Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The I/M system Status display provides an indication of when the Powertrain Control Module (PCM) has completed the required tests. This does not necessarily mean that the test has passed, only that a decision was made. If the diagnostic fails, a DTC will indicate the failure. If a failure indication is present for a DTC associated with one of the I/M regulated systems, it may prevent other required tests from running. For example, a DTC for the control circuit of the relay controlling an AIR pump may not be listed in the I/M system DTC table because it is a continuous test. If this DTC is set, the Active Tests for the AIR system may not run.

The I/M system status information may be useful for a technician to determine if diagnostics have run when verifying repairs.