Open or Short Circuit in ABS Solenoid Relay Circuit
Table of contents
C0278 TOYOTA Possible Causes
- Blown Anti-Lock Brake System (ABS) Solenoid Relay Fuse
- Faulty ABS Solenoid Relay
- ABS Solenoid Relay harness is open or shorted
- ABS Solenoid Relay circuit poor electrical connection
- ABS Actuator (Skid Control ECU)
How do I fix code C0278 TOYOTA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the C0278 TOYOTA code
The cost of diagnosing the C0278 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0278 TOYOTA Description
The solenoid relay supplies power to the Anti-Lock Brake System (ABS) solenoid and TRAC solenoid.
After the ignition switch is turned on, the vehicle speed has reached 4 mph (6 km/h) and the solenoid is determined to be normal by the initial check self- diagnosis, the relay switches on. If any open or short circuits are detected, the relay switches off.
These DTCs may be set if the voltage supply to the solenoid relay (+BS) falls below the DTC detection threshold due to the battery or generator outputs being insufficient.