DTC C0040-12
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 Description | DTC |
|---|---|
| C0040-12 Brake Light Switch Failure (Stuck ON)/Brake Pedal Stroke Sensor Stuck (EBB) |
DTC (VSA)
- 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 to the READY TO DRIVE mode.
-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 .
- Brake pedal height check
-1. Check the brake pedal height .
Is the brake pedal height OK?
YES
Go to step 3.
NO
- Brake pedal position switch performance check 1
-1. Check the parameter(s) below with the HDS.
Signal Current conditions Values Unit BRAKE SWITCH Does the signal change ON and OFF when the brake pedal is pressed and released?
YES
Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
NO
Go to step 4.
- Brake pedal position switch performance check 2
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Brake pedal position switch 4P connector -3. Check the parameter(s) below with the HDS.
Signal Current conditions Values Unit BRAKE SWITCH Does the indicator change from ON to OFF?
YES
Replace the brake pedal position switch .
NO
Go to step 5.
- Shorted wire check (STOP_SW line to power)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS, and wait more than 1 minute.
-3. Disconnect the following connector.
PCM connector A (50P) -4. Turn the vehicle to the ON mode.
-5. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Brake pedal position switch 4P connector: disconnected PCM connector A (50P): disconnected Test point 1 PCM connector A (50P) No. 26 Test point 2 Body ground Is there 0.1 V or more?
YES
Repair a short to power in the wire between the brake pedal position switch and the PCM.
NO
The STOP_SW wire is OK. Go to step 6.
- PCM check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Substitute a known-good PCM .
-3. Reconnect the following connectors.
Brake pedal position switch 4P connector PCM connector A (50P) -4. Turn the vehicle to the ON mode.
-5. Clear the DTC with the HDS.
-6. Turn the vehicle to the OFF (LOCK) mode, then to the READY TO DRIVE mode.
-7. 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.
-8. 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 VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
NO