BASIC KNOWLEDGE REQUIRED (Cont'd.)
Diagnostic Data Reader: The hand held tool used for troubleshooting the DDEC system.
MPSI PRO-LINK 9000.
Engine Control Module: The controller of the DDEC IlI system. It reads the engine and
vehicle inputs, sensors and switches, calculates injector firing time and duration, and fires
injectors at appropriate times.
Electrically Erasable Programmable Read Only Memory
Pulsewidth Modulated: Modulated signal provided by the DDEC system.
Electronic Foot Pedal Assembly: Contains the Throttle Position Sensor.
Electronic Unit Injector
Fuel Pressure Sensor: Monitors Fuel Pressure.
Fuel Temperature Sensor: Monitors fuel temperature.
Idle Shutdown: Programmable feature of the DDEC III system.
Idle Validation Switch: A switch used to establish the idle speed position.
Limiting Speed Governor
Oil Level Sensor: Monitors oil level.
Oil Pressure Sensor: Monitors oil pressure.
Oil Temperature Sensor: Monitors oil temperature.
Pressure Governor Control: Regulates engine speed to maintain a selected external pump
Pressure Governor Control: Regulates engine speed to maintain a selected external
Resume/Accel Switch used for cruise control.
Stop Engine Light: Typically mounted on the instrument panel. It as two functions:
It is used as a warning to the operator that a potential engine damaging condition has been detected. If the
DDEC III system is programmed for shutdown, the engine will shut down on its own within 30 seconds. The
engine should not be run until the condition is corrected.
It is used by the operator or technician to "flash" out active trouble codes.
As a light bulb check and system check, the stop engine light will come on for about 5 seconds when the ignition
Is turned on.
Stop Engine Override: Allows the stop engine condition to be overridden In case it is
Set Coast Switch: Used in cruise control.
3-345.10 Change 3