The scan tool System Info menu includes the System Status selection.
Several states require that the vehicle pass OBD ll 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 Complete or Not Complete System Status in order to verify that the vehicle meets the criteria which comply with the local area requirements. Use the System Status display in order to monitor any of the following systems or to monitor a combination of the systems, depending on vehicle make and model, for I/M Readiness:
• | The catalyst |
• | The heated oxygen sensor (HO2S) |
• | The heated oxygen sensor (HO2S) heater |
• | The exhaust gas recirculation (EGR) |
• | The evaporative emissions (EVAP) |
• | The secondary air injection system (AIR) |
Important: The System Status display indicates only whether the PCM has completed the required DTC tests. The System Status display does not necessarily mean that the test has passed. If a failure indication is present for a DTC that is associated with one of the above systems, that test has failed. Diagnosis and repair are necessary in order to meet the I/M requirement. Prior to returning the vehicle to the customer, verify that the vehicle passes all of the diagnostic tests that are associated with the displayed System Status.
Following a DTC Info Clear, a battery disconnect, or a control module replacement, all of the System Status information will be set to Not Complete.
Refer to the diagnostic support information that is associated with each DTC in order to obtain the Conditions for Running the DTC. The vehicle operating conditions that the system must meet in order for a DTC to run are the Conditions for Running the DTC.
The System Status table shows the DTCs that must run in order for the System Status to indicate a system test has been Completed.
System Status | DTC(s) Used to Set System Status |
---|---|
Catalyst | P0420 |
HO2S | P0133, P1133 and P1134, |
HO2S Heater | P0135 and P0137 |
EGR System | P0401 |
EVAP System | P0440, P0442, P0446, P1441, or the Service Bay Test |
AIR System | P0410, P0412, P0418 |