Refer to Emission Hose Routing Diagram Circuit Description The mass air flow (MAF) sensor measures the amount of air entering the engine during a given time. The PCM uses the mass air flow information to monitor EGR flow rates. A large quantity of air entering the engine indicates an acceleration, high load situation or no… Read More »
Refer to Emission Hose Routing Diagram Circuit Description The mass air flow (MAF) sensor measures the amount of air entering the engine during a given time. The PCM uses the mass air flow information to monitor EGR f l ow rates. A large quantity of air entering the engine indicates an acceleration, high load situation… Read More »
Circuit Description The PCM uses a calibrated resistor mounted internally in the injection pump to determine fuel rates. The resistor value is stored in the PCM memory. If the PCM memory has been disturbed or the PCM has been replaced, the PCM will relearn the resistor value on the next ignition cycle. Conditions for Running… Read More »
Circuit Description The injection pump delivers fuel to individual cylinders by opening and closing a solenoid control fuel valve. The PCM monitors the amount of time it takes for the fuel solenoid valve to physically close after commanded to close. Closure time out of range is seen as a fault. This response time is measured… Read More »
Circuit Description The injection pump delivers fuel to individual cylinders by opening and closing a solenoid control fuel valve. The PCM monitors the amount of time it takes for the fuel solenoid valve to physically close after commanded to close. Closure time out of range is seen as a fault. This response time is measured… Read More »
Circuit Description The PCM has the abil ity to determine the amount of offset needed to bring the engine to top dead center. This is used by the PCM to determine proper injection time. Conditions for Running the DTC The ignition switch in the ON position. Conditions for Setting the DTC • The TDC offset… Read More »
Circuit Description The mass air flow (MAF) sensor measures the amount of air entering the engine during a given time. The PCM uses the mass air flow information to monitor EGR flow rates. A large quantity of air entering the engine indicates an acceleration or high load situation, while a small quantity of air indicates… Read More »
Circuit Description The accelerator pedal position (APP) module provides a voltage signa l that changes relative to accelerator pedal position. There are three sensors located within the APP module that are scaled differently. Conditions for Running the DTC The ignition switch in the ON position. Conditions for Setting the DTC The PCM has recognized an… Read More »
Circuit Description The TCC normally closed cruise brake switch supplies a B+ signal on the Brake Switch Input circuit to the PCM. The circuit is opened when the brakes are applied. The stop lamp/cruise control normally open brake switch supplies a B+ signal on the Stoplamp Switch Input circuit to the PCM when the brake… Read More »
Circuit Description The cruise set/coast switch is an input to the fuel control portion of the PCM. These inputs allow the PCM to control and hold a requested speed. The cruise set/coast switch sends an ignition voltage signal to the PCM when the set/coast switch is ON. Conditions for Running the DTC • The PCM… Read More »