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Home >> Cadillac >> 1997 >> Catera >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Trouble Shooting >> Modules Do Not Show Active Status
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Modules Do Not Show Active Status

  1. 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.
  2. 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.