DTC C0040-62

DTC C0040-62 : Brake Lamp Switch Failure (Stuck)

NOTE

Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the ABS, VSA, and brake system indicator (amber) come on, and continues until the indicator goes off.
Regular Diagnosis:
The regular on-board diagnosis begins right after the ABS, VSA, and brake system indicator (amber) go off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode.
Review "How to Troubleshoot the VSA System" before doing the DTC troubleshooting procedure.
Test-drive the vehicle according to local traffic conditions and regulations. Do not test-drive on a lift unless specified.
The possible causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

Confirmation Procedure	Basic Condition: No other DTCs detected Operating Condition: Start the engine. Test-drive the vehicle at 13 mph (20 km/h) or more for at least 6 minutes. Drive immediately at speed of 25 mph (40 km/h) or more, then press the brake pedal and stop the vehicle. Repeat steps 2 - 3 for three times.(Drive the vehicle on the road, not on a lift. Be careful of the surrounding traffic conditions.)
Execution	Regular Diagnosis
Duration	About 1 second
DTC Type	1 drive cycle VSA indicator on
Fail Safe Action	Stop engine drag torque control function Stop TCS function Stop VSA function Stop agile handling assist function Stop brake assist function Stop hill start assist function Stop automatic brake hold control function Stop starting assist brake function* 1 Stop ACC function* 2 Stop CMBS function* 2 Stop parking cooperation assist function* 3 Stop hydraulic boost failure compensation function* 4
Possible Cause	Brake pedal height incorrect position Open or Poor connection between the PCM and the brake pedal position switch (STOP SW line) Open or Poor connection between the brake pedal position switch and the under-hood fuse/relay box (+B STOP line) Brake pedal position switch failure PCM internal circuit failure (Brake pedal position switch stuck ON) VSA modulator-control unit internal failure

*1: With auto idle stop system

*2: With ACC

*3: 9-speed A/T

*4: 2021-23