Operating the Detroit Diesel Electronic Engine Commander (EEC)

Electronic Engine Commander (EEC)

Figure 1.1 - EEC Detroit Series 60 (DDEC IV)

There are two modes of operation for the Electronic Engine Commander. The RPM Mode controls the engine speed to a desired RPM and the Pressure Mode controls the engine speed to maintain a desired pump discharge pressure.
  • RPM Mode - for example on N2 Converter Pump Unit (as Figure 1-1), or Power Pack on Coiled Tubing Unit.
  • Pressure Mode - for example on Electronic Fire Commander (EFC) Pump Truck, will write on next post.

#RPM Mode:
The EEC must be powered ON and the Throttle Ready - Green LED (interlocks necessary for increased throttle operations are active) must be illuminated before any RPM adjustments can be made. The RPM LED will be ON to indicate that the EEC will operate in the RPM mode.
  • Engine speed can be controlled to a predetermined RPM by pressing the PRESET switch. (PROGRAMMABLE FROM THE EEC MENU).
  • Engine speed can be increased in 25 RPM increments using the INC switch.
  • Engine speed can be decreased in 25 RPM increments using the DEC switch.
  • Pressing the IDLE switch will return the engine RPM to it’s normal curb idle speed.

#Engine Parameters:
Engine RPM, Engine Oil Pressure, Engine Coolant Temperature (Eng Temp), and System Voltage (Volts) are displays continuously while the EEC is in operation. In addition to this, any operating parameter that would cause a Check Engine or Stop Engine Condition will be displayed on the EEC’s Information Center Message Display and an audible alarm will be activated.

#Programming the EEC:
  • To enter the programming menu, Press and hold the MODE and MENU switches at the same time until "Press Idle to Exit" is displayed on the information center, then release both switches.
  • Moving through the menu is accomplished by pressing the MENU switch.
  • Change to a selection is performed by using the INC and DEC switches.
  • Exiting the programming menu is done in one of two ways;
a). Pressing IDLE will exit the menu and save changes,
b). Pressing MODE will exit the menu without saving changes.

#Programming Menu Option:
→RPM Preset Point: (Preset Engine Speed) - Max. 1500 Rpm
→Pressure Set (PSI): (Preset PSI) - using on Pressure Mode
→Engine Hourmeter: (Information Only)
Figure 1.2 - Engine Hour Meter

→Pump Hourmeter: (Information Only)
→Engine Degrees: (Oil or Coolant)
→Pump Pressure (PSI): (Pressure Reading if Active)
→DDEC Software Ver: (ECU Revision Level)
Figure 1.3 - DDEC Software (42.01)

→EEC Software Ver: (EEC Revision Level)
Figure 1.4 - EEC Software (3.21)

→Engine Commander I/O Test: (Test Switches and Outputs)
Figure 1.5 - Commander to Test

→Press [MODE] Test Lights: (Tests Display Panel and Audible Alarm)
Figure 1.6 - MODE (Test Lights)

→Set Time Clock: (Set Clock)
Figure 1.7 - Set Time Clock

→Units of Measure: (English or Metric)
Figure 1.8 - Units of Measure

→Codes Currently Active: (Information Only) or Historical Codes (Displays YES or NONE)
Figure 1.9 - Historical Codes

→Connector Data: (Displays Connection Pinouts)
Figure 2.1 - Connector Data

→Welcome Message: (Enable or Disable)
Figure 2.2 - Welcome Message

→SAVE? [Idle=Y] [Mode=N] (Exit and Save Options)

→Use the MENU switch to scroll through the menu.
→Use the INC and DEC switches when the item you want to change is displayed.
→When changes are complete, press IDLE to exit and save changes.
→To exit the menu without saving changes, press MODE.


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