System Status and Drive Cycle For Inspection/Maintenance

The System Status selection is included in the scan tool System Info menu.

Several states require that the I/M 240 (OBD II system) pass on-board tests for the major diagnostics prior to having a vehicle emission inspection. This is also a requirement to renew license plates in some areas.

Using a scan tool, the technician can observe the System Status in order to verify that the vehicle meets the criteria to comply with the local area requirements. Using the System Status display, any of the following systems, or combination of systems, may be monitored for I/M readiness:
^ The 3-way catalytic converter
^ The Heated Oxygen Sensors (HO2S)
^ The Heated Oxygen Sensor (HO2S) heaters
^ The Exhaust Gas Recirculation (EGR) system
^ The fuel trim system

IMPORTANT: The System Status display indicates only whether or not the test has been completed. The System Status display does not necessarily mean that the test has passed. If a Failed Last Test indication is present for a DTC associated with one of the above systems, that test failed. Diagnosis and repair is necessary in order to meet the I/M 240 requirement. Verify that the vehicle passes all of the diagnostic tests associated with the displayed System Status prior to returning the vehicle to the customer. Refer to the Typical OBD II Drive Cycle table as a guide to complete the I/M 240 System Status tests.

Following a DTC into clear, a battery disconnect, or a control module replacement, all System Status information will clear.