DTC: C0040-62

DTC C0040-62  : Brake Light Switch Failure (Stuck ON)

NOTE: Before You Troubleshoot, Review The General Troubleshooting Information .

DTCs (VSA)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   - 4. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC C0040-62 indicated?

   YES 

   If only DTC C0040-62 is indicated, go to step 2.

   NO 

   If any other DTCs are indicated, go to the indicated DTCs troubleshooting.

   NO 

   Intermittent failure, the system is OK at this time. Refer To Intermittent Failures Troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

2. Brake pedal position switch check

   -1. Check the brake pedal position switch.

   Is brake pedal position switch OK?

   YES 

   Go to step 3.

   NO 

   Replace The Brake Pedal Position Switch .

3. PGM-FI DTCs check

   -1. Check for PGM-FI DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame

   Are any DTCs indicated?

   YES 

   Go to indicated DTCs troubleshooting. After all PGM-FI DTC's have been repaired, return to VSA and clear this code.

   NO 

   Go to step 4.

4. PCM check (substitution)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Substitute a known-good PCM.

   - 3. Turn the vehicle to the ON mode.

   - 4. Clear the DTC with the HDS.

   - 5. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   - 6. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 7. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C0040-62 Brake Light Switch Failure (Stuck ON)

   Is DTC C0040-62 indicated?

   YES 

   Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If they are OK, Replace The VSA Modulator-Control Unit .

   NO 

   If the PCM was substituted, replace the original PCM - Refer to:

   PCM Removal and Installation, or

   PCM Removal and Installation (9-Speed A/T) (2019 2020 2021) .