Diagnostic Aids

The I/M system Status display provides an indication of when the control module 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 under Inspection/Maintenance System DTC 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.