Non-Monitored Circuits
PCM does not monitor all circuits, conditions and systems that could cause a malfunction or driveability problem. However, problems with these systems may cause PCM to store DTCs for other systems or components.
As an example a fuel pressure problem will not identify a fault directly, but could cause a rich/lean condition or misfire. This could also cause PCM to store an oxygen sensor DTC. The major non-monitored circuits are identified below:
- Cylinder Compression
- Excessive Oil Consumption
- Exhaust System
- Fuel Injector Mechanical Faults
- Fuel Pressure
- PCM Connector Engagement
- PCM System Ground
- Secondary Ignition System
- Throttle Body Airflow
- Vacuum Assist
NOTE:
All models are equipped with On-Board Diagnostics II (OBD-II).