C8.7 Marine Engine Sensors and Electrical Components Caterpillar


Sensors and Electrical Components
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1.1. Failure of Sensors
2.2. All Sensors



Illustration 1g03704595

(1) Low-pressure fuel pressure sensor

(2) Engine speed sensor

(3) Oil filter clogging switch

(4) Electronic Control Module (ECM)

(5) Coolant temperature sensor

(6) 70 pin connector

(7) Service connector

(8) Engine control panel - left-hand mounted (if equipped)




Illustration 2g03707155

(8) Engine control panel - right-hand mounted (if equipped)

(10) ECM controlled belt driven compressor clutch

(11) Supercharger speed sensor

(12) Intake heater relay

(13) Intake heater

(14) Oil temperature and pressure sensor

(15) Fuel pressure sensor




Illustration 3g03704597

(16) Crankcase pressure sensor

(17) Air inlet manifold temperature and pressure sensor

(18) Camshaft timing sensor

(19) Fuel filter clogging switch

(20) Fuel temperature sensor

(21) Inlet air temperature and pressure sensor

(22) Fuel injector

(23) Common rail fuel pressure sensor

Failure of Sensors

All Sensors

A failure of any of the sensors may be caused by one of the following malfunctions:

  • Sensor output is open.

  • Sensor output is shorted to "- battery" or "+ battery".

  • Measured reading of the sensor is outside of the specification.

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