2005 Euro ECU Wet

[XD-Mako]

Hi, Hope you can help me.
I have a 2005 Euro Auto & I have a water leak some how and it has wet the ECU. I'm getting all funny lights showing up on the dash, so I located the ECU and found it to be wet.
I will have to find the water leak first and stop it.
But my question is....If I replace the ECU with a second hand one, does it need to be reprogrammed by Honda to suit my car.

Thanks
Mark

[speedo1]

If you can find one with the same code then no

[Jasemas]

Maybe your windshield is leaking or your HAVC

[Kodak]

Try putting in a low (40 deg) oven. May be enough to dry out internals

[Fredoops]

The CL9 ECU motherboard and the has an coating as i found out when taking it apart to reflash the ecu

The motherboard and the chips in it itself wont be damaged by water unless you had a short somewhere.

try again once it's all dried. and double check the actual harness/plug


if you do need to replace the ecu, a honda dealer or someone who has the dealer tool, would need to 'match' the ecu with the immobilizer again so your key's would work.

[XD-Mako]

Thanks, I've taken out the ecu and shook it and water come out. Took the hair dryer to it and left it for 2 days. Plugged it back in and it looks ok. took the car for a 15min drive and no error codes :)
I also pored 2L water over the windscreen and no leaks. It must be from the heater??
I also have place some plastic over the ECU and the plugs so the water can travel down to the carpet until I fix this leak!!

[ECU-MAN]

You may be OK, I would check the ECU pins in two weeks for corrosion.