I/M HO2S/O2S System Set
INSPECTION/MAINTENANCE (I/M) HEATED OXYGEN SENSOR/OXYGEN SENSOR (HO2S/O2S) SYSTEM SET PROCEDUREDESCRIPTION
The purpose of this procedure is to satisfy the enable criteria necessary to execute an inspection/maintenance (I/M) system monitor for the system monitor for the heated oxygen sensor/oxygen sensor (HO2S/O2S) system. The system monitor is comprised of the test results from one or more DTCs. This procedure may be used to set the HO2S/O2S I/M System Status display on the scan tool to YES. The HO2S/O2S 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 HO2S/O2S I/M System Status display will be updated to YES.
CONDITIONS FOR RUNNING
- The engine coolant temperature (ECT) is more than 75°C (167°F).
- The battery voltage is between 10- 18 volts.
DIAGNOSTIC AIDS
If the status does not update, the test outlined in this procedure can be repeated until the I/M System Status updates to YES.
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.
TEST
