC CHECK / CLEAR ).
   3. Start the engine.
   4. Perform the road and braking test.
   5. Check if the same DTC is output (See DTC CHECK / CLEAR ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC (C1429) is not output.	A
   DTC (C1429) is output.	B

   B : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )

   A : CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

3. INSPECT BRAKE PEDAL LOAD SENSING SWITCH 
   Fig 1: Identifying Brake Pedal Load Steering Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • Do not remove the brake pedal load sensing switch from the brake pedal support assembly.
   • When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal support assembly.
   1. Turn the ignition switch off.
   2. Make sure that there is no looseness in the locking part and connecting part of the connector.
   3. Disconnect the brake pedal load sensing switch connector.
   4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   2 (FSW+) - 1 (FSW-)	Brake pedal load sensing switch off (Brake pedal depressed)	0.9 to 1.1 kΩ
   	Brake pedal load sensing switch on (Brake pedal released)	192 to 234 Ω

   NG : REPLACE BRAKE PEDAL SUPPORT ASSEMBLY (BRAKE PEDAL LOAD SENSING SWITCH)  (See REMOVAL )

   OK : Go to Next Step 

4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH) 
   1. Make sure that there is no looseness in the locking part and connecting part of the connector.
   2. Disconnect the skid control ECU connector.
   3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A19-27 (FSW+) - A2-2 (FSW+)	Always	Below 1 Ω
   A19-27 (FSW+) - Body ground	Always	10 kΩ or higher
   A2-1 (FSW-) - Body ground	Always	Below 1 Ω

   NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 2: Identifying Skid Control ECU And Brake Pedal Load Steering Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )