B278C Scion Code - Lost Communication With Power Source Control
Quick Answer
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. Common causes include Faulty Power Management Control ECU, Power Management Control ECU harness is open or shorted, Power Management Control ECU circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B278C Scion indicates Lost Communication With Power Source Control.
- Common causes
- Common causes include Faulty Power Management Control ECU, Power Management Control ECU harness is open or shorted, Power Management Control ECU circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B278C Scion Description
What are the Possible Causes of the DTC B278C Scion?
- 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 to Fix the DTC B278C Scion?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B278C Scion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B278C Scion Code
1. What are the common symptoms of OBDII code B278C in a Scion related to lost communication with power source control?
- Common symptoms may include issues with power windows, power door locks, interior lights, or other electrical components not functioning properly.
2. What are the possible causes of OBDII code B278C in a Scion indicating lost communication with power source control?
- Potential causes may include a faulty power source control module, wiring or connection issues, blown fuses, or a malfunctioning body control module.
3. How can I diagnose the root cause of OBDII code B278C in my Scion for lost communication with power source control?
- A comprehensive diagnosis may involve checking the power source control module for power and ground, inspecting wiring harnesses for damage, and using a scan tool to communicate with the affected module.
4. Are there any quick repair tips for resolving OBDII code B278C in a Scion due to lost communication with power source control?
- Quick repair tips could include checking and replacing blown fuses, ensuring all connections are secure, and resetting the power source control module by disconnecting the battery for a few minutes.
5. Can OBDII code B278C in a Scion be fixed without professional help if related to lost communication with power source control?
- While some basic troubleshooting steps can be done DIY, diagnosing and repairing the underlying issue may require advanced tools and expertise, so seeking professional help is advisable.
6. Is it safe to continue driving my Scion with OBDII code B278C triggered by lost communication with power source control?
- It is not recommended to drive the vehicle with this code active, as it can lead to further electrical problems and potential safety concerns related to power-operated components.
7. Will resetting the OBDII code B278C in my Scion resolve the issue of lost communication with power source control?
- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the lost communication with the power source control module.
8. How much does it typically cost to repair OBDII code B278C in a Scion caused by lost communication with power source control?
- The cost of repair can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
9. Can extreme weather conditions or water damage contribute to triggering OBDII code B278C related to lost communication with power source control in a Scion?
- Yes, extreme weather conditions or water damage can potentially cause electrical issues leading to lost communication with the power source control module and the triggering of this OBDII code.
10. Are there any preventive maintenance measures I can take to avoid encountering OBDII code B278C in my Scion due to lost communication with power source control?
- Regularly checking and maintaining the electrical system, keeping connections clean and secure, and addressing any warning signs promptly can help prevent issues leading to this OBDII code.
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