DTC C1430: Brake Pedal Load Sensing Switch OFF Stuck Malfunction; DTC C1431: Brake Pedal Load Sensing Switch ON Stuck Malfunction [08/2015 - 08/2019]: Procedure

1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
   ABS/VSC/TRAC
   
   

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

6. Check that the stop light switch display and brake pedal load sensing switch display observed on the Techstream change according to the brake pedal operation.

   OK

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

7. Slowly depress the brake pedal and check when the stop light switch and brake pedal load sensing switch turn ON.

   OK

   The stop light switch turns on first, and then the brake pedal load sensing switch turns on.

   RESULT
   
   

   Result		Proceed to
   OK		A
   NG	Turning on of brake pedal load sensing switch is not confirmed	B
   	Brake pedal load sensing switch turns on first	C

Result: 

B 

See step  3

Result: 

C 

See step  5

Result: 

A 

See step  2

1. Turn the ignition switch off.
2. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
3. Start the engine.
4. Perform a road and braking test.
5. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
   RESULT
   
   

   Result	Proceed to
   DTCs C1430 and C1431 are not output	A
   DTCs C1430 and/or C1431 are output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

B 

REPLACE BRAKE ACTUATOR ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

See step  3

Result: 

NG 

REPLACE BRAKE WITH SWITCH PEDAL SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  4

See step  4

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Turn the ignition switch off.
2. Check the brake pedal height and stop light switch installation (Refer to ADJUSTMENT [08/2015 - ] ).

   OK

   The brake pedal height and stop light switch installation are normal.

Result: 

OK 

REPLACE BRAKE WITH SWITCH PEDAL SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH 

(Refer to ADJUSTMENT [08/2015 - ] )