Ddec Iv Electronic Control Module (Ecm); Water Heater - PREVOST H3-41 Manual

OTHER FEATURES
available to provide a package that will meet the
user's specific needs.
Smart Card technology is available for partial
data extraction from the Data Logger by adding
a Smart Card Interface module to the Data Hub
system. Current limitations in card memory
capacity will restrict the user to gathering only
selected data with the card. The credit card-
sized device has been recently introduced for
fuel purchase authorization and driver
communication on a nationwide basis with a
network of 1,500 truck stops equipped with
Smart Card interfaces.
Several long range communication systems are
currently available that are routinely used by
trucking companies for driver communication
and vehicle location. These systems rely on
various technologies (e.g., cellular, radio,
satellite). The Data Logger may be interfaced
with these existing systems for partial data
extraction. Complete extraction is not
recommended due to the cost of the
communication time.
The use of Data Hub is described in the
instruction manual furnished with each tool.
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 a 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.
Data Logger
A Data Logger may be added to the system to
expand the recording capability available from
the ECM. A range of memory capacities is
planned with up to a maximum of 640K possible.
This will allow expansion of daily recording to
several months. Additional features are also
available when a Data Logger is included in the
system.
The Data Logger adds an Event Log, which
details the date and time of various trip events
(e.g., trip legs and stops, speeding and idling
events, diagnostic messages). Detailed alert
recording documents 13 engine parameter
values for 1 minute prior to the occurrence of
selected diagnostic messages to aid in
troubleshooting. This is especially useful for
diagnosing intermittent conditions. Detailed
incident recording stores speed, RPM, brake,
cruise and throttle status at 1 second intervals
for a continuous 3 minute period for use in
incident reconstruction.
The Data Logger receives its data via the SAE
J1708 data link. This provides the ability to
monitor and record data provided by any J1708
compatible device, such as a non-DDEC ECM,
an electronic transmission, anti-lock brakes
(ABS) or smart sensors. A battery-backed
clock/calendar is also included to provide
accurate reference points for recorded data.
The current date and time may also be
requested via J1708 for use by other devices.
The Data Logger has enhanced interface
capability, which allows it to operate the Driver
Data Display and provides compatibility with a
variety of data extraction options. There is also
a digital output channel that may be used to
drive an audible or visual signaling device. It is
designed for installation in a moisture-protected
environment.

WATER HEATER

A choice of optional water heaters include the
Webasto DBW 2010 rated at 45 000 Btu/h (13
kW), the DBW 2020 rated at 80 000 Btu/h (23.3
kW) and the Espar D12W, rated at 41 000 Btu/h
(12 kW).
The auxiliary preheating system is used for
preheating and retaining the heat of water-
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