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Home >> Buick >> 1998 >> Century Custom >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnostic Tests >> DTC U1255: Loss Of Class 2 Serial Data Fault (General) >> Diagnostic Aids

Diagnostic Aids

The following conditions may cause an intermittent: Intermittent open in circuit No. 1132 (Purple wire) or No. 1037 (Light Green wire), poor connections at BCM, PCM or splice pack SP205, or internal open in BCM. BCM may store DTC U1255 if certain diagnostics are performed between PCM and DLC.