The purpose of this procedure is to satisfy the enable criteria necessary to execute an inspection/maintenance (I/M) system monitor for the secondary air injection (AIR) system. The system monitor is comprised of the test results from one or more DTCs. This procedure may be used to set the AIR I/M System Status display on the scan tool to YES. The AIR I/M System Status display indicates whether or not the control module has completed the system monitor. The system monitor completes when either all DTCs comprising the monitor run and pass, or any DTC comprising the monitor illuminates the malfunction indicator lamp (MIL). If one of the DTCs comprising the monitor is set and the MIL is not illuminated, the necessary trips are required to illuminate the MIL before the monitor will complete. Once the monitor completes, the AIR I/M System Status display will update to YES.

The AIR pumps generally operates once per ignition cycle, usually upon initial start up before the engine goes into Closed Loop fuel control. Some systems will perform a Passive Diagnostic Test at this time. The Active Diagnostic Test is performed after the engine goes into Closed Loop fuel control. On vehicles that perform a Passive Test, the Active Test will only run if the Passive Test fails or is indeterminate. The Active Test may not run if the Passive Test passes.

If there is an impending failure, the system may require more time to run the diagnostic than was allotted in the set procedure. If the test does not run after numerous attempts and no DTC is set, review the appropriate scan tool data list and the service information for an indication of why the test does not complete. Some tests may abort due to changes in the conditions while the test is running. For example, changes in engine load such as a cooling fan or an A/C compressor clutch turning ON may cause the test to abort.

If the AIR I/M System Status does not update to YES, the procedure can be repeated until a YES status is achieved.