Non-Monitored Circuits, Systems and Conditions

NOTE:
The following circuits, systems and conditions that cause driveability problems are not monitored by the engine controller. Fault codes may not be displayed for these areas, but problems with them may cause fault codes to be displayed for other systems. For example, a fuel injector problem will not yield a fault directly, but could cause a rich or lean fuel mixture condition. This could cause an oxygen sensor fault to be stored in the engine controller.

NON-MONITORED CIRCUITS

Cylinder Compression - The engine controller cannot detect uneven, high, or low engine cylinder compression.

Engine Controller Connector Engagement - The engine controller cannot tell if connector pins are spread or damaged, but a fault code may be set as a result of this condition.

Engine Controller System Ground - The engine controller has no way of determining a poor system ground, but a fault may be generated if a poor system ground condition exists.

Engine Timing - The engine controller cannot tell if a cam gear, crank gear, or fuel injection pump is indexed incorrectly. Any of the previous problems could result in a no start or poor running condition.

Exhaust System - The engine controller cannot determine or detect if an exhaust system is plugged, restricted, or leaking.

Fuel Pressure - Fuel pressure is controlled by the fuel injection pump. The engine controller cannot determine if the fuel pump pressure is too low or high, if the inlet or return lines are pinched or restricted, or if the fuel pump filter is clogged or restricted.

Fuel Injector Malfunctions - The engine controller cannot determine if the wrong injector has been installed, if the pintle is clogged or stuck, or if the injector tip has completely worn out.