Test Description

The numbers below refer to the step numbers on the diagnostic procedure.

1. 1 -  Make sure you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
2. 2 -  The EGR Active Tests are run during a gradual deceleration with a closed throttle. The vehicle speed is required in order to maintain a high, steady MAP signal.
3. 3 -  This step is to identify a first failure of a type "B" DTC. A DTC only appears on the I/M System Status display when it becomes a MIL illuminating DTC. This occurs on the second failure of a type "B" DTC. A first failure of a type "B" DTC will not allow the I/M System Status to update to YES. See DIAGNOSTIC AIDS .
4. 4 -  This step is to help identify any unique or unusual criteria required to run the diagnostic test in the event the universal set procedure does not. See CONDITIONS FOR RUNNING .
5. 5 -  The I/M System Status only reports on whether or not a diagnostic has run, not the outcome of the test. If any Emission Related DTC sets after the tests are complete, the DTC will require diagnosis.