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surfaces. All vehicle wheels and tires must be the same
size and type and tires must be properly inflated to
produce accurate signals for the computer.
WARNING!
Significant over or under inflation of tires, or mixing
sizes of tires or wheels on the vehicle can lead to loss
of braking effectiveness.
The Anti-Lock Brake System conducts a low-speed self-
test at about 12 mph (20 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. The Anti-Lock
Brake System pump motor runs during the self-test at 12
mph (20 km/h) and during an ABS stop. The pump
motor makes a low humming noise during operation,
which is normal.
At the instant one of the wheels is about to lock up, a
slight pulsation can be felt in the brake pedal, indicating
that the ABS is in the regulating mode. Keep firm and
steady pressure on the brake pedal while experiencing
the pulsation. Continuous, steady brake pedal pressure
results in optimal braking power while maintaining the
ability to steer the vehicle. In the case of an emergency
brake maneuver, keep continuous full pressure on the
brake pedal. In this manner only can the ABS be most
effective. On slippery road surfaces, the ABS will respond
even with light brake pedal pressure because of the
increased likelihood of locking wheels. The pulsating
brake pedal can be an indication of hazardous road
conditions and functions as a reminder to take extra care
while driving.
292 STARTING AND OPERATING