Description The crankshaft sensor is located in the front cover. The sensor is positioned over the crankshaft sprocket and consists of a Hall-effect device and…
Category: GM 6.5
OPTICAL SENSOR Description The optical sensor is located in the fuel injection pump (figure 5-36) and includes the fuel temperature sensor. The optical sensor counts…
PCM timing control uses input data from the Accelerator Pedal Position (APP) sensors, intake air temperature sensor, optical sensor, and crankshaft position sensor (engine speed)…
Description The “Service Throttle Soon” (STS) in the instrument panel alerts the driver to conditions in the accelerator pedal position (APP) circuit that require attention.…
Description The A/C signal comes from the A/C-heater control head in the vehicle and informs the PCM that the driver has turned the air conditioner…
Description The fuel temperature sensor is part of the optical sensor (see figure 5-36). It is a thermistor that controls signal voltage to the PCM.…
Description The Engine Shutoff (ESO) solenoid is located on the injection pump (figure 5-30). When the ignition switch is “OFF,” the ESO solenoid is in…
The PCM has the ability to increase and decrease the amount of fuel to each cylinder to provide smooth idle operation. If the fuel correction…
Fuel Solenoid Driver Circuit Operation The fuel solenoid driver receives an inject-command signal from the PCM on CKT 984 (figure 5-29). The driver provides current-regulated…
Description The 6.5L EFI PCM uses Accelerator Pedal Position (APP) sensors to control fuel delivery as requested by driver demands at the accelerator pedal. Three…