The red Oil and Water Lamp (OWL) and the Engine Alarm Buzzer are intended to be turned on when conditions are present that will cause impending damage to the engine. The level of protection is dependent upon which Engine Warning and Protection System (EWPS) is turned on in the ECM. When the ignition switch is… Read More »
The Manifold Absolute Pressure (MAP) sensor is a variable capacitance sensor that operates on a 5 volt reference signal from the ECM to produce a linear analog voltage signal that indicates pressure. For the MAP sensor function diagram, see Figure “Manifold Absolute Pressure Sensor Function Diagram” . Figure 1. Manifold Absolute Pressure Sensor Function Diagram… Read More »
The Idle Shutdown feature is an optional feature that allows the ECM to shut off the engine if an idle condition has been detected for more than a customer specified programmed period (2 to 120 minutes). Prior to engine shutdown, the Oil/Water Lamp (red) will flash for 30 seconds to warn the driver of the… Read More »
The Injection Control Pressure Regulation System (IPR_SYS) consists of the low pressure oil lubrication system, passages in the front cover and reservoir, high pressure oil pump, high pressure oil line, as well as the high pressure oil rail that is mounted on the side of the cylinder head. The system also includes the injectors and… Read More »
The Injector Pressure Regulator (IPR) is a variable position valve that controls injection control pressure. The ECM uses many input variables to determine the desired injection control pressure. For the IPR function diagram, see Figure “Injection Pressure Regulator Function Diagram” . Figure 1. Injection Pressure Regulator Function Diagram Section 33.1.1 Output Functions Battery voltage is… Read More »
Signal functions include High Side Drive Outputs and Low Side Drive Return. For the Injector Drive Circuit (INJ) function diagram, see Figure “Injector Drive Circuit Function Diagram” . Figure 1. Injector Drive Circuit Function Diagram High Side Drive Outputs — The high side drive outputs control the individual injector on-time, injection timing and sequencing (firing… Read More »
The Injection Control Pressure (ICP) sensor is a variable capacitance sensor that, when supplied with a 5 volt reference signal from the ECM, produces a linear analog voltage signal that indicates pressure. The ICP sensor’s primary function is to provide a feedback signal to indicate injection control pressure to enable the ECM to command the… Read More »
The Intake Air Temperature (IAT) sensor is a thermistor type sensor that has a variable resistance that changes when exposed to different temperatures. When interfaced with the ECM, it produces a 0–5 volt analog signal that will deduce temperature. For IAT sensor function diagram, see Figure “Intake Air Temperature Sensor Function Diagram” . Figure 1.… Read More »
The Engine Oil Temperature (EOT) sensor is a thermistor type sensor that has a variable resistance that changes when exposed to different temperatures. When interfaced with the ECM, it produces a 0 to 5 volt analog signal that indicates temperature. For the EOT sensor function diagram, see Figure “Engine Oil Temperature Sensor Function Diagram” .… Read More »
The Engine Oil Pressure (EOP) sensor is a variable capacitance sensor, that when supplied with a 5 volt reference signal from the ECM, produces a linear analog voltage signal that indicates engine oil pressure. For the EOP sensor function diagram, see Figure “Engine Oil Pressure Sensor Function Diagram” . Figure 1. Engine Oil Pressure… Read More »