Detroit Diesel MBE 4000 Service Manual page 14

MBE 4000 SERVICE MANUAL
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DDEC-VCU — Vehicle Control Unit
The vehicle control unit (DDEC-VCU) communicates with other electronic control units installed
on the vehicle over the J1587 datalink. See Figure 2. Within the DDEC-VCU, sets of data for
specific applications are stored. These include idle speed, maximum running speed, and speed
limitation.
Figure 2 Vehicle Control Unit (DDEC-VCU)
The DDEC-VCU receives data from the following sources:
The operator (accelerator pedal position, engine brake switch)
Other electronic control units (for example, the antilock brake system)
The DDEC-ECU control unit (data such as oil pressure and coolant temperature)
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6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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All information subject to change without notice.
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