RAM 2015 1500, Operating Information Manual, Page: 323 / 998

BRAKE SYSTEM
If power assist is lost for any reason (for ex-
ample, repeated brake applications with the
engine off), the brakes will still function. How-
ever, you will experience a substantial increase
in braking effort to stop the vehicle.
If either the front or rear hydraulic system loses
normal braking capability, the remaining system
will still function with some loss of overall brak-
ing effectiveness. This will be evident by in-
creased pedal travel during application, greater
pedal force required to slow or stop, and acti-
vation of the “Brake Warning Light” and the
“ABS Warning Light” (if equipped) during brake
use.
Hydraulic Brake Assist — 2500/3500
Models Only (Except Power Wagon)
The brake system power assist is provided by a
hydro-boost unit which shares fluid with the
power steering system. You may experience
some clicking or hissing noises from the hydro-
boost system during hard braking conditions.
NOTE:
Under cold temperatures, pedal effort will be
higher than normal until the power steering
fluid reaches operating temperature.
ELECTRONIC BRAKE
CONTROL SYSTEM
Your vehicle is equipped with an advanced
electronic brake control system that includes
Anti-Lock Brake System (ABS), Traction Con-
trol System (TCS), Brake Assist System (BAS),
Electronic Roll Mitigation (ERM), Hill Start As-
sist (HSA), Electronic Stability Control (ESC),
Trailer Sway Control (TSC) and Hill Decent
Control (HDC [Power Wagon only]). All of the
systems work together to enhance vehicle sta-
bility and control in various driving conditions,
and are commonly referred to as ESC.
Anti-Lock Brake System (ABS)
The Four-Wheel Anti-Lock Brake System (ABS)
is designed to aid the driver in maintaining
vehicle control under adverse braking condi-
tions. The system operates with a separate
computer to modulate hydraulic pressure to
prevent wheel lockup and help avoid skidding
on slippery surfaces.
The system’s pump motor runs during an ABS
stop to provide regulated hydraulic pressure.
The pump motor makes a low humming noise
during operation. This is normal.
The ABS conducts a low-speed selftest at about
10 mph (16 km/h). If you have your foot lightly
on the brake while this test is occurring, you
may feel slight pedal movement. The movement
can be more apparent on ice and snow. This is
normal.
When you are in a severe braking condition
involving use of the ABS, you will experience
some pedal drop as the vehicle comes to a
complete stop. This is the result of the system
reverting to the base brake system and is
normal.
Engagement of the ABS may be accompanied
by a pulsing sensation. You may also hear a
clicking noise. These occurrences are normal,
and indicate that the system is functioning.
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