Throttle will not Increase in RPM Mode (Detroit Diesel Electronic Engine Commander/EEC)
Electronic Engine Commander/ EEC
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| Figure 1.1 - Detroit Diesel EEC |
#Troubleshooting EEC
The Information Center displays DDEC ECM Diagnostic Codes and limited Engine information as well as PSG status, also be used as an aid in troubleshooting the Pressure Governor System and the Electronic Engine Commander/EEC.
Throttle will not Increase in RPM Mode
1). Check that the THROTTLE READY lamp is ON. The EEC will not respond in RPM Mode unless the OEM safety interlock requirements that enable the throttle are met (refer to Figure 1.1 above).
2). Press the PRESET and then the INC buttons.
Does the EEC indicate it is increasing RPM on the data display?
→Check the PRESET programmed into the EEC menu.
→In this case, PRESET button is OK (AUTO-INC to PRESET RPM: 1500), but INC button is not working.
3). Check the switch and outputs I/O test (Accessed in the Information Center menu). Read More: Accessing the Switch and Output I/O Test (Detroit Diesel Electronic Engine Commander/EEC).
→In this case, INC button is blank/ no data display at SWITCH/ OUTPUT test (NOT PASS).
→Another buttons (IDLE, PRESET, DEC, and MODE) are OK (PASS).
4). Re-initialize the EEC.
→Remove power to the EEC, wait ten seconds and then power the unit and try again. The EEC performs a "self-test" when it is powered up. This is indicated on the EEC by a momentary lighting of all the display segments).
5). Replace the EEC display.
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| Figure 1.2 - EEC display (INC button/ damage) |
→Remove allen key bolts on the EEC display (at Control Panel and behind the display).
→Remove the EEC display assembly (front display). |
| Figure 1.3 - EEC display (inside) |
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| Figure 1.4 - EEC display (new/ front display) |
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| Figure 1.5 - EEC display (new/ front display) |
→Check the switch and outputs I/O test, or directly press all the Governor Control switches (INC, DEC, IDLE, and PRESET buttons).
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| Figure 1.6 - INC button (INCREASE) |
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| Figure 1.7 - DEC button (DECREASE) |
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| Figure 1.8 - IDLE button (IDLE REQUEST) |
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| Figure 1.9 - PRESET button (AUTO-INC) |
→Install back allen key bolts on the new EEC display (at Control Panel).
→Accessing the Programming Menu Option on the new EEC display. Read More: Operating the Detroit Diesel Electronic Engine Commander (EEC). Need to check/re-settings the menu option, as below:
a). RPM Preset Point
b). Engine Degrees
c). Set Time Clock
d). Units of Measure
e). Welcome Message
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