DTC C1429: Open or Short in Brake Pedal Load Sensing Switch [08/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Select the Data List using the Techstream. Refer to DATA LIST / ACTIVE TEST [08/2015 - ] .
   ABS/VSC/TRAC
   
   

   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 a specified point OFF: Brake pedal not depressed beyond a 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 → See step   3 

OK: Go to next step 

1. Turn the ignition switch off.
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2015 - ] .
3. Turn the ignition switch off.
4. Start the engine.
5. Perform a road test.
6. Check if the same DTC is output. Refer to DTC CHECK / CLEAR [08/2015 - ] .

   Result

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

B → See step   7 

A → See step   5 

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
3. Disconnect the brake pedal load sensing switch connector.
   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.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (FSW+) - 1 (FSW-)	Switch OFF (Brake pedal depressed)	950 to 1050 Ω
   2 (FSW+) - 1 (FSW-)	Switch ON (Brake pedal released)	203 to 223 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Brake Pedal Load Sensing Switch (Brake Pedal Support Assembly))

NG → See step   6 

OK: Go to next step 

1. Make sure that there is no looseness at the locking part and the 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	Condition	Specified Condition
   A49-34 (FSW+) - A40-2 (FSW+)*1 A94-34 (FSW+) - A40-2 (FSW+)*2	Always	Below 1 Ω
   A49-34 (FSW+) - Body ground*1 A94-34 (FSW+) - Body ground*2	Always	10 kΩ or higher
   A40-1 (FSW-) - Body ground	Always	Below 1 Ω

   *1: for 2AR-FE (w/o Dynamic Radar Cruise Control System)

   *2: for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7