Operation Manual

Continuous Tests
The Continuous Tests section displays whether or not your vehicle supports each
continuous test, and if it does, whether or not the test has been successfully completed.
Misfire Monitoring
Misfire monitoring shall be supported on both spark ignition and compression vehicles
if the vehicle utilizes a misfire monitor. Misfire monitoring shall always indicate
complete for spark ignition engines. Misfire monitoring shall indicate complete for
compression ignition engines after the misfire evaluation is complete.
Fuel System Monitoring
Fuel system monitoring shall be supported on vehicles that utilize oxygen sensors for
closed loop fuel feedback control, and utilize a fuel system monitor, typically spark
ignition engines. Fuel system monitoring shall always indicate complete for both spark
ignition and compression ignition engines.
Comprehensive Component Monitoring
Comprehensive component monitoring shall be supported on spark ignition and
compression ignition vehicles that utilize comprehensive component monitoring.
Comprehensive component monitoring shall always indicate complete on both spark
ignition and compression ignition engines.
Non-Continuous Tests
The Non-Continuous Tests section displays whether or not your vehicle supports each
non-continuous test, and if it does, whether or not the test has been successfully
completed. Following is a list of the available non-continuous tests:
 Catalyst Monitoring
 Heated Catalyst Monitoring
 Evaporative System Monitoring
 Secondary Air System Monitoring
 A/C System Refrigerant Monitoring
 Oxygen Sensor Monitoring
 Oxygen Sensor Heater Monitoring
 EGR System Monitoring
Fuel System Status
The fuel system 1 & 2 status sections each display the status of the respective fuel
system. A fuel system can be in one of the following five states:
1. Open Loop – Has not yet satisfied conditions to go closed loop.
2. Closed Loop – Using oxygen sensor(s) as feedback for fuel control.
3. Open Loop – Open loop due to driving conditions (e.g., power enrichment,
deceleration enleanment).
4. Open Loop – Detected system fault.
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