Diagnostic Aids

WARNING: This page is about a different car, the 2002 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM.

Use the J 35616-A Connector Test Adapter Kit for any test that requires probing the PCM or probing a component harness connector. Using this kit prevents damage to the harness and component terminals.

This diagnostic only runs once per ignition cycle.
A malfunction in the HO2S heater circuits causes a DTC to set. Check the HO2S heater circuits for intermittent opens and for poor connections.
An oxygen supply inside the HO2S is necessary for proper operation. The HO2S wires provide the supply of oxygen. Inspect the HO2S wires and the connections for breaks or for contamination.
If an intermittent condition exists, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.