After a minor under-chassis accident with my Mercedes W253 GLC43 coupe and subsequent body repairs, I’m encountering a persistent radar malfunction. Despite completing the physical repairs, the fault code “U150387: Communication with the radar sensor 3 has a malfunction. The message is missing” remains unresolved. We’ve performed several diagnostic steps but are now stuck on how to correctly perform Mb Xentry Radar Coding to fix this issue.
Initially, we suspected a faulty radar sensor 3 (right radar sensor). To verify this, we swapped it with sensor 2 (left radar sensor), as they use the same part number. Interestingly, both sensors functioned correctly when connected to the “sensor 2 connector,” indicating the sensors themselves are not defective. However, the malfunction persisted specifically for sensor 3 as diagnosed by Xentry.
Next, we investigated a potential wiring problem with the right radar sensor. A thorough inspection confirmed that all wiring is intact and in good condition. Further testing revealed that when both left and right sensors are connected to the right radar sensor connector, they operate, but both are identified by the system as “sensor 2.” This was unexpected, as we anticipated one of them would be recognized as sensor 3.
To summarize the situation:
- The wiring for both left and right radar sensors is confirmed to be in good working order.
- Both radar sensors are verified to be functioning correctly.
- Both sensors are the original parts fitted to the vehicle.
- Both sensors consistently identify themselves as “sensor 2” when connected to either connector.
- The persistent fault code is: “U150387: Communication with the radar sensor 3 has a malfunction. The message is missing.”
- We have already replaced the radar sensor control unit N62/1 with a new one, but the problem persists.
My primary question revolves around mb xentry radar coding. Is it necessary to perform specific coding or calibration procedures to ensure the radar sensor is correctly identified as sensor 3? I attempted to code the radar sensor control unit N62/1 using Xentry, but this did not resolve the issue. Could there be a specific procedure within Xentry for assigning sensor identification, or is there a calibration step required after replacing the control unit or after an accident that affects the radar system? Any guidance on the correct mb xentry radar coding process for this scenario would be greatly appreciated. We need to understand if there’s a step we are missing in Xentry to properly configure the radar system after the repairs.
