Holiday Navigator 2003 Owner's Manual page 432

Chassis Information
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1 0 • 4 3 2
• The UPSHIFT and DOWNSHIFT arrow buttons are used to
select a higher (if not in "D") or lower (if not in "1") forward
range. These buttons are not functional in NEUTRAL or
REVERSE. 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 high-
est/lowest possible range of gears is selected.
• The MODE button enables a secondary shift point to be selected.
This is commonly referred to as "Economy." It is further used by
the service technician to access diagnostic codes when troubleshooting.
The diagnostic circuitry must be enabled to display.
• When the Auxiliary Braking device (Jacob or Exhaust brake) is
used, the display changes to a default reading of 2 or 3. This
default is pre-selected at the factory and can only be reprogrammed
by an authorized Allison Service Center. The transmission is not in
second or third gear. This is only a reference for the transmission
downshift points to optimize the engine braking effect.
• 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 down to the
next lower gear and use less throttle. The engine will use less fuel
and RPM should increase.
NOTE: The transmission will not accept a manually selected gear
change to occur if the gear selected is out of the specified operating
range.
NOTE: The transmission will not shift into gear if the engine RPM
is at or above 900. The display will flash "6" indicating the engine
RPM is excessive. Select "N" and lower the engine RPM.
N A V I G A T O R 2 0 0 3
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