The VGT actuator is mounted on the top of the turbocharger. The VGT actuator is commanded by the PCM, based on engine speed and load. The magnetic field generated by this signal moves a shaft in the control valve. A cam follower at the end of the valve assembly provides feedback to the valve, allowing… Read More »
The fuel injectors are connected to the high pressure fuel rail and deliver a calibrated amount of fuel directly into the combustion chamber. The on and off time of the fuel injectors are controlled by the piezo actuator device, which allows extreme precision during the injection cycle. The piezo actuator is commanded on by the… Read More »
The fuel VCV is mounted on the high pressure fuel pump. The PCM controls the volume of low pressure fuel that enters the inlet one-way check valve and two main pump pistons by activating the fuel VCV. The PCM regulates fuel volume by controlling the on/off time of the fuel VCV solenoid. A high duty… Read More »
The PCV is threaded into the rear of the left fuel rail. The PCM controls the fuel rail pressure by modulating the PCV which regulates the fuel rail pressure. The PCM regulates fuel rail pressure by controlling the on/off time of the PCV solenoid. A high duty cycle indicates a high fuel rail pressure is… Read More »
A duty cycle is applied to the solenoid from the PCM to turn vacuum to the actuator on or off. This change causes the EGR cooler bypass door to move. The EGR cooler bypass solenoid changes the state of the EGR cooler bypass door to either allow exhaust gases to bypass the EGR cooler or… Read More »
The EGR valve is an electric DC motor controlled by the PCM. The valve is powered in both the open and closed positions. The EGR valve is opened to allow exhaust gases to mix with the intake air for NOx emissions purposes. IDS: EGR_A_CMD (%)
The intake throttle body has an electric DC motor to move the throttle plate. The intake throttle body is controlled by the PCM. The valve is powered in both the open and closed positions. The intake throttle body helps create the delta pressure difference between intake and exhaust for EGR flow, regeneration and shutdown noise.… Read More »
The WIF sensor monitors the water level within the DFCM to determine if the water reservoir requires draining. The PCM notifies the customer when the water needs to be drained from the DFCM to protect the high pressure fuel system. IDS: WIF (yes/no)
The NOx sensor is mounted next to the EGT14 sensor. The NOx sensor monitors the amount of NOx out of the tailpipe. The PCM uses the information to adjust how much reductant is being injected into the exhaust as well as an input for fuel trim. The information from the NOx sensor can also tell… Read More »
The APP is a 2-track position pedal. The pedal has 2 potentiometers providing pedal position to the PCM. This is a safety feature. IDS: APP1 (volts) and APP1 [APP_D] (%) IDS: APP2 (volts) and APP2 [APP_E] (%)