pcm

kevineugene · Post by **kevineugene** » Mon Nov 24, 2008 3:51 pm

how do i find out if my pcm is bad

kmac1 · Post by **kmac1** » Wed Nov 26, 2008 3:40 pm

There is no true PCM only test procedure for an end user or mechanic. There is usually a diagnostic procedure for any or all symptoms/codes that may be present in the vehicle. If diagnostics is followed to a T and the symptoms still exist then that is usually when changing the PCM is recommended...

Kevin@Diablo

kevineugene · Post by **kevineugene** » Thu Nov 27, 2008 1:00 pm

well my car died and when i hook my tuner up to see if there is a trouble code it says can not recognize vehicle

carmos · Post by **carmos** » Fri Nov 28, 2008 2:42 am

kevineugene wrote:well my car died and when i hook my tuner up to see if there is a trouble code it says can not recognize vehicle

i had the same problem.call diablo and a tech can walk you through a force install of your original tune.good luck.

kevineugene · Post by **kevineugene** » Fri Nov 28, 2008 11:21 am

but my car want even crank , it died on me going down the rd, and thats when i plugged my tuner in and it wouldnt recognize my vehicle, that why i think my pcm is bad , i was going to see if my tuner would tell me why my car died .

kevineugene · Post by **kevineugene** » Fri Nov 28, 2008 11:24 am

is there any thing i need to do when i try another used pcm ?

johan · Post by **johan** » Fri Nov 28, 2008 12:42 pm

Died on you going down the road, sounds like i wiring issue to me, did you check that out??
A pcm is highly unlikely to just die on you while operating the vehicle.

kevineugene · Post by **kevineugene** » Fri Nov 28, 2008 4:13 pm

well why want my tuner rocognize my car now that this has happened

johan · Post by **johan** » Fri Nov 28, 2008 4:30 pm

Not sure why but if it is an electrical short then the whole system might be down depending on where the short is.

kmac1 · Post by **kmac1** » Mon Dec 01, 2008 12:28 pm

kevineugene wrote:well why want my tuner rocognize my car now that this has happened

If there is any type of electrical issue that doesn't allow the PCM to have sufficient power or ground the Predator will not be able to communicate to it properly or even recognize it at all.

"Throwing" a PCM at it is just a guess if you don't do any diagnostics like checking all the basics, fuses, grounds etc...

Kevin@Diablo

kevineugene · Post by **kevineugene** » Thu Dec 04, 2008 12:41 pm

i have chkd all fuses what else could it be

kevineugene · Post by **kevineugene** » Thu Dec 04, 2008 12:42 pm

and my security light is flashin real fast

Post by **mikel** » Thu Dec 04, 2008 12:51 pm

Sounds like the PCM simply failed.
It is rare, but can happen.

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