Changing out the PCM
Thread Starter
Drifting
Joined: Oct 2001
Posts: 1,648
Likes: 1
From: Denham Springs Louisiana
Changing out the PCM
I received my PCM from PCMforLess yesterday. I used the exchange option so I have not taken mine off yet. (Not to mention that the Vette is in the shop getting a new engine) I was wondering if there is any kind of "trick" to removing the old PCM and replacing it with the new one. Or...is it just as easy as it seems to do? Thanks! :thumbs:
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: Changing out the PCM (TorchRedXCVI)
its pretty simple.
the one thing I would mention is that there are metal clip's on the connectors, they need to be pryed up in order to disconnect the wiring harness plugins.
they basically act as a fail safe to keep the plugins from falling out.
oh, and you'll have to swap out your old memcal into the new ECM.
RJ
the one thing I would mention is that there are metal clip's on the connectors, they need to be pryed up in order to disconnect the wiring harness plugins.
they basically act as a fail safe to keep the plugins from falling out.
oh, and you'll have to swap out your old memcal into the new ECM.
RJ
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: Changing out the PCM (TorchRedXCVI)
memcal is inside the ECM, its under the small cover plate (your new one is probably covered with tape). you remove the plate (two screws) then inside you will see a plastic gizmo, this is the memcal, it has the e-prom and limp home chips inside it (if you want just think of it as the chip). each memcal is programed for a specific vehicle so you have to transfer it to the new ECM.
its simple to do, there is a latch at each end, you push the latchs out and down and this will unlock and also push out the memcal for you.
you simply push the memcal into the new ECM (it should only go in one way but make sure you have it lined up correctly) the latches will come up and lock it in when its ingaged.
RJ
its simple to do, there is a latch at each end, you push the latchs out and down and this will unlock and also push out the memcal for you.
you simply push the memcal into the new ECM (it should only go in one way but make sure you have it lined up correctly) the latches will come up and lock it in when its ingaged.
RJ
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Re: Changing out the PCM (TorchRedXCVI)
Or...is it just as easy as it seems to do? Thanks! :thumbs:
Yes, it is as easy as it seems, and the 96 pcms didn't have a removable memcal. Just plug, tighten, and play.
Race Director
Joined: Oct 2002
Posts: 13,717
Likes: 5
From: RI
Re: Changing out the PCM (STL94LT1)
:iagree:
94 and up DO NOT use memcals, all the data is flash into built in fixed, non removable flash memory.
Its just plug and play.......lesson complete.......:D
Chris
94 and up DO NOT use memcals, all the data is flash into built in fixed, non removable flash memory.
Its just plug and play.......lesson complete.......:D
Chris
Drifting
Joined: Jun 2002
Posts: 1,847
Likes: 1
From: Iowa
Cruise-In IV Veteran
Cruise-In V Veteran
Re: Changing out the PCM (kittmaster)
:iagree:
94 and up DO NOT use memcals, all the data is flash into built in fixed, non removable flash memory.
Its just plug and play.......lesson complete.......:D
Chris
94 and up DO NOT use memcals, all the data is flash into built in fixed, non removable flash memory.
Its just plug and play.......lesson complete.......:D
Chris
Hmmm, how does this affect the vehicles odometer reading? I thought that was unique to each unit and was not necessarily "transferrable" to another unit (96 for example), unless done "by a dealer"?
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Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Re: Changing out the PCM (MagikDraggin)
Hmmm, how does this affect the vehicles odometer reading? I thought that was unique to each unit and was not necessarily "transferrable" to another unit (96 for example), unless done "by a dealer"?
Odometer mileage and the VIN # is stored in the CCM.
Race Director
Joined: Oct 2002
Posts: 13,717
Likes: 5
From: RI
Re: Changing out the PCM (STL94LT1)
absolutely..........CCM keeps track of the mileage.........ECM is a dummy module with a serial link to the ECM to tell it what to do......i.e. VATS, ignition lockout, etc
Chris
[Modified by kittmaster, 10:36 PM 5/15/2004]
Chris
[Modified by kittmaster, 10:36 PM 5/15/2004]
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Re: Changing out the PCM (TorchRedXCVI)
While there is not a memcal in the PCM there is a knock module that is located under the trap door of the PCM. Besure to remove yours and install it into your exchange PCM. Just remove the two 1/4" hex head screws, pop the cover off and squeeze the knock module retainer cliip and pull up. Thats about all there is to it.
