Cadillac ELR Door Electronics Failure Fix Guide

Had a similar issue with my 2011 Cadillac CTS Hybrid. With moderate experience working on car electronics, I initially thought it was just a key fob battery, but the problem turned out to be more complex. The door actuator and electrical connections were the main culprits. After checking the door mechanism thoroughly, the workshop found a damaged cable connector going to the door switch assembly. The wiring had worn through due to repeated door movement, causing intermittent failures in the locking system. The repair involved replacing the damaged wiring and reconnecting the door actuator properly. Total cost was 95€ including diagnostic work. Since the fix, the electric door functions have worked flawlessly. To better assist with your specific case, could you share: Have you noticed any clicking sounds when using the key fob? Does this happen on all doors or just one specific door? Are there any other electrical issues with the vehicle? What specific error codes is your diagnostic tool showing? These details would help determine if your issue matches what I experienced or if its potentially a different component in the door mechanism.

After my last service at 78023 KM, I noticed the problem starting. The diagnostic codes indicated a faulty sensor issue in the door control module. Your response is helpful since I also hear that clicking sound when trying to use the fob, particularly from the driver side door switch. My mechanic initially suspected a simple door handle malfunction, but given your experience with the wiring, I should probably have them check the cable connections in the locking system more thoroughly. Getting an estimate next week and hoping the repair costs stay under 100€. Did you also have issues with the interior overhead lights not activating when opening doors after your wiring was damaged?

Thanks for the additional details. Yes, I actually did experience the same issue with the interior lights, its a common symptom when the wiring fault affects the door switch signals. The clicking sound combined with the overhead light issue strongly suggests a wiring problem similar to what I encountered. The door control module often stores these error codes when the signal path is interrupted, even though the actual fault lies in the wiring harness near the door hinge area. The repair on my CTS was fairly straightforward once the wiring issue was properly identified. The most time-consuming part was accessing the locking system components hidden within the door panel. My mechanic found that the wire insulation had worn completely through in two spots where the cable flexed with door movement. Since youre experiencing problems after recent service work, have the shop check if any door components were disturbed during maintenance. Sometimes the electric door wiring can be inadvertently damaged when working on other systems. Based on my experience, the 100€ budget should cover the repair if its just wiring. However, if the door handle electronics or door switch assembly need replacement, costs could be higher.

I need to investigate the wiring fault angle more seriously. The matching symptoms of both the clicking sound and interior light issues strongly suggest its similar to your situation with damaged cables near the hinges. Its reassuring to know a wiring related fix might stay within my budget. Since mine started after service work, Ill definitely have them check if any door mechanism components were disturbed during maintenance. The worn insulation spots you mentioned make a lot of sense given how the problem developed. Going to have my mechanic focus on the wiring harness and door actuator connections first before replacing any expensive door handle electronics or sensors. The diagnostic codes pointing to the door control module could just be symptoms of the underlying wiring issue rather than a faulty sensor issue itself. Would still appreciate if you could update me on the long-term reliability of your repair when you have time. Really hoping for a similarly straightforward fix with the wiring in my case.