Service of the PCM shoul d normally consist of replacement of the PCM. If the diagnostic procedures call for replacing the PCM, peform the following…

Refer to Glow Plug Controls. Circuit Description The glow plug system is used to assist in providing the heat required to begin combustion during engine…

Caution: When testing nozzles, do not place your hands or arms near the tip of the nozzle. The high pressure atomized fuel spray from a…

Always begin diagnosis of the electronic fuel injection system with the On-Board Diagnostic (OBD) System Check before proceeding to any other diagnostics. This will reduce…

Circuit Description The fuel manager/filter assembly consists of the fuel heater, the water in fuel sensor and a filter. The filter contains the coalescer (the…

Circuit Description The fuel manager/filter assembly consists of the fuel heater, the water in fuel sensor and a filter. The filter contains the coalescer (the…

The diagnosis of fuel odor may be a condition of leaking fuel tank, filler neck or filler cap. A defective filler cap, a plugged or…

Circuit Description The cruise control multi function lever is wired directly to the PCM. The cruise on/off, set/coast and resume/accel signals are inputs to the…

Before Using This Section Before using this section, you shou l d have performed the On-Board Diagnostic System Check and determined that : 1. The…

Circuit Description The PCM monitors the serial data (class II) circuit for communications from the Passlock/EVO controller. If the Passlock/EVO controller is not communicating with…