0313785 JOHNSON GROMMET

Sensor Locations for the Engine
The illustrations in this section show the typical locations of the sensors for the industrial engine. Specific engines may appear different from the illustration due to differences in applications.
Illustration 1 g06412157
Typical example of the sensor locations on the left side of the engine
(1) Fuel pressure sensor
(2) Water in fuel switch
(3) Inlet manifold temperature sensor
(4) Boost pressure sensor
(5) Electronic pressure relief valve
(6) Temperature Sensor for the NOx Reduction System (NRS)
(7) Electronic Control Module (ECM)
(8) Electric fuel transfer pump
(9) Crankshaft speed/timing sensor
(10) Engine oil pressure sensor
(11) Fuel temperature sensor
(12) Suction control valve for the fuel injection pump
Illustration 2 g06412188
Typical example of the close up views of sensor locations on the left side of the engine
(1) Fuel pressure sensor
(2) Water in fuel switch
(3) Inlet manifold temperature sensor
(4) Boost pressure sensor
(5) Electronic pressure relief valve
(6) NRS temperature sensor
(7) Electronic Control Module (ECM)
(8) Electric fuel transfer pump
(9) Crankshaft speed/timing sensor
(10) Engine oil pressure sensor
(11) Fuel temperature sensor
(12) Suction control valve for the fuel injection pump
Illustration 3 g06412198
Typical example of the sensor locations on the top of the engine
(13) NRS temperature sensor
(14) NRS differential pressure sensor
(15) NRS valve including a position sensor
Illustration 4 g06412226
Typical example of the sensor locations on the right side of the engine
(16) Exhaust Back Pressure Regulator (EBPR)
(17) Electronic Actuated Turbocharger Wastegate (EWG)
(18) Coolant temperature sensor
(19) Refrigerant compressor (if equipped)
(20) Camshaft speed/timing sensor
Illustration 5 g06412229
Typical example
(21) Wastegate regulator (engines with a single turbocharger)Sensor Locations for the Clean Emissions Module (CEM)
Illustration 6 g06370495
Typical example of the sensors and components on the Clean Emissions Module (CEM)
(1) Diesel Oxidation Catalyst (DOC) temperature probe
(2) Three probe temperature sensor
(3) Selective Catalytic Reduction (SCR) temperature probe
(4) Diesel Exhaust Fluid (DEF) injector
(5) ( 6) Soot sensor antenna
(7) Diesel Particulate Filter (DPF) temperature probeECM
Illustration 7 g06172947
Typical example
The Electronic Control Module (ECM) (1) functions as a governor and a computer for the fuel system. The ECM receives signals from the sensors to control the timing and the engine speed.The electronic system consists of the ECM, the engine sensors, and inputs from the parent machine. The ECM is the computer. The personality module is the software for the computer. The personality module contains the operating maps. The operating maps define the following characteristics of the engine:
Engine rating
Torque curves
High and low idle speed (rpm)
Emissions
Injection timingThe factory passwords restrict changes to authorized personnel. Factory passwords are required to clear any event code. Refer to Troubleshooting, "Factory Passwords" for more information on the passwords.The ECM has an excellent record of reliability. Any problems in the system are most likely to be the connectors and the wiring harness. The ECM should be the last item in troubleshooting the engine.The programmable software contains all the fuel setting information. The information determines the engine performance.Flash programming is the method of programming or updating the programmable software. Refer to Troubleshooting, "Flash Programming" for the instructions on the flash programming of the programmable software.The ECM is sealed and the ECM needs no routine adjustment or maintenance.Engine Speed
The electronic controls determine the injection timing, the amount of fuel that is delivered to the cylinders and the intake manifold pressure if an electronically controlled wastegate is installed. These decisions are based on the actual conditions and the desired conditions at any given time.The ECM has software that compares the desired engine speed to the actual engine speed. The actual engine speed is determined through the crankshaft speed/timing sensor and the camshaft speed/timing sensor. If the desired engine speed is greater than the actual engine speed, the ECM will instruct the electronic unit injector to inject more fuel to increase engine speed.