TM 5-2410-240-23-1
0004
ENGINE SYSTEMS CONTINUED
Table 1. Engine ECM Inputs and Outputs.
0004
KEY
COMPONENT
DESCRIPTION
1
Electronic Unit Injector (EUI)
An electro-mechanical device that injects high-pressure fuel
into the cylinders as a fine spray. Refer to Fuel System in this
work package.
2
Solenoid for Fuel Injection Pump
Controls a valve in the fuel injection pump, which controls
pressure in the fuel manifold (rail). Refer to Fuel System in this
work package.
3
Wastegate Solenoid
Regulates boost pressure to the wastegate actuator. Refer to
Turbocharger in this work package.
4
Secondary Speed/Timing Sensor
Provides actual engine speed data to the engine ECM when
the engine is cranking. Refer to Secondary Speed/Timing
Sensor in this work package.
5
Fuel Injection Pump
Increases and regulates fuel pressure and delivers high-
pressure fuel to the fuel manifold (Rail) for injection into the
cylinders. Refer to Fuel System in this work package.
6
Primary Speed/Timing Sensor
Provides actual engine speed data to the engine ECM when
the engine is running. Refer to Secondary Speed/Timing
Sensor in this work package.
Provides data to the engine ECM for determining fuel injection
7
Inlet Manifold (Boost) Pressure
Sensor
timing and air/fuel ratio. Refer to Pressure Sensors in this work
package.
8
Fuel Manifold Pressure Sensor
Monitors fuel pressure in the fuel manifold (rail). Refer to Fuel
System in this work package.
9
Engine Oil Pressure Sensor
Provides data about engine oil pressure to the engine ECM.
This data allows the engine ECM to determine if engine
damaging conditions exist. Refer to Pressure Sensors in this
work package.
10
Inlet Manifold Temperature Sensor
Provides data to the engine ECM for determining fuel delivery,
fuel injection timing, and cooling fan operation. Also used for
engine monitoring. Refer to Temperature Sensors in this work
package.
11
Coolant Temperature Sensor
Provides data to the engine ECM for determining fuel delivery,
fuel injection timing, and cooling fan operation. Also used for
engine monitoring. Refer to Temperature Sensors in this work
package.
12
Diagnostic Connector
A port used to connect diagnostic tools to machine and engine
electronic control systems. The diagnostic connector is
located in the fuse and circuit breaker panel.
13
Engine ECM
The engine ECM controls engine operating parameters and
functions as a governor and a computer for the fuel system as
described throughout this work package. The engine ECM
communicates with the machine ECM by means of the
Controller Area Network (CAN) bus.
