Test Description

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

1. 1
   
   Ensure you perform the I/M System Check before performing this test. See INSPECTION/MAINTENANCE SYSTEM CHECK . Failure to do so may result in difficulty updating the status to YES.
2. 2
   
   The catalyst test runs during the idle period immediately following the cruise period.
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 the DTC becomes a Malfunction Indicator Lamp (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. This information is located in the service information under Conditions for Running DTC.
5. 5
   
   The I/M System Status only reports on whether or not a diagnostic has run, not what the outcome of the test was. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.