Nissan 2011 Altima Coupe User Manual download pdf (Page 333)

Normal operation

The ABS operates at speeds above3-6MPH(5

- 10 km/h). The speed varies according to road

conditions.

When the ABS senses that 1 or more wheels are

close to locking up, the actuator rapidly applies

and releases hydraulic pressure. This action is

similar to pumping the brakes very quickly. You

may feel a pulsation in the brake pedal and hear a

noise from under the hood or feel a vibration from

the actuator when it is operating. This is normal

and indicates that the ABS is operating properly.

However, the pulsation may indicate that road

conditions are hazardous and extra care is re-

quired while driving.

The Vehicle Dynamic Control (VDC) system uses

various sensors to monitor driver inputs and ve-

hicle motion. Under certain driving conditions,

the VDC System helps to perform the following

functions:

● Controls brake pressure to reduce wheel

slip on one slipping drive wheel so power is

transferred to a non slipping drive wheel on

the same axle.

● Controls brake pressure and engine output

to reduce drive wheel slip based on vehicle

speed (traction control function).

● Controls brake pressure at individual wheels

and engine output to help the driver maintain

control of the vehicle in the following condi-

tions:

– understeer (vehicle tends to not follow

the steered path despite increased steer-

ing input)

– oversteer (vehicle tends to spin due to

certain road or driving conditions)

The VDC system can help the driver to maintain

control of the vehicle, but it cannot prevent loss of

vehicle control in all driving situations.

When the VDC system operates, the

indi-

cator in the instrument panel flashes so note the

following:

● The road may be slippery or the system may

determine some action is required to help

keep the vehicle on the steered path.

● You may feel a pulsation in the brake pedal

and hear a noise or vibration from under the

hood. This is normal and indicates that the

VDC system is working properly.

● Adjust your speed and driving to the road

conditions.

See “Slip indicator light” and ”Vehicle Dynamic

Control (VDC) off indicator light” in the ”Instru-

ments and controls” section.

If a malfunction occurs in the system, the

and indicator lights come on in the instru-

ment panel. The VDC system automatically turns

off when these indicator lights are on.

The VDC OFF switch is used to turn off the VDC

system. The

indicator illuminates to indi-

cate the VDC system is off.

VEHICLE DYNAMIC CONTROL (VDC)

SYSTEM

5-26 Starting and driving

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Nissan 2011 Altima Coupe User Manual Page 333

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