Diagnostic Aids

I/M System Status display provides an indication of when PCM has completed required tests. This does not mean test has passed, only that a decision was made. If diagnostic fails, a DTC will indicate failure. If failure indication is present for a DTC associated with one of the I/M regulated systems, failure may prevent other required tests from running. Example: a DTC for control circuit of the relay controlling an AIR pump may not be listed in INSPECTION/MAINTENANCE SYSTEM DIAGNOSTIC TROUBLE CODES table because DTC is a continuous test. If this DTC is set, active tests for 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.