Modules Do Not Show Active Status
WARNING: This page is about a different car, the 1997 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
- Check for DTCs U1128, U1176, U1255, U1300 and U1301. See BCM DTC DEFINITION . If any DTCs exist, see appropriate test under DIAGNOSIS & REPAIR . If no DTCs exist, go to next step.
- After a certain time period, it is normal for class 2 serial data line to become inactive. Using key fob, lock all doors. Class 2 serial data line show now show active.