Lost Communication With Power Source Control
Table of contents
B278C TOYOTA Possible Causes
- Faulty Power Management Control ECU
- Power Management Control ECU harness is open or shorted
- Power Management Control ECU circuit poor electrical connection
- Faulty Certification ECU (Smart Key ECU Assembly)
How do I fix code B278C 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 B278C TOYOTA code
The cost of diagnosing the B278C 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
- Engine Light ON (or Service Engine Soon Warning Light)
B278C TOYOTA Description
This Diagnostic Trouble Code (DTC) is stored when Local Interconnect Network (LIN) communication between the Certification ECU (Smart Key ECU Assembly) and Power Management Control ECU stops for 10 seconds or more.