Bad PCM??

[1meangto]

I have a car I'm tuning right now and I can't get the fans to work. If I command them on it gives me a message that says "NO RESPONSE" I'm also getting a P1637 But I can't find any wires broken. If I manually hook a positive to the fans they come on. Does anyone have any ideas? I'm thinking of swapping in another pcm to see if I can command them on. Also if I do need a new pcm can I reflash it or do I need to buy another license for the car?

Thanks in advance,
Mike

[GAMEOVER]

What Year PCM & What OS?

[Tordne]

To flash the ECM you will need to have an available license on your FlashScan; there's no way around that requirement.

[1meangto]

2001-01250003. It was a os 12202088-12204901 cal. Does this sound like it's a bad pcm? He did have his alternator wire fall off and short out and start a fire would this fry a pcm? So if I get a blank pcm and buy another license can I flash a blank pcm or do i need one with the OS that the car came with?

[Tordne]

Most people would probably go to the 2002 OS (12212156). Can't comment on what a fire might do .

[1meangto]

Yes I've used that os a few times it was just easier to use the tune I made for the car before the aps kit. So it didn't need to migrate the whole tune to another os.

[1meangto]

But i can flash a blank pcm?

[Tordne]

You should be fine with an LS1 controller. It is the E40/E38/E67 that need and initial flash.

[1meangto]

Thanks. I've never seen one of these controllers go bad before just not sure what else I may be missing. Or everlooking

[1meangto]

any other thoughts anyone?