Dead Roadrunner, not sure how but water damage.

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December 27th, 2011
1998ws6

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Dead Roadrunner, not sure how but water damage.

I had worked on a 2002 Z06 a few years ago, and left my roadrunner installed in his car for about 1 year and finally got it back from him about a year ago but it was missing the USB cable. A few months ago, I ordered a new one, and I went to use it on another 2003 Z06 today and it did not work. I could connect with the USB cable and was able to communicate, but no connection to the OBD2 port.

I decided to take it apart to see if the board has come loose, but that was not the case. Somehow, water had damaged the ECM, and there was corrosion all over the triacs and all over the case. Fortunately it looks like the roadrunner may still be ok, but the stock ECM is likely toast.

Attachment 12454 Attachment 12455 Attachment 12456 Attachment 12457

A few things I noticed, the board is a 1999-2000 ECM, not a 2001-2002 as I thought it would have been.

Anybody know the part number of the 44 pin header? I hate to pay $8.00 to ship a $10 part and will be placing an order with mouser or digikey in the next couple of days?

I do not know if the through case connector can be salvaged, or if it is toast as well, there is lots of corrosion growing on it.

Thanks,

Ryan
December 27th, 2011
GMPX

Ryan, you might have to ask Moates for the part number (or manufacturer) of the 44 pin header.
What a shame, the PCM sure has had some water through it.
December 27th, 2011
ScarabEpic22

FYI, if its a 512kb PCM then it wont work on an 03-07 LS1B PCM anyway as they have 1MB flash.

Also, 99-02 512kb PCMs are usually interchangeable. A common upgrade for 99-01 vehicles is to use an 02 OS as it is more refined than earlier OSs.
December 27th, 2011
mr.prick

Water will kill the RR's battery.

You may need to replace it. Sneaky:
January 5th, 2012
1998ws6

Removed the 44 pin header without damage and re installed it into a new PCM, It works on the bench, so now I need to find a car to test it with.

I am glad I do not do this kind of SMD rework on a daily basis :)

Ryan
January 6th, 2012
N0DIH

I do it daily, and under a microscope 95% of the time. Take your time, don't have too much heat, keep your iron if you use one around 700F, do NOT crank it up to as hot as it will go. I have swapped the same flash chip on the PCM when I was having some issues 10+ times and when I am done you can't tell it was ever off the board. Heat and time kill a board, you will lift the pads and your PCM is most likely toast. So spend as absolutely little amount of time on there as possible with the iron. And if you have to let it cool and go back to touch it up, that is better. Take your time. These FR4 boards are tough, but can't be abused at all.

Quote:

Originally Posted by 1998ws6

Removed the 44 pin header without damage and re installed it into a new PCM, It works on the bench, so now I need to find a car to test it with.

I am glad I do not do this kind of SMD rework on a daily basis :)

Ryan

The RR's are all the same, 512k or 1MB, there is no difference. I have used mine in several different configs, 512k with a 512k code, 1MB with 512k code (3800's are like this) and 1MB with 1MB code. It doesn't matter. The "difference" is simply what PCM it was installed in.

It will even work in a 96 V6 PCM with 256k code in it. If I get off my duff, I'll put in my GMT400 454 Burb in the BlackBox PCM, it just needs a custom housing then.