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 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 System Status (Complete or Not Complete) 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 a combination of the systems (depending upon 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 if the PCM has completed the required tests (DTCs). The System Status display does not necessarily mean that the test has passed. If a failure indication is present for a DTC associated with one of the above systems, that test has failed. Diagnosis and repair are necessary in order to meet the I/M 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.
Following a DTC Info Clear, a battery disconnect, or a control module replacement, all of the System Status information is set to Not Complete.
Refer to the diagnostic support information 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, P0153, P1133, P1134, P1153, and P1154 |
HO2S Heater | P0135, P0147, and P0155 |
EGR System | P0401 |
EVAP System | P0440, P0442, P0446, P1441, or the Service Bay Test |
Scan Tool Tests
The scan tool tests for some systems, depending upon the vehicle make and model, include the Service Bay Tests. Use the Service Bay Tests in order to test certain systems and reset the System Status to Complete. The EVAP Service Bay Test is included for this vehicle. Refer to Service Bay Test for important preliminary instructions.
