Non-Monitored Circuits

Powertrain Control Module (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 Diagnostic Trouble Codes (DTC) for other systems or components.

For example, a fuel pressure problem will not cause a DTC directly, but could cause a rich/lean condition or misfire which may cause PCM to store a DTC. The major non-monitored circuits are identified below.

• Cylinder Compression
• Engine Timing
• Excessive Oil Consumption
• Exhaust System
• Fuel Injectors
• Fuel Pressure
• Fuel Requirements
• PCM Connector Engagement
• PCM Grounds
• Secondary Ignition System
• Throttle Body Airflow
• Vacuum Assist