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Home >> Chevrolet >> 2006 >> HHR LS, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Computer/Integrating Systems) >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Class 2 Device >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2005 Pontiac Pursuit and 2005 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The PCM is the only module on the class 2 serial data buss on this vehicle. The most likely cause of the buss failure will be a short or open.