Bad TCM

[GuntherRommel]

We have a M1123 that was stuck in limp mode, changed the relay and the sensors and the light. Could not get codes. Finally swapped out the TCM from another 1123 and now is working prefect. My question is: does anyone work on these or do we need to buy a new one? Looks to have white mold/fungus growing inside the box. Milage is only 6100

 

[springer1981]

Hard to tell from the pictures but that looks like aluminum oxide, AKA white death, which is aluminum rust Indicating moisture may have gotten into the Box. Might be repairable but it depends on how much moisture and oxidation got to the Circuit board in the TCU.

 

[springer1981]

Now that I can see in on a monitor and not my phone that is oxidation. If you want to send it to me I'll give it my best shot to clean it up and look for any obvious issues. I won't be able to test it but I can't make it work less than it is now LOL. PM me if you want.