OTHER FEATURES
SHEMATIC DIAGRAM OF DDEC IV SYSTEM
OEH3B402
DDEC IV ELECTRONIC CONTROL
MODULE (ECM)
The simplest implementation of Data Hub does
not require the addition of any hardware to the
vehicle. Instead, basic Data Hub features built
into the DDEC IV ECM are used. The ECM
stores data such as miles, fuel used, idle time,
PTO time, idle fuel, cruise time and cruise fuel
on life-to-date, trip and daily basis. Daily
recording is limited to a maximum of two days.
Selected parameters, such as oil pressure, are
measured periodically under specified
conditions. The measurements are analyzed
over long time periods, which allows the system
to detect degradation in performance and warn
the user prior to component failure.
The average life span of up to ten components
may be specified in terms of miles, fuel used,
time, engine RPM and engine hours. The ECM
tracks the specified factors and automatically
alerts the user when the average life span of the
component has been attained. An event log is
also stored which indicates the vehicle status
(e.g., off, idle, in motion) at 15 minute intervals.
Data stored in the DDEC IV ECM is extracted by
connecting a cable from a PC to the vehicle's
diagnostic connector via an RP1202 adapter
module. Data extraction takes about 20
seconds.
MESSAGE CENTER DISPLAY (MCD)
MCD is a standard dashboard mounted graphic
device that displays and records operational data
transmitted by the Detroit Diesel Electronic
Controls (DDEC) and other electronically
controlled components on the SAE J1708/1587
diagnostic data link.
The many functions of the MCD include vehicle
operating status for the driver and diagnostics for
the technician.
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