Brake, TC and ABS light on
01-12-2015, 07:37 AM
#1
Brake, TC and ABS light on I'm not good with diagnostic. I have brake, TC and ABS light on the dash right now. The brake light works but only if you move the pedal passed 10%.
I did replace the brake pedal sensor (pain in the back) but nothing changed.
Codes:
CO281: Brake Switch Circuit
CO550: Electronic Control Unit Performance
C0163: Brake Pedal position Sensor Code. Possible causes are :
Signal Circuit is Open; Brake Pedal Pos. Sensor is Faulty; BPP Sensor needs Calibration; All brake lamps open; Internal EBCM problem.
C0278: Longitudinal circuit signal plausibility failure. Possible causes are: Yaw sensor faulty or in need of calibration; EBCM faulty, not sending proper signal to Yaw sensor.
I dont know where to start with 4 codes.
I did replace the brake pedal sensor (pain in the back) but nothing changed.
Codes:
CO281: Brake Switch Circuit
CO550: Electronic Control Unit Performance
C0163: Brake Pedal position Sensor Code. Possible causes are :
Signal Circuit is Open; Brake Pedal Pos. Sensor is Faulty; BPP Sensor needs Calibration; All brake lamps open; Internal EBCM problem.
C0278: Longitudinal circuit signal plausibility failure. Possible causes are: Yaw sensor faulty or in need of calibration; EBCM faulty, not sending proper signal to Yaw sensor.
I dont know where to start with 4 codes.
01-12-2015, 02:30 PM
#4
TECH Fanatic
Delete all of the codes and start with the ones that set first. If they all set at the same time, begin diagnosis of the lowest numbered DTC. The systems are designed so that in the event of multiple DTC's, the first DTC in the series could potentially cause the rest of them. Start there.
Sounds like possible water intrusion to the EBCM or the connector. I'd actually start there if you have brake lights.
Sounds like possible water intrusion to the EBCM or the connector. I'd actually start there if you have brake lights.
01-12-2015, 02:34 PM
#5
TECH Fanatic
01-13-2015, 02:36 AM
#6
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It isn't an on/off switch. It is more like a rheostat, hence the name pedal position sensor. It is not called a brake switch. There is a clue in this code information.
C0163: Brake Pedal position Sensor Code. Possible causes are :
Signal Circuit is Open; Brake Pedal Pos. Sensor is Faulty; BPP Sensor needs Calibration; All brake lamps open; Internal EBCM problem.
Believe me, if you have replaced or removed your brake pedal position sensor you will have to have it recalibrated. I had mine done at the dealership but if you have access to a tech2 then you're set.
Also, I'd be willing to bet that your cruise control doesn't work right now either.
Sorry I can't help with C0550 and C0278.
C0163: Brake Pedal position Sensor Code. Possible causes are :
Signal Circuit is Open; Brake Pedal Pos. Sensor is Faulty; BPP Sensor needs Calibration; All brake lamps open; Internal EBCM problem.
Believe me, if you have replaced or removed your brake pedal position sensor you will have to have it recalibrated. I had mine done at the dealership but if you have access to a tech2 then you're set.
Also, I'd be willing to bet that your cruise control doesn't work right now either.
Sorry I can't help with C0550 and C0278.
Last edited by Brackets; 01-13-2015 at 03:22 AM.
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01-13-2015, 07:38 AM
#8
Delete all of the codes and start with the ones that set first. If they all set at the same time, begin diagnosis of the lowest numbered DTC. The systems are designed so that in the event of multiple DTC's, the first DTC in the series could potentially cause the rest of them. Start there.
Sounds like possible water intrusion to the EBCM or the connector. I'd actually start there if you have brake lights.
Sounds like possible water intrusion to the EBCM or the connector. I'd actually start there if you have brake lights.
Where is the EBCM?
01-13-2015, 10:08 AM
#9
TECH Fanatic