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Author Topic: Water damage ecu  (Read 870 times)
Nic88
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« on: March 24, 2021, 11:20:42 AM »

Hi guys, my ecu got some water on it. As a result the car won't start... I tried connected to the ecu with vcds but not luck. I left it for a few days and sprayed contact cleaner etc. I don't have any corrosion or visible damage. But It still wont work when connected to the car, but on my bench setup I can connect to the ecu with no issues. Is there a relatively easy process to fix the ecu, does someone perhaps know why it work work off the car but not on. It's an me7.5
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BlackT
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« Reply #1 on: March 24, 2021, 01:06:37 PM »

Firat check connectors white, red, brown... that connect engine harnes to car. Under the ECU in longitudal engines
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Nic88
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« Reply #2 on: March 24, 2021, 02:46:42 PM »

So as ecu works on a bench... I also put a faulty ecu in the car and thay works. So it can't be the harness on the car. I'm not sure if there is any fuse/capacitor on the ecu thats involved when connected to the car
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prj
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« Reply #3 on: March 24, 2021, 03:20:04 PM »

Step 1.
Buy another ECU

Step 2.
Clone the current one to the new one.

Forget about using any ECU after water damage.
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