VALVE-INLET 2W6988 - Caterpillar

The GSC monitors the engine sensors. The sensors for MUI engines are listed below.
Pressure Sensor (Engine Oil)
Temperature Sensor (Engine Coolant)
Fluid Level Sensor (Engine Coolant)
Speed Sensor (Engine)Pressure Sensor (Engine Oil)
Note: This description is for MUI engines.
Illustration 1 g00593652
Pressure Sensor (Engine Oil)The engine oil pressure sensor is an input of the GSC. The sensor tells the GSC the current engine oil pressure. The GSC shows the engine oil pressure on the lower display and the GSC also uses the sensor information to determine when a low engine oil pressure fault exists. The engine oil pressure sensor is mounted on the outside of one of the engine oil galleries. The engine model determines the exact location of the engine oil pressure sensor.The engine oil pressure sensor is a pulse width modulated sensor. This sensor continuously generates a PWM signal. The duty cycle of the PWM signal varies from 10 to 90%. The duty cycle varies proportionally to the oil pressure of the engine. The GSC receives the PWM signal. The GSC measures the duty cycle in order to determine the oil pressure of the engine. The base frequency of the signal is constant at 500 150 Hz. The signal wire of the oil pressure sensor connects to connector contact 8 of the GSC. The signal wire of the oil pressure sensor is found on connector contact "C". The sensor is supplied operating power (8 DCV) at connector contact "A" from the GSC (connector contact 9).There are five setpoints that are related to engine oil pressure. The setpoints that are programmed into the GSC are P03, P04, P12, P13 and P14. See Systems Operation, "Engine/Generator Programming OP5".Temperature Sensor (Engine Coolant)
Note: This description is for MUI engines.
Illustration 2 g00310269
Temperature Sensor (Engine Coolant)The engine coolant temperature sensor is an input of the GSC. The engine coolant temperature sensor tells the GSC the engine coolant temperature. The GSC shows the engine coolant temperature on the lower display. Also, the GSC uses the information from the sensor in order to determine when a high coolant temperature fault exists or a low coolant temperature fault exists. The engine coolant temperature sensor is mounted in the water jacket. The sensor is usually mounted toward the front of the engine. The exact location depends on the engine model.The engine coolant temperature sensor is a pulse width modulated sensor (PWM). This sensor continuously generates a PWM signal. The duty cycle of the signal varies from 10 to 95% in proportion to the coolant temperature of the engine. The GSC receives the PWM signal and the GSC measures the duty cycle in order to determine the coolant temperature of the engine. The base frequency of the signal is constant at 455 Hz (370 to 550 Hz). The signal wire of the coolant temperature sensor connects to connector contact 7 of the GSC. The signal wire is found at connector contact "C" of the sensor. The sensor is supplied operating power (8 DCV) at connector contact "A" from the GSC connector contact 9.There