cokedrvrbjw Posted March 10, 2005 Report Share Posted March 10, 2005 How many members on here have had to go through the relearn procedure when installing the new pcm? Just curious how much time i need to get it done. Link to comment Share on other sites More sharing options...
SSThunder Posted March 10, 2005 Report Share Posted March 10, 2005 How many members on here have had to go through the relearn procedure when installing the new pcm? Just curious how much time i need to get it done. <{POST_SNAPBACK}> No relearn for me. I've got EFILive tuning tool so Bryan said I don't have to do the relearn process. Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted March 10, 2005 Report Share Posted March 10, 2005 Are you talking about the security relearn or the cps relearn? I had to do the security relearn several times after swapping the motor and the truck sat for so long with a dead battery. It's still my stock PCM lol Link to comment Share on other sites More sharing options...
cadowns Posted March 10, 2005 Report Share Posted March 10, 2005 Are you talking about the security relearn or the cps relearn? I had to do the cps relearn after 1500 miles on a PCM swap. I would say don't be surprised. CD Link to comment Share on other sites More sharing options...
marc_w Posted March 10, 2005 Report Share Posted March 10, 2005 What's a CPS relearn? Link to comment Share on other sites More sharing options...
AWDGM Posted March 10, 2005 Report Share Posted March 10, 2005 Crankshaft posistion sensor Marc. My new Auto Enginuity software does that now! The security relearn must be done every time a different PCM is installed, unless the tuner shuts off the security relearn feature. Shutting it off make the truck much easier to steal, other than that will have no other effect. Butch 02 Sierra Denali Link to comment Share on other sites More sharing options...
BenKey Posted March 10, 2005 Report Share Posted March 10, 2005 Are you talking about the security relearn or the cps relearn? I had to do the security relearn several times after swapping the motor and the truck sat for so long with a dead battery. It's still my stock PCM lol <{POST_SNAPBACK}> I never had to do that on mine. Link to comment Share on other sites More sharing options...
Silver HO Posted March 10, 2005 Report Share Posted March 10, 2005 Crankshaft posistion sensor Marc. My new Auto Enginuity software does that now! The security relearn must be done every time a different PCM is installed, unless the tuner shuts off the security relearn feature. Shutting it off make the truck much easier to steal, other than that will have no other effect. Butch 02 Sierra Denali <{POST_SNAPBACK}> Not necessarily. Used PCM's that have already been run in a similar vehicle "usually" don't need the relearn procedure. Brand new PCM's that haven't been ran in a vehicle yet tend to require the relearn procedure. Link to comment Share on other sites More sharing options...
AWDGM Posted March 10, 2005 Report Share Posted March 10, 2005 This is a safety feature programmed in by GM. "The password learn procedure must be performed if passlock sensor, body control module (BCM), powertrain control module (PCM) or vehicle control module (VCM) has been replaced." A battery that goes dead could trigger the security feature, it was designed to make it difficult to steal the vehicle. Like I said, some of the tuners will disable this feature, making it easier to swap PCM's around. Link to comment Share on other sites More sharing options...
Xero Posted March 10, 2005 Report Share Posted March 10, 2005 mine went i just fine, no relearn but i got a multiple cylinder misfiring from bryans tune....... Link to comment Share on other sites More sharing options...
marc_w Posted March 10, 2005 Report Share Posted March 10, 2005 Cool, thanks Butch. (BTW: April 1st?? ;) I got some mods to try out.) Link to comment Share on other sites More sharing options...
AWDGM Posted March 10, 2005 Report Share Posted March 10, 2005 It beginning to look like opening day at New England Dragway will be snowplow racers only!!! Weather permitting I'll see you there Marc, I have a new tune I'm dying to make some runs on. Can't wait to see Bills first runs in his CTS-V too! Butch 02 Sierra Denali Link to comment Share on other sites More sharing options...
desrtrat Posted March 10, 2005 Report Share Posted March 10, 2005 How many members on here have had to go through the relearn procedure when installing the new pcm? Just curious how much time i need to get it done. <{POST_SNAPBACK}> i had to do mine when i got the tune from bryan. it took about 35 min. to do he sends instructions on how to do it .. very simple. Link to comment Share on other sites More sharing options...
cokedrvrbjw Posted March 11, 2005 Author Report Share Posted March 11, 2005 so it needs to be done every time I swap out the pcm, even with the old one for service dates? Link to comment Share on other sites More sharing options...
96vteccd5 Posted May 19, 2009 Report Share Posted May 19, 2009 my wheatley tune didn't need a crank relearn just security. Link to comment Share on other sites More sharing options...
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