Engine-Codes - Toyota - C0278 Toyota

C0278 Toyota Code - Open or Short Circuit in ABS Solenoid Relay Circuit

- Code Popularity: 99,551 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C0278 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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)
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How to Fix the DTC 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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the C0278 Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the C0278 Toyota Code Mean?

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.

C0278 Toyota Code - Open or Short Circuit in ABS Solenoid Relay Circuit

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