This document is printed from SPI². Not for RESALE
Sensor Locations for the Clean Emissions Module
Illustration 30 g02738216
Typical view of the sensor locations
(18) Diesel Oxidation Catalyst (DOC) inlet
temperature sensor
(19) Diesel Particulate Filter (DPF) inlet
temperature sensor
(20) Inlet connection for the DPF differential
pressure sensor
(21) Outlet connection for the DPF
differential pressure sensor
ECM
Illustration 31 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 timing
Passwords 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.
34 UENR0623
Engine Operation
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