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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Body Control Modules) >> Diagnostic Tests >> DTC U1000 & U1255: Class 2 Communication Malfunction >> Code Enable Criteria

Code Enable Criteria

WARNING: This page is about a different car, the 2001 GMC Safari and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

Following condition must be met in order for DTC U1000 and U1255 to set; at least one critical operating parameter has not been associated with an identification number within about 5 seconds after beginning serial data communication.

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