RAM 1500 2021 - Active-Level Four Corner Air; Suspension System - if Equipped; Description

150 STARTING AND OPERATING
during driving, it means that the four-wheel drive
system is not functioning properly and that service
is required.
NOTE:
Do not attempt to make a shift while only the front
or re
ar wheels are spinning. This could cause
damage to driveline components.
When operating your vehicle in 4WD LOW, the
engi
ne speed is approximately three times that of
the 2WD, 4WD AUTO or 4WD HIGH positions at a
given road speed. Take care not to overspeed the
engine and do not exceed 25
mph (40 km/h).
Proper operation of four-wheel drive vehicles
depe
nds on tires of equal size, type and
circumference on each wheel. Any difference in
tire size can cause damage to the drivetrain.
Because four-wheel drive provides improved
trac
tion, there is a tendency to exceed safe turning
and stopping speeds. Do not go faster than road
conditions permit.
Shifting Procedure
 If any of the requirements to select a new
transfer case position have not been met, then
the transfer case will not shift. The position indi
-
cator light for the previous position will remain
on an
d the newly selected position indicator
light will continue to flash until all the require
-
ments for the selected position have been met.
 If all the requirements to select a new transfer
case position have been met, then the current
position indicator light will turn off and the
selected position indicator light will flash until
the transfer case completes the shift. When the
shift is complete, the position indicator light for
the selected position will stop flashing and
remain on.
ACTIVE-LEVEL FOUR CORNER AIR
SUSPENSION SYSTEM — IF EQUIPPED
DESCRIPTION
The air suspension system provides full time load
leveling capability along with the benefit of being
able to adjust vehicle height by using the toggle
switch.
Air Suspension Switch
 Normal Ride Height (NRH) – This is the standard
position of the suspension and is meant for
normal driving.
 Off-Road 1 (OR1) (Raises the vehicle approxi-
mately 1 inch (26 mm)) – This position should
be
the primary position for all off-road driving
until Off-Road 2 (OR2) is needed. A smoother
and more comfortable ride will result. To enter
OR1, push the height selector switch up once
from the NRH position while the vehicle speed is
WARNING!
Always engage the parking brake when powering
down the vehicle if the SERV 4WD Warning Light
is illuminated. Not engaging the parking brake
may allow the vehicle to roll which may cause
personal injury or death.
1 — Off-Road 2 Indicator (Customer Selectable)
2 — Off-Road 1 Indicator (Customer Selectable)
3 — Normal Ride Height Indicator
(Customer Selectable)
4 — Aero Mode Indicator (Customer Selectable)
5 — Entry/Exit Mode Indicator
(Customer Selectable)