VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1429
DTC Code | DTC Name |
---|---|
C1429 | Open or Short in Brake Pedal Load Sensing Switch |
DESCRIPTION
The brake pedal load sensing switch turns on when the brake pedal is depressed with a force exceeding a predetermined level. The skid control ECU (brake actuator assembly) uses this circuit to detect if the brake pedal is depressed or not. (for 1AD-FTV)
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1429 |
Open or Short in Brake Pedal Load Sensing Switch |
An open or short in the brake pedal load sensing switch circuit continues for 0.5 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the skid control ECU (brake actuator assembly), perform system variant learning.
When C1249, C1425 and/or C1426 is output together with C1429, inspect and repair the trouble areas indicated by C1249, C1425 and/or C1426 first.
for C1249:Click here
for C1425:Click here
for C1426:Click here
PROCEDURE
READ VALUE USING GTS (BRAKE PEDAL LOAD SENSING SWITCH)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Select the Data List using the GTS.
Chassis > ABS/VSC/TRC > Data List
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
-
Chassis > ABS/VSC/TRC > Data List
Tester Display
Brake Pedal Load Sensing SW
Check that the brake pedal load sensing switch display observed on the GTS changes according to brake pedal operation.
OK
The GTS displays ON or OFF according to brake pedal operation.
Result
Proceed to
OK
NG
NG INSPECT BRAKE PEDAL LOAD SENSING SWITCHClick here
RECONFIRM DTC
Turn the ignition switch off.
Clear the DTCs.
Chassis > ABS/VSC/TRC > Clear DTCs
Turn the ignition switch off.
Start the engine.
Perform a road test.
Check if the same DTC is output.
Chassis > ABS/VSC/TRC > Trouble Codes
Result
Result
Proceed to
DTC C1429 is not output.
A
DTC C1429 is output.
B
INSPECT BRAKE PEDAL LOAD SENSING SWITCH
*a
Component without harness connected
(Brake Pedal Load Sensing Switch (Brake Pedal Support Assembly))
Turn the ignition switch off.
Make sure that there is no looseness at the locking part and the connecting part of the connector.
Disconnect the A111 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.
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
Proceed to
OK
NG
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - BRAKE PEDAL LOAD SENSING SWITCH)
Make sure that there is no looseness at the locking part and the connecting part of the connector.
Disconnect the A97 skid control ECU (brake actuator assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
A97-34 (FSW+) - A111-2 (FSW+)
Always
Below 1 Ω
A97-34 (FSW+) or A111-2 (FSW+) - Body ground
Always
10 kΩ or higher
A111-1 (FSW-) - Body ground
Always
Below 1 Ω
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR