Good afternoon. For starters, you can conduct a visual examination of the ECU for visible damage, such as corrosion or damaged wires. But a more effective way to solve the problem will be the use of jcb diagnostic software
https://sites.google.com/view/jcb-servicemaster/home . This program will help consider codes of malfunctions that were saved in the ECU. Which in turn will make it possible to quickly and accurately determine which parts or systems can require repair or replacement.
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