Test Description

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

1. 1  - Ensure 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 to maintain a high, steady MAP signal.
3. 3  - This step identifies a first failure of a type "B" DTC. A DTC only appears on the I/M System Status display when the DTC 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. Refer to DIAGNOSTIC AIDS .
4. 4  - This step helps identify any unique or unusual criteria required to run the diagnostic test in the event the universal set procedure does not.
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.