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Air Conditioning And Heater
Air Conditioning And Heater Operation
To turn on the air conditioning, set the fan control at any
speed and press the SNOWFLAKE button located at the
right of the control panel. Conditioned air will be di-
rected through the outlets selected by the mode control.A light at the top of the SNOWFLAKE button shows that
the air conditioning is on. Press the button a second time
to turn the air conditioning off.
Slight changes in engine speed or power may be noticed
when the air conditioning compressor is on. This is a
normal occurrence as the compressor will cycle on and
off to maintain comfort and increase fuel economy.
The Mode Control (at the right of the
control panel) can be set in any of the
following positions:
NOTE:To improve your selection choices, the system
allows you to operate at intermediate positions between
the major modes. These intermediate positions are iden-
tified by the small dots.
Air Conditioning and Heater Control
Mode Control
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As the temperature gets colder it may be necessary to
direct air onto the windshield by using MIX Mode
position on the control. Adjust the temperature control
and blower speed to maintain comfort. High blower
speeds will reduce fogging. Interior fogging on the
windshield can be quickly removed by selecting the
defrost mode.
Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates on the inside of windows can increase the
rate of window fogging.
Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer, to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50%concentration of engine coolant to distilled water is
recommended. Refer to ªCooling Systemº under ªMain-
tenance Proceduresº in Section 7.
When using the air conditioner in extremely heavy
traffic, in hot weather, especially when towing a trailer,
additional engine cooling may be required. If this situa-
tion is encountered, operate the transmission in a lower
gear and set the air conditioner to recirculation mode.
Operating the air conditioner in recirculation mode pro-
vides the maximum performance from your air condi-
tioning. When stopped in heavy traffic, it may be neces-
sary to shift into NEUTRAL and depress the accelerator
slightly for fast idle operation.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other obstruc-
tions. This will help prevent snow going into the ducts.
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Shifting
Fully depress the clutch pedal before shifting gears. As
you release the clutch pedal, lightly depress the accelera-
tor pedal.
You should always use 1st gear when starting from a
standing position.
Recommended Vehicle Shift Speeds
To utilize your manual transmission efficiently for both
fuel economy and performance, it should be upshifted as
listed in recommended shift speed chart. Shift at the
vehicle speeds listed for acceleration. When heavily
loaded or pulling a trailer these recommended up-shift
speeds may not apply.
Manual Transmission Shift Speeds in MPH (KM/H)
En-
gineAxleAccel-
eration
Rate1to2 2to3 3to4 4to5 5to6
3.7L3.21
&
3.55ACCEL
&
CRUISE15
(24)
10
(16)24
(39)
19
(31)34
(55)
27
(44)47
(76)
37
(60)56
(90)
41
(66)
Shift Pattern
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If the transmission temperature gets extremely hot, the
transmission will automatically select the most desirable
gear for operation at this temperature. If the transmission
temperature becomes hot enough, the ªTrans Tempº light
may illuminate and the transmission may downshift out
of Overdrive until the transmission cools down. After
cooldown, the transmission will resume normal
operation.
The transmission will downshift from Overdrive to
DRIVE if the accelerator pedal is fully depressed at
vehicle speeds above approximately 35 mph (56 km/h).When to Use TOW/HAUL Mode
When driving in hilly areas, towing a trailer, carrying a
heavy load, etc., and frequent transmission shifting oc-
curs, press the TOW/HAUL switch. This will improve
performance and reduce the potential for transmission
overheating or failure due to excessive shifting. When
TOW/HAUL Switch
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operating in TOW/HAUL mode, 5th gear (if equipped) is
disabled and 2-3 and 3-4 shift patterns are modified.
Shifts into Overdrive (4th gear) are allowed during
steady cruise (for improved fuel economy), and auto-
matic closed-throttle downshifts to 3rd gear (for im-
proved braking) will occur during steady braking.
The TOW/HAUL light will illuminate in the instrument
cluster to indicate when the switch has been activated.
Pressing the switch a second time restores normal opera-
tion. If the TOW/HAUL mode is desired, the switch must
be pressed each time the engine is started.
Torque Converter Clutch
A feature designed to improve fuel economy is included
in all automatic transmissions. A clutch, within the
torque converter, engages automatically at a calibrated
speed at light throttle. It engages at higher speeds under
heavier acceleration. This may result in a slightly differ-
ent feeling or response during normal operation in highgear. When the vehicle speed drops below a calibrated
speed, or during acceleration, the clutch automatically
and smoothly disengages. The feature is operational in
Overdrive and in Drive.
NOTE:The torque converter clutch will not engage
until the transmission fluid and engine coolant are warm
(usually after 1-3 miles [1.6 - 4.8 km] of driving). Because
the engine speed is higher when the torque converter
clutch is not engaged, it may seem as if the transmission
is not shifting into Overdrive when cold. This is normal.
Pressing the TOW/HAUL switch, when the transmission
is sufficiently warm, will demonstrate that the transmis-
sion is able to shift into, and out of, Overdrive.
NOTE:If the vehicle has not been driven in several
days, the first few seconds of operation after shifting the
transmission into gear may seem sluggish. This is due to
the fluid partially draining from the torque converter into
the transmission. This condition is normal and will not
250 STARTING AND OPERATING
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Transfer Case Position Indicator Lights
Transfer case position indicator lights are located on the
instrument cluster. If there is no indicator light on or
flashing, the transfer case position is in two-wheel drive
(2WD). If the indicator light is on, the desired position
(4WD LOCK and 4WD LOW) has been obtained.
If One or More Shift Requirements are not Met:
1. An indicator light will flash.
2. The transfer casewill notshift.
NOTE:Before retrying a selection, make certain that all
the necessary requirements for selecting a new transfer
case position have been met. To retry the selection, turn
the control knob back to the current position, wait five
seconds, and retry selection. To find the shift require-
ments, refer to the9Shifting Procedure9in this section.
The ªSVC 4WDº warning light monitors the electric shift
4WD system. If this light remains on after engine start-upor illuminates during driving, it means that the 4WD
system is not functioning properly and that service is
required.
WARNING!
Always engage the parking brake when powering
down the vehicle if the(SVC 4WD(light is illumi-
nated. Not engaging the parking brake may allow the
vehicle to roll, which may cause personal injury.
NOTE:Do not attempt to make a shift while only the
front or rear wheels are spinning. The NV233/243 trans-
fer case is not equipped with a synchronizer and there-
fore the front and rear driveshaft speeds must be equal
for the shift to take place. Shifting while only the front or
rear wheels are spinning can cause damage to the trans-
fer case.
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Shifting Procedure - NV233/243 Transfer Case
NOTE:If any of the requirements to select a new
transfer case position have not been met, the transfer case
will not shift, the indicator light for the previous position
will remain ON, and the newly-selected position indica-
tor light will continue to flash until all the requirements
for the selected position have been met. To retry a shift:return the control knob back to the original position,
make certain all shift requirements have been met, wait
five seconds, and try the shift again.
2WD-to-4WD LOCK or 4WD LOCK-to-2WD
Rotate the 4WD Control Switch to the desired position.
Shifts between 2WD and 4WD LOCK can be done with
the vehicle stopped, or in motion. With the vehicle in
motion, the transfer case will engage / disengage faster if
you momentarily release the accelerator pedal after turn-
ing the control switch. If the vehicle is stopped, the
ignition key must be in the ON position with the engine
either RUNNING or OFF. This shift cannot be completed
if the key is in the ACC position.
NOTE:On vehicles equipped with Anti-Lock Brake
Systems, the 4x4 system will not allow shifts between
2WD/ 4WD LOCK if the rear wheels are spinning (no
traction). In this situation the selected position indicator
light will flash and the original position indicator light
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will remain ON. At this time, reduce speed and stop
spinning the wheels to complete the shift. There may be
a delay up to 10 seconds for the shift to complete after the
wheels have stopped spinning.
4WD LOCK-to-4WD LOW or 4WD LOW-to-4WD
LOCK
NOTE:When shifting into or out of 4WD LOW, some
gear noise may be heard. This noise is normal and is not
detrimental to the vehicle or occupants.
Shifting can be performed with the vehicle rolling 2 to
3 mph (3 to 5 km/h), or completely stopped. USE
EITHER OF THE FOLLOWING PROCEDURES:
Preferred Procedure
1. With engine RUNNING, slow vehicle to 2 to 3 mph (3
to 5 km/h).2. Shift the transmission into NEUTRAL (depress clutch
on manual transmissions).
3. While still rolling, rotate the transfer case control
switch to the desired position.
4. After the desired position indicator light is ON (not
flashing), shift transmission back into gear (release clutch
on manual transmissions).
Alternate Procedure
1. Bring the vehicle to complete stop.
2. With the key ON and the engine either OFF or
RUNNING, shift the transmission into NEUTRAL (de-
press clutch on manual transmissions).
3. Rotate the transfer case control switch to the desired
position.
256 STARTING AND OPERATING