Section 9 --- Electrical Systems - Chassis
The Executive 2005
398
• The UPSHIFT and DOWNSHIFT arrow buttons are used to select a higher (if not in
sixth gear) or lower (if not in first gear) forward range. These buttons are not functional in
NEUTRAL or REVERSE. One press changes the gear selected by one range. If the up or
down button is held continuously, the range will continue to change up or down until the
button is released or until the highest/lowest possible gear is selected.
• The Mode button enables economy mode.
- To Enter Economy Mode: Press the MODE button. The LED will illumi-
nate.
- To Exit Economy Mode: Press the MODE button. The LED will extin-
guish.
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 miles per hour, setting the
transmission to economy mode will eliminate about 99% of transmission downshifts from sixth to fifth
when incurring a slight incline or overpass.
In city driving, with the transmission set to economy mode, the transmission will upshift approxi-
mately 200 RPM sooner using less fuel with reduced engine noise. Do Not use economy mode while
traveling in mountain terrain. The lower RPM shift schedule will reduce the flow of antifreeze, lubri-
cating oil and air flow through the radiator, resulting in increased transmission and engine temperature.
CAUTION:
Do not use the economy mode in heavy stop and go traffic or mountainous terrains.
Frequent shifting occurs when in economy mode while using heavy throttle, increasing
transmission fluid temperature. Exit economy mode until road conditions improve.
NOTE:
When the Auxiliary Braking device is used, the display will change to a default
reading of 2 or 3. This setting is pre-selected at the factory and can only be altered by
an authorized Allison Service center. The transmission is not actually in second or
third gear. This is only a reference point so the transmission will optimize engine
braking efficiency.
Parking Brake
The parking brake system is activated when the push-pull control knob (located
on the driver’s left console panel) is pulled. When the knob is pushed, the brake is
released. Prior to driving, allow time for the air compressor to build up sufficient
air to shut off the air warning lamp.
WARNING:
There is a possibility the parking brake can be accidentally released
if the air system is charged. It is advised to fabricate a device to be placed
under the parking brake handle preventing small children and pets
from releasing the brake when parked. A wooden clothespin clasped to
the shaft will be suitable.
park brake.eps
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