Diagnosing and Repairing an MG 5 Charging Fault

Here at Dack Motor Group in Lincoln, we pride ourselves on our expertise in servicing, repairing, and diagnosing hybrid and electric vehicles. Recently, a customer brought their 2021 MG 5 to us with a rather concerning issue: they were unable to charge their vehicle. Here’s how we found and fixed the problem. This shows our commitment to getting drivers back on the road quickly.

The Problem: Unable to Charge

The customer had been experiencing difficulties charging their 2021 MG 5 EV. This issue had rendered the vehicle unusable - an electric car without the ability to charge is essentially stranded. Recognising the need for an EV specialist, the customer brought their vehicle to us for a thorough diagnostic check and repair.

Our Diagnostic Process

When the vehicle arrived at our workshop, we began by checking for any Diagnostic Trouble Codes (DTCs) stored in the car’s system. These codes are invaluable as they provide a starting point for identifying potential faults. The scan revealed fault codes pointing to the vehicle’s charging system. However, fault codes alone are not enough to pinpoint the exact issue. To better understand where the issue laid, we did extensive testing for the MG 5 charging diagnosis, on electrical circuits focussing on the parts used in the charging process. Additionally, we analysed serial data from the vehicle’s onboard systems to monitor communication between components, which helped us isolate the fault effectively.

The Fault: A Faulty Combined Charging Unit (CCU)

After thorough diagnostic testing and analysing the serial data, we identified the root cause of the problem: a faulty Combined Charging Unit (CCU). The CCU is a critical component in electric vehicles, as it manages the charging process by converting the AC power from a charging station into the DC power needed to charge the battery. It also contains the DC/DC converter, which is responsible for converting high-voltage DC power from the battery into lower voltage power for the vehicle’s auxiliary systems. When the CCU fails, both the charging and power distribution systems can be compromised.

The Solution: Replacement and Coding for this MG 5 EV Repair

With the faulty CCU identified, we proceeded to replace the unit. This process involved sourcing a new CCU, installing it, and then coding it to ensure it was properly integrated with the vehicle’s system. Coding is a crucial step, as it allows the new component to communicate correctly with the car’s onboard systems. Once the replacement was complete, we thoroughly tested the charging system to confirm the repair. The MG 5 successfully charged without any issues, and the fault codes were cleared from the system.

Why Choose Dack Motor Group for an EV repair?

This repair highlights the importance of choosing a specialist garage for your hybrid and electric vehicle needs. Here at Dack, we combine advanced diagnostic tools, expert knowledge, and years of experience to provide reliable solutions for even the most complex issues. Our ability to diagnose and repair faults quickly and accurately saves our customers time, money, and stress - proven in this case with the MG 5 charger repair.

Conclusion: Trust the Experts

If you’re experiencing charging issues or any other faults with your hybrid or electric vehicle, don’t hesitate to get in touch with us. We’re here to help keep your vehicle running smoothly, so you can enjoy all the benefits of driving a modern, eco-friendly car.

Contact us today to book an appointment, or learn more about our services. Let us take care of your vehicle, just as we did for the owner of this 2021 MG 5 EV.