Chrysler 2005 PT Cruiser Convertible - Manual (Page 198)

If either of the two hydraulic systems lose normal capa-
bility, the remaining system will still function with some
loss of overall braking effectiveness. This will be evident
by increased pedal travel during application and greater
pedal force required to slow or stop. In addition, if the
malfunction is caused by an internal leak, as the brake
fluid in the master cylinder drops, the brake warning
indicator will light.
Anti-Lock Brake System (ABS) — If Equipped
The ABS gives increased vehicle stability and brake
performance under most braking conditions. The system
automatically “pumps” the brakes during severe braking
conditions to prevent wheel lock up.
All vehicle wheels and tires must be the same size and
tires must be properly inflated to produce accurate
signals for the computer. However, the system will
compensate when the compact spare is in use.
During stops where ABS is activated, a vibration of the
brake pedal may be felt and associated system noises
may be heard.
NOTE: Pumping of the brake pedal will diminish the
effectiveness of Anti-lock brakes and may lead to an
accident. Pumping makes the stopping distance longer.
Just press firmly on your brake pedal when you need to
slow down or stop.
198 STARTING AND OPERATING