System Status and Drive Cycle

Inspection/Maintenance Status Reset Procedures

System Status For Satisfying the Federal Inspection/Maintenance (I/M) Regulations.

The scan tool System Info menu includes the System Status selection.

Several states require that the vehicle pass on-board (OBD II system) tests for the major diagnostics prior to having a vehicle I/M emission inspection. Some areas may require that the vehicle pass the OBD II system tests and the I/M emission inspection in order to renew license plates.

Using a scan tool, the technician can observe the System Status (Complete or Not Complete) in order to verify that the vehicle meets the criteria which complies with the local area requirements. Using the System Status display, monitor any of the following systems or a combination of the systems (depending on vehicle make and model) for I/M Readiness:

^ Three Way Catalyst

^ Heated Oxygen Sensor (HO2S)

^ Heated Oxygen Sensor (HO2S) Heater

^ Exhaust Gas Recirculation (EGR)

^ Evaporative Emission ([1][2]EVAP)

^ 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 is 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 (more than one drive cycle may be needed) to use as a guide to complete the I/M 240 System Status tests.

Following a DTC info clear, a battery disconnect or a Control Module replacement, all System Status information will clear.