827675A 1 Mercury MOTOR ASSEMBLY

Illustration 1 g03734778
A typical example of a block diagram for the engine
(1) Valve for the NOx Reduction System (NRS)
(2) Air cleaner
(3) Air inlet temperature sensor
(4) Exhaust Cooler for the NOx Reduction System (NRS)
(5) Turbocharger
(6) Engine intake throttle valve
(7) Wastegate regulator
(8) Air-to-air aftercooler
(9) Engine exhaust gas pressure sensor
(10) Engine exhaust gas temperature sensor
(11) Crankshaft speed/timing sensor
(12) Camshaft speed/timing sensor
(13) Electronic unit injectors
(14) Fuel injection pump
(15) Fuel pressure sensor
(16) Oil pressure switch
(17) Coolant temperature sensor
(18) Engine
(19) Fuel transfer pump
(20) Primary fuel filter with water-in-fuel sensor
(21) Intake manifold air temperature/pressure sensor
(22) Secondary fuel filter with fuel temperature sensor
(23) Fuel tank
Illustration 2 g03734787
A typical example of a block diagram for the aftertreatment
(24) Diesel Exhaust Fluid (DEF) temperature sensor
(25) DEF level sensor
(26) DEF quality sensor
(27) Coolant diverter valve
(28) DEF tank header unit
(29) DEF tank
(30) DEF pump pressure sensor
(31) DEF pump filter
(32) DEF pump module
(33) DEF injector
(34) Engine out NOx sensor
(35) Diesel Oxidation Catalyst (DOC) inlet temperature sensor
(36) DOC
(37) DEF mixer
(38) Selective Catalytic Reduction (SCR) inlet temperature sensor
(39) SCR catalyst
(40) Ammonia Oxidizing (AMOX) catalyst
(41) SCR outlet temperature sensor
(42) Tailpipe out NOx sensor
(43) Ammonia sensor Note: The ECM is not mounted on the engine.The electronic control system has the following components:
ECM
Pressure sensors
Temperature sensors
Crankshaft speed/timing sensor
Camshaft speed/timing sensor
The suction control valve for the fuel injection pump
Wastegate solenoid
Electronic unit injectorsSensor 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 3 g03734793
Sensors and electrical connector locations on the left side of the engine
(1) Inlet metering valve for the fuel injection pump
(2) 10-pin engine interface connector
(3) 62-pin engine interface connector
(4) Fuel temperature sensor
(5) Fuel pressure sensor
(6) Oil pressure switch
(7) Crankshaft speed/timing sensor
(8) Water In Fuel (WIF) sensor
Illustration 4 g03734799
Close up view of sensors and electrical connector locations on the left side of the engine
(1) Inlet metering valve for the fuel injection pump
(2) 10-pin engine interface connector
(3) 62-pin engine interface connector
(4) Fuel temperature sensor
(5) Fuel pressure sensor
(6) Oil pressure switch
(7) Crankshaft speed/timing sensor
(8) Water In Fuel (WIF) sensor
Illustration 5 g03734801
Sensors and electrical connector locations on the right side of the engine
(9) Exhaust gas valve for the NOx Reduction System (NRS)
(10) Intake manifold air pressure and temperature sensor
(11) Exhaust temperature sensor connector
(12) Exhaust gas pressure sensor
(13) Intake throttle valve
(14) Coolant temperature sensor
(15) Wastegate regulator
(16) Secondary speed/timing sensor Sensor Locations for the Clean Emissions Module
Illustration 6 g03734805
Typical view of the sensor locations on the CEM
(17) Engine out NOx sensor
(18) Diesel Exhaust Fluid (DEF) injector
(19) Diesel Oxidation Catalyst (DOC)/DEF mixing chamber module
(20) DOC inlet temperature sensor ECM
Illustration 7 g02722357
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 in order 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 timingPasswords restrict changes to authorized personnel. Refer to Troubleshooting 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 n