reptile tune
Joined: Apr 2010
Posts: 12,601
From: Mentor, Ohio
Here is a security re-learn method that has worked for me before (make sure you have a fully charged battery and you must follow it to the LETTER). It can take about 30-60 minutes to do.
Notes: Security relearn procedure will not work with the valet key! Also, do NOT remove the key until the relearn is complete. When the steps state to switch the ignition to the off position, just switch to off, do not remove the key from the ignition.
1. Disconnect battery
2. Install new computer
3. Reconnect battery
4. Put emergency brake on to disable daytime running lights (this step is required!)
5. Make sure all doors trunk and hood are closed leave driver window down and reach in through the window
6. Try to start. If it doesn't start, leave the key in the on position for 11 min on 97-03 cars and 15 min for 04 and newer cars. The security light should turn off after this amount of time.
7. Before proceeding, verify the security light is no longer on OR that the message center is no longer flashing the security message with the other messages it's cycling (such as battery).
8. Turn off ignition for 30 seconds
9. Try and start the car. It probably won't start. Repeat step 5 two more times.
10. If this doesn't work disconnect battery for 5 seconds and then try and start the car.
Notes: Security relearn procedure will not work with the valet key! Also, do NOT remove the key until the relearn is complete. When the steps state to switch the ignition to the off position, just switch to off, do not remove the key from the ignition.
1. Disconnect battery
2. Install new computer
3. Reconnect battery
4. Put emergency brake on to disable daytime running lights (this step is required!)
5. Make sure all doors trunk and hood are closed leave driver window down and reach in through the window
6. Try to start. If it doesn't start, leave the key in the on position for 11 min on 97-03 cars and 15 min for 04 and newer cars. The security light should turn off after this amount of time.
7. Before proceeding, verify the security light is no longer on OR that the message center is no longer flashing the security message with the other messages it's cycling (such as battery).
8. Turn off ignition for 30 seconds
9. Try and start the car. It probably won't start. Repeat step 5 two more times.
10. If this doesn't work disconnect battery for 5 seconds and then try and start the car.
Joined: Apr 2010
Posts: 12,601
From: Mentor, Ohio
Also, since that is a donor PCM, do the service numbers match between the old and new? There are some "interchange" numbers for them. If you don't have a compatible service number, not sure what happens then....
Joined: Apr 2010
Posts: 12,601
From: Mentor, Ohio
You would need to find a way to look up the interchange numbers on them. I have a DHP chart and it does not show an interchange for '03 (but that might be a DHP thing).
Based on your statement, I assume the service numbers don't match??
Based on your statement, I assume the service numbers don't match??
Joined: Apr 2010
Posts: 12,601
From: Mentor, Ohio
If you don't mind, can you list the service numbers from your stock PCM and then the ones from the Reptile PCM?
I can try and see if there is any interchange data on the subject.
You may also want to PM Reptile on the GP forum. I have not been on the GP forum in a while, but as I recall, he was a helpful guy. I'm sure he is willing to help with a service he provided you.
I can try and see if there is any interchange data on the subject.
You may also want to PM Reptile on the GP forum. I have not been on the GP forum in a while, but as I recall, he was a helpful guy. I'm sure he is willing to help with a service he provided you.
