Diagnostic Aids
WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
A thorough inspection of wiring and connectors is important to prevent misdiagnosis. Check for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or damaged wiring harness. An intermittent may be caused by a poor connection, rubbed-through wire insulation, or a broken wire inside insulation.
The following are possible causes of DTC:
- Open in delivered torque circuit.
- Short to ground or voltage in delivered torque circuit.
- Communication frequency problem.
- Communication duty cycle problem.
- Wiring problem, terminal corrosion, or poor connections in delivered torque circuit.
- EBCM not receiving information from PCM.