For 1990-2009 cars only
Info - Intermittent PCM Lockup when Performing On Vehicle PCM Reprogramming
| Subject: | Intermittent PCM Lockup When Performing On-Vehicle PCM Reprogramming |
| Models: | 1999 Chevrolet Venture |
| 1999 Oldsmobile Silhouette |
| 1999 Pontiac Montana |
| with 3.4L Engine (VIN E -- RPO LA1) |
When performing an on-vehicle PCM reprogramming, a PCM lockup may occur.
The Pass Key® III module may intermittently "wake up" during PCM programming and cause interference on the class II data line.
To prevent a lockup from occurring, remove the PASS Key® fuse using the following procedure. Refer to the figure below.
- Locate the passenger compartment fuse center (1).
- Remove the 10 amp PASS Key® fuse from the instrument panel fuse center before attempting on vehicle PCM reprogramming (2).
- After PCM programming is completed, reinstall the 10 amp PASS Key® fuse (2).
This will prevent the Pass Key® III module from interrupting the class II data line during the programming procedure.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J6355 | PROM -- Reprogramming -- On Car | Use Published Labor Time |
