DTC C0040-12 (2017 2018 2019)

DTC C0040-12  : Brake Light Switch Failure (Stuck ON)/Brake Pedal Stroke Sensor Stuck (EBB)

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC (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 under these conditions:

   • Vehicle speed at 9 mph (15 km/h) or more for at least 60 seconds
   • Accelerator pedal pressed
   • Brake pedal released

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

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   C0040-12 Brake Light Switch Failure (Stuck ON)/Brake Pedal Stroke Sensor Stuck (EBB)

   Is DTC C0040-12 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   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. Electric brake booster system DTC check

   -1. Check for electric brake booster system DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1C01-96 Brake Pedal Stroke Sensor Component Internal Failure
   C1C02-12 Brake Pedal Stroke Sensor Signal Circuit 1 Short To Battery
   C1C02-14 Brake Pedal Stroke Sensor Signal Circuit 1 Short To Ground or Open
   C1C03-11 Brake Pedal Stroke Sensor Signal Circuit 2 Short To Ground
   C1C03-15 Brake Pedal Stroke Sensor Signal Circuit 2 Short To Battery or Open
   C1C04-11 Brake Pedal Stroke Sensor Power Circuit Short To Ground or Battery

   Is DTC indicated?

   YES 

   Go to indicated DTCs troubleshooting.

   NO 

   Go to step 3.

3. Brake pedal/brake pedal position switch and electric brake booster check

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

   -2. Inspect the brake pedal and brake pedal position switch .

   -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 under these conditions:

   • Vehicle speed at 9 mph (15 km/h) or more for at least 60 seconds
   • Accelerator pedal pressed
   • Brake pedal released

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

   -7. Check for DTCs with the HDS.

   DTC Description	DTC
   C0040-12 Brake Light Switch Failure (Stuck ON)/Brake Pedal Stroke Sensor Stuck (EBB)

   Is DTC C0040-12 indicated?

   YES 

   Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster .

   NO 

   Troubleshooting is complete.