PLUNGER AS-LEVEL 7V5542 - Caterpillar

Your engine may be equipped with various optional engine features and controls that are not pictured here. This section discusses the general information about various features and the engine control systems.
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(1) Secondary speed/timing sensor
(2) Primary speed/timing sensor
(3) Turbocharger outlet pressure sensor
(4) Atmospheric pressure sensor
(5) Fuel pressure sensor
(6) Fuel temperature sensor
(7) Inlet manifold air temperature sensor
(9) TDC probe connector Coolant Temperature Sensor
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Location of the engine coolant temperature sensor
The engine coolant temperature sensor monitors the temperature of the engine coolant. The coolant temperature signal is sent to the Electronic Control Module (ECM) for engine monitoring and for improved engine control. The signal is used by the ECM for all of the following engine functions:
Engine timing control
Engine operating mode
Engine protectionThe ECM is capable of adjusting the engine timing relative to the engine operating temperature. The concept of dynamic timing provides the engine with the ability to control exhaust emissions. Timing control also aids in white smoke cleanup during cold engine operation.The ECM also uses the signal from the engine coolant temperature sensor to determine the mode of operation for the engine. Several aspects of engine operation are affected by the engine operating mode: acceleration ramp rates, engine timing and fuel injector timingCoolant Temperature Protection
Excessive engine coolant temperature is an undesirable operating condition. Serious damage to the engine can result if an engine is allowed to overheat. If the engine coolant temperature increases to excessive levels, the engine monitoring system will initiate actions that will protect the engine from damage.Coolant Level Sensor
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Location of the coolant level sensor
The coolant level sensor is an optional sensor. This sensor monitors the engine coolant level in the cooling system expansion tank. The coolant level sensor signal is sent to the ECM for the purpose of engine monitoring.Engine Oil Pressure Sensor
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Location of the engine oil pressure sensor
The engine oil pressure sensor provides an oil pressure signal to the Electronic Control Module (ECM) for the purpose of engine monitoring. The electronic signal is compared to an Oil Pressure Map that is stored in ECM memory. The Oil Pressure Map is derived from a direct relationship between engine speed and the oil pressure that is expected at that speed. The engine monitoring system records a low engine oil pressure condition in ECM memory if the sensor value is not within the proper range. The monitoring system then initiates protective measures.Low Oil Pressure Protection
When a low oil pressure condition exists in the engine, there is a possibility of damage to major engine components. Low oil pressure protection is a safety feature that will take the necessary measures in order to initiate an engine shutdown in the event of a low oil pressure condition.Fuel Temperature Sensor
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Location of the fuel temperature sensor
The fuel temperature sensor monitors the inlet fuel temperature. The Electronic Control Module (ECM) utilizes the signal from the fuel temperature sensor to provide fuel temperature compensation for the engine fuel control system. Fuel temperature compensation provides the following benefits:
Rated engine horsepower regardless of fuel temperature
Highly