Holiday Rambler Imperial 2008, Руководство пользователя

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CHASSIS INFORMATION — 10
246
2008 IMPERIAL
TRANSMISSION
The Allison World transmission incorporates
the World Transmission Electronic Control
(WTEC) system. The system is compromised
of fi ve major components connected by a wiring
harness: the Electronic Control Unit (ECU),
engine throttle position sensor, three speed
sensors, remote shift selector (keypad) and the
control module. The ECU processes information
received from the engine, throttle position
sensor, speed sensor, pressure switch and shift
selector to provide optimum shift quality. This
is accomplished by matching transmission and
engine RPM during a shift to establish a desired
shift pro
fi le within the ECU. Another feature
of the transmission is the ability to “learn” or
“adapt.” The electronic control system optimizes
shift quality by using “Adaptive Shifting.”
A wide variety of varied shift conditions
is required before optimizing shift quality.
Generally,
fi ve typical shifts of a consistent shift
type are needed to optimize shift quality.
Shift Selector
The keypads on the shift
control are R (Reverse),
N (Neutral), D (Drive),
Up and Down arrow, and
Mode button. A digital
display window shows
gear selection, various
transmission modes, oil level
and transmission fault codes.
Generation 4 keypads have
a split screen displaying two
number sets while in drive.
The left number displays the highest forward
range available. The right number is the range
that the transmission is currently in.
NN
(Neutral) will appear in the display window
when the ignition is turned On. This indicates
the transmission is in neutral. If the
NN does
not display when the ignition is turned on,
there is no power to the shift selector and the
transmission will not allow the engine to start.
No display is an indicator of electrical problems
with the engine batteries, ECU or the shift
selector.
Keypad Functions:
Select the Reverse gear by pressing R .
RR will display.
Select Neutral by pressing
N . NN will
display. The area around the N button
has a raised ridge so the driver can
orient his hand to the push buttons by
touch without looking at the display.
Select Drive range by pressing
D . The
highest forward gear (6th gear) appears
in the display and the transmission will
shift to
fi rst gear indicated as 6 1.
The Up and Down arrow buttons are
used to select a higher (if not in “6”)
or lower (if not in “1”) forward range.
These buttons are not functional in
Neutral or Reverse.
When in Drive, one press changes the
gear range selected by one. If the button
is held continuously, the selected range
will continue to change up or down
until the button is released or until the
highest/lowest possible range of gears is
selected.
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The Mode button enables a secondary shift
schedule to be selected. This is commonly
referred to as Economy mode. Economy
mode affects the upshift schedule 3-4, 4-5,
5-6 and downshift schedule 6-5, 5-4, 4-3.
During highway driving, with the cruise
control set between 55 and 65 m.p.h.,
placing the transmission in economy mode
will eliminate about 99% of transmission
downshifts from sixth to
fi fth when
incurring a slight incline or overpass.
CAUTION:
DO NOT use Economy Mode in heavy
stop and go traffic or mountainous
terrains. Frequent shifting while using
heavy throttle occurs in Economy
Mode and increases transmission fluid
temperature. Exit Economy Mode until
road conditions improve.
NOTE:
Cruise control power switch enabled
alerts the shift schedule. Turn off the
cruise power switch in congested traffic
and mountainous terrain.
NOTE:
The Mode button is used by the service
technician to access diagnostic codes
when troubleshooting. The diagnostic
circuitry must be enabled to display.
CAUTION:
Engine temperature may rise when
ascending long grades using full
throttle. Towing a load will increase the
demand on the engine. If this occurs,
manually shift the transmission to the
next lower gear and use less throttle.
The engine will use less fuel and RPM
should increase.
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080355g