differential RAM PROMASTER CITY 2022 Owners Manual

134SAFETY
Hill Start Assist (HSA)
HSA is designed to assist the driver when starting
a vehicle from a stop on a hill. HSA will maintain
the level of brake pressure the driver applied for a
short period of time after the driver takes their foot
off of the brake pedal. If the driver does not apply
the throttle during this short period of time, the
system will release brake pressure and the vehicle
will roll down the hill. The system will release brake
pressure in proportion to the amount of throttle
applied as the vehicle starts to move in the
intended direction of travel.
HSA ACTIVATION CRITERIA
The following criteria must be met in order for HSA
to activate:
The vehicle must be stopped.
The vehicle must be on a 5% (approximate)
grade or greater hill.
Gear selection matches vehicle uphill direction
(i.e., vehicle facing uphill is in forward gear;
vehicle backing uphill is in REVERSE gear).
HSA will work in REVERSE and all forward gears
when the activation criteria have been met. The
system will not activate if the vehicle is placed in
NEUTRAL or PARK.
Traction Control System (TCS)
TCS monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and
engine power is reduced to provide enhanced
acceleration and stability. A feature of the TCS
system, Brake Limited Differential (BLD) functions
similarly to a limited slip differential and controls
the wheel spin across a driven axle. If one wheel on
a driven axle is spinning faster than the other, the
system will apply the brake of the spinning wheel.
This will allow more engine torque to be applied to
the wheel that is not spinning. This feature remains
active even if TCS and ESC are in the “Partial Off”
mode Ú page 132.
Trailer Sway Control (TSC) — If Equipped
TSC uses sensors in the vehicle to recognize an
excessively swaying trailer and will take the
appropriate actions to attempt to stop the sway.
The system may reduce engine power and apply
the brake of the appropriate wheel(s) to counteract
the sway of the trailer.
NOTE:TSC cannot stop all trailers from swaying. Always
use caution when towing a trailer and follow the
trailer tongue weight recommendations
Úpage 68.
When TSC is functioning, the ESC Activation/
Malfunction Indicator Light will flash, the engine
power may be reduced and you may feel the
brakes being applied to individual wheels to
attempt to stop the trailer from swaying. TSC is
disabled when the ESC system is in the “Partial
Off” mode.
WARNING!
There may be situations on minor hills with a
loaded vehicle, or while pulling a trailer, when
the system will not activate and slight rolling may
occur. This could cause a collision with another
vehicle or object. Always remember the driver is
responsible for braking the vehicle.
WARNING!
If TSC activates while driving, slow the vehicle
down, stop at the nearest safe location, and
adjust the trailer load to eliminate trailer sway.

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