I got my new PCM today from Ed Wright and I need to install it when I get home. The install itself should be fairly easy, however I was told I need to do a VATS relearn. It was a core exchange deal and I did not send him my orignal computer.

I did a search for VATS relearn and the only thing that came up was a bunch of stuff for the C4, but no relearn procedures. Is there a procedure for the C5?

Also, is there anything special I need to watch out for? Or is it a fairly easy install... TIA.

 

Yes, when you replace either the PCM or BCM you need to do the Theft Deterent re-learn procedure. This should help: http://service.gm.com/servlets/BlobS...tmlFile=723216


[Modified by RadarBlue, 8:30 PM 5/6/2002]

 

Thanks for the help... Unfortunantly that site requires a password.

 

The basic procedure is this:

1. install new PCM.

2. try to start, should fire and die. leave key on. Security light will be on or flashing. Leave it alone until the security light goes off (about 15min I think).

3. When security light goes off, try to start again (just let turn over and fire, don't keep on it), leave key on. Security light will come on. wait another 15 or so for it to go off.

repeat. should take about 3 times, should start and run on the 4th I believe.

When you do it, turn everything else off, roll windows down and leave doors shut (so you can reach in and start it). If you disturb the process, you'll have to start over.

If I'm forgetting something, maybe someone can fill in?

This should work though.

 

Sorry about the password business. I tried to make sure the link worked. Oh well, here it is:

Programming Theft Deterrent System Components

Important
The body control module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. Refer to BCM Programming/RPO Configuration .
If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn the passkey data code immediately. The existing PCM however, must learn the new fuel continue password when the BCM is replaced.
If replacing a PCM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.

Conditions
Use these procedures after replacing:

BCM
PCM

10 Minute Learn Procedure

Tools Required
Tech 2
Techline terminal with current SPS (Service Programming System) software
Connect the Tech 2 to the vehicle.
Select "Request Information" under "Service Programming".
Disconnect the Tech 2 from the vehicle and connect it to a Techline terminal.
On the Techline terminal, select "Theft Module Re-Learn" under "Service Programming".
Disconnect the Tech 2 from the Techline terminal and connect it to the vehicle.
Turn ON the ignition, with the engine OFF.
Select "VTD Re-Learn" under "Service Programming".
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF (the vehicle is now ready to relearn the password on the next ignition switch transition from OFF to CRANK).
Turn OFF the ignition, and wait 5 seconds.
Start the engine (the vehicle has now learned the password).
With the Tech 2 (scan tool), clear any DTCs.


30 Minute Learn Procedure

Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the password on the next ignition switch transition from OFF to CRANK).

Important
The vehicle learns the password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.


Start the engine (the vehicle has now learned the password).
With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).
© Copyright General Motors Corporation. All Rights Reserved.




[Modified by RadarBlue, 5:08 PM 5/7/2002]

 

Thanks! :cheers:

 

I was pretty close. :cool:

Best from the mouth of GM though.

 

After reading these posts, the average owner would be bonkers to attempt to do this job himself. It's obviously only for the experienced electronics whiz.

 

:rolleyes: Here's what I did-- take out your own computer, send it to Ed Wright, then re-install it. My restart was flawless--with none of this silly BS to deal with...Overnighted to and from E.W., WELL worth it IMO to use your original com :yesnod: :cheers:

 

It's really a piece of cake, just time consuming if you don't have a Tech 2. The 30 min method is for when you don't have a tech 2. You can't break anything. The worst that can happen is your car won't start and you have to start the procedure over.

It's not rocket science.

 

Here is the problem with that... If I need to use my car I am screwed. Not only that I am glad I did the core exchange deal. Their was a problem with the PCM he sent me and if I didn't have my old one my car would be stranded at the shop for a week.