GASKET 2N8204 - Caterpillar

The GSC+/GSC+P monitors the following engine sensors that are listed below.
Pressure Sensor (Engine Oil) for MUI and PEEC engines
Temperature Sensor (Engine Coolant) for MUI and PEEC engines
Optional Liquid Level Sensor (Engine Coolant) for all engines
Optional Temperature Sensor (Engine Oil) for all engines
Speed Sensor (Engine) for all enginesNote: On MUI and PEEC engines, all of the listed sensors are connected directly to the GSC+. On EUI engines, the oil pressure sensor and coolant temperature sensor are connected to the engine ECM instead of the GSC+. The engine ECM sends the data from these two sensors to the GSC+ for display purposes. Refer to Troubleshooting, SENR1003, "3500B EPG Engines" or Troubleshooting, RENR2227, "3406E EPG Engines" for information on these two sensors.Pressure Sensor (Engine Oil)
Note: This description applies only to MUI and PEEC engines.
Illustration 1 g00311286
Engine Oil Pressure SensorThe 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 P003, P004, P012, P013 and P014. See Systems Operation, "Engine Generator Programming OP5-0".Temperature Sensor (Engine Coolant)
Note: This description applies only to MUI and PEEC engines.
Illustration 2 g00310269
Engine Coolant Temperature SensorThe 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