DTC C0040-62
DTC C0040-62
: Brake Light 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 indicator comes on, and continues until the indicator goes off.
- Regular Diagnosis:
The regular on-board diagnosis begins right after the ABS/VSA indicator goes 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:
With the Driving Pattern:
- Start the engine.
- Test-drive the vehicle at 13 mph (20 km/h) or more for more than 6 minutes.
- Drive immediately at speed of 25 mph (40 km/h) or more, then press the brake pedal and stop the vehicle. (Be careful of the surrounding traffic conditions.)
- Repeat Driving Pattern steps 2 through 3, 3 times.
|
| Execution |
Regular Diagnosis |
| Duration |
About 2 seconds |
| DTC Type |
- 1 drive cycle
- VSA indicator on
|
| Fail Safe Action |
- Stop VSA function
- Stop TCS function
- Stop engine drag torque control function
- Stop brake assist function
- Stop hill start assist function
- Stop trailer stability assist control function
- Stop agile handling assist control function
- Stop ACC function
- Stop CMBS function
|
| Possible Cause |
- Brake pedal height incorrect position
- Open or Short to ground between the under-hood fuse/relay box and the brake pedal position switch (+B STOP HORN line)
- Open or Short to ground between the brake pedal position switch and the PCM (STOP SW line)
- Short to power between the brake pedal position switch and the PCM (STOP SW line)
- Short to power between the brake light relay and the VSA modulator-control unit (BRAKE DIAG line)
- Fuse failure (Under-hood fuse/relay box No. A4 (10 A)) *1
- Fuse failure (Under-hood fuse/relay box No. A6 (10 A)) *2
- Brake light relay failure
- Brake pedal position switch failure
- PCM internal failure
- VSA modulator-control unit internal failure
|
*1: With AC Power Outlet*2: Without AC Power Outlet