DTC C1430: Brake Pedal Load Sensing Switch OFF Stuck Malfunction; DTC C1431: Brake Pedal Load Sensing Switch ON Stuck Malfunction [12/2013 - 11/2016]: 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 [12/2013 - 11/2016]

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop light switch assembly	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 a specified point OFF: Brake pedal not depressed beyond a specified point	-

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display
   Stop Light SW
   Brake Pedal Load Sensing SW

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

   OK

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

5. Slowly depress the brake pedal, and check when the stop light switch assembly and brake pedal load sensing switch turn on.

   OK

   First the stop light switch assembly should turn on, and then the brake pedal load sensing switch should turn on.

   Result	Proceed to
   OK	A
   NG (Turning on of the brake pedal load sensing switch is not confirmed.)	B
   NG (The brake pedal load sensing switch turns on first.)	C

Result:

B 

See step  3

Result:

C 

See step  5

Result:

A 

Go to next step 

1. Turn the ignition switch off.
2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

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 [12/2013 - 11/2016]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   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 [12/2013 - 11/2016]

Result:

B 

REPLACE BRAKE ACTUATOR ASSEMBLY. 

Refer to REMOVAL [12/2013 - 11/2016]

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
3. Disconnect the A55 brake pedal load sensing switch (brake pedal support assembly) 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	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

Result:

NG 

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY. 

Refer to REMOVAL [12/2013 - ]

Result:

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 A47 skid control ECU (brake actuator assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-27 (FSW+) - A55-2 (FSW+)	Always	Below 1 Ω
   A47-27 (FSW+) or A55-2 (FSW+) - Body ground	Always	10 kΩ or higher
   A55-1 (FSW-) - Body ground	Always	Below 1 Ω

Result:

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. 

Refer to REMOVAL [12/2013 - 11/2016]

Result:

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Turn the ignition switch off.
2. Check the brake pedal height and stop light switch assembly installation.

   Refer to ADJUSTMENT [12/2013 - ]

   OK

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

Result:

OK 

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY. 

Refer to REMOVAL [12/2013 - ]

Result:

NG 

ADJUST BRAKE PEDAL HEIGHT OR STOP LIGHT SWITCH ASSEMBLY INSTALLATION. 

Refer to ADJUSTMENT [12/2013 - ]