How much can be improved by replacing the BMW gearbox/Brushing the ECU of the BMW x6?

The BMW engine cannot start
The car has a mileage of about 10,000, the model is BMW, and the engine is configured. The owner reported that the vehicle would not start.
After picking up the car, our Xinchehui maintenance staff connected the diagnostic instrument for self-diagnosis. The fault diagnosis was that the taxi starter could run, but there was no sign of fire. After being detected by the diagnostic instrument, the following fault codes are found: ① The main relay is short-circuited to the positive pole ② The cylinder injection device is closed and short-circuited to the positive pole ③ The valve adjustment device is short-circuited to the positive pole.
According to the vehicle inspection fault code, we first analyzed that the engine power supply module is most likely to be damaged by water. The power supply module of this car is installed under the front air-conditioning filter. It is easy for water to enter during rain and car washing. Jinan a few days ago There has just been a heavy snowfall. The melting snow in the past few days has easily caused water to enter the module. I removed the power supply module and found no obvious water marks. When I opened the power supply module, the fuse was not blown and there was no trace of water inside. The conclusion was overturned.
Reinstall and organize your thoughts. When checking, the diagnostic instrument prompts that there is no communication. Check the disassembly and assembly parts again to confirm that the assembly and restoration are correct. According to the circuit diagram, I checked the wiring and found no abnormalities. When I unplugged the plug, I found water stains inside the plug. So I removed the air intake duct, took it off, and found that the plug was filled with water. The fault was found and the cause of the water intrusion was analyzed. The engine control module was installed under the air intake duct with the plug facing upwards. Look up to find the source of water dripping from the junction. Treat this place with snake glue. There will be no leakage when watering. In order to prevent water leakage in other places, we treated the bottom of the wiper with snake glue, and there was no leakage when watering. After discussion with the customer, we recommend that the engine control module be replaced along with the. After obtaining the customer's consent, we began to place an order to replace the engine control module with a new engine power supply module. After assembly, the diagnostic program matched successfully and the fault was resolved.
Shanghai Xinchehui Industrial Co., Ltd. adheres to the integrity-based business policy and provides high-quality services to car owners. Xinchehui provides professional repairs for high-end cars such as Mercedes-Benz, BMW, and Porsche
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