Controls and Instruments
48
NOTE
When the diagnostic display mode has been
entered, the MODE button is used to view and
toggle through diagnostic code information.
Refer to Technical Information chapter for
more details about diagnostic code display
procedure and fluid level check using the
pushbutton shift selector.
Functions of The “Mode” Button
Both ECONOMY (default mode at starting of the
engine) and PERFORMANCE (secondary shift
mode) modes are equivalent from the first to the
fourth gear as the transmission upshifts at
around 2000 rpm.
The ECONOMY mode allows for upshifts in fifth
and sixth gear at around 1700 rpm. This is a
more efficient operation of the transmission and
thereby helps improve fuel economy.
The PERFORMANCE mode keeps upshifts at
2000 rpm in fifth and sixth gears. This makes for
better performance than the economy mode but
with higher fuel consumption. It is recommended
this mode be selected while driving up or down
grades. The mode indicator (LED) is illuminating
when PERFORMANCE mode is selected.
DESCRIPTION OF AVAILABLE RANGES
R (Reverse)
Press the «R» button to select reverse. Com-
pletely stop the vehicle and let the engine return
to idle before shifting from forward range «D» to
reverse «R» or from reverse to forward range.
The reverse warning signal will be activated
when this range is selected.
N (Neutral)
Use this position to start engine. Select «N»
(Neutral) when checking vehicle accessories
and for extended periods of engine idle opera-
tion; parking brake must then be applied. The
pushbutton shifter will automatically select «N»
(Neutral) when the ignition switch is turned ON.
NOTE
The automatic transmission does not have a
park «P» position. Select «N» (Neutral) and
apply parking brake when the vehicle is left
unattended. An audible alert will sound if the
engine is stopped and the parking brake is not
applied.
DANGER
Always apply parking brake before leaving
driver's seat.
CAUTION
Detroit Diesel engines should not be idled for
extended periods at "slow" idle. For extended
idling, engine should run at "fast" idle.
CAUTION
Do not allow your vehicle to "coast" in neutral
«N». This practice can result in transmission
damage. Also, no engine braking is available
in neutral.
D (Drive)
Use this position for all normal driving condi-
tions. After touching this pad, the vehicle will
start in first or second range and will automati-
cally upshift to a higher range as output speed
increases. As the vehicle slows down, output
speed decreases, the transmission automati-
cally downshifts to the correct range. If a locked
brake or a slick surface condition should occur,
the TCM (Transmission Control Module) will
command converter operation (disconnect loc-
kup) and inhibit downshifts for a period of time or
until normal wheel speed has been restored.
IMPORTANT NOTE
Brake pedal must be applied when selecting
«D» (Drive) otherwise the transmission will
stay in «N» (Neutral).
NOTE
The transmission should normally be allowed
to shift by itself, but manual shifting can be
done as described below.
1 (First range)
Select this range when pulling through mud and
snow, when speed control is needed for driving
up or down steep grades or when maneuvering
in tight spaces. This range also provides maxi-
mum driving torque and engine braking power or
retarder braking effect. In the lower ranges (1,
2, 3 and 4), the transmission will not upshift
above the highest gear selected unless engine
overspeed is detected.
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