Nissan Altima (L34) 2019-2025 Owners Manual: Vehicle Dynamic Control (VDC) system

The VDC system uses various sensors to monitor driver inputs and vehicle 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 conditions:
  • Understeer (vehicle tends to not follow the steered path despite increased steering 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 indicator light in the instrument panel flashes to 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.

For additional information, see "Slip indicator light" and "Vehicle Dynamic Control (VDC) OFF indicator light".

If a malfunction occurs in the system, the indicator light comes on in the instrument panel. The VDC system automatically turns off when the indicator light is on.

The vehicle information display is used to turn off the VDC system. When the VDC system is turned off, the indicator light and if so equipped, the RAB system warning light, AEB system warning light and AEB with Pedestrian Detection system warning light illuminate to indicate the

VDC, AEB, AEB with Pedestrian Detection, and RAB systems are off.

When the VDC system is turned off in the vehicle information display, the VDC system still operates to prevent one drive wheel from slipping by transferring power to a non-slipping drive wheel. The indicator light flashes if this occurs. All other VDC functions are off and the indicator light will not flash.

The VDC system is automatically reset to ON when the ignition switch is placed in the OFF position then back to the ON position.

The computer has a built-in diagnostic feature that tests the system each time you start the engine and move the vehicle forward or in reverse at a slow speed. When the self-test occurs, you may hear a clunk noise and/or feel a pulsation in the brake pedal. This is normal and is not an indication of a malfunction.

WARNING

• The VDC system is designed to help the driver maintain stability but does not prevent accidents due to abrupt steering operation at high speeds or by careless or dangerous driving techniques. Reduce vehicle speed and be especially careful when driving and cornering on slippery surfaces and always drive carefully.
• Do not modify the vehicle's suspension.

  If suspension parts such as shock absorbers, struts, springs, stabilizer bars, bushings and wheels are not NISSAN recommended for your vehicle or are extremely deteriorated, the VDC system may not operate properly. This could adversely affect vehicle handling performance, and theindicator light may flash or theindicator light may illuminate.

• If brake related parts such as brake pads, rotors and calipers are not NISSAN recommended or are extremely deteriorated, the VDC system may not operate properly and both theandindicator lights may illuminate.
• If engine control related parts are not NISSAN recommended or are extremely deteriorated, both the and theindicator lights may illuminate.
• When driving on extremely inclined surfaces such as higher banked corners, the VDC system may not operate properly and theindicator light may flash or theindicator light may illuminate. Do not drive on these types of roads.
• When driving on an unstable surface such as a turntable, ferry, elevator or ramp, theindicator light may flash or theindicator light may illuminate. This is not a malfunction.

  Restart the engine after driving onto a stable surface.

• If wheels or tires other than the NISSAN recommended ones are used, the VDC system may not operate properly and theindicator light may flash or theindicator light may illuminate.
• The VDC system is not a substitute for winter tires or tire chains on a snow covered road.

Brake force distribution

During braking while driving through turns, the system optimizes the distribution of force to each of the front and rear wheels depending on the radius of the turn.

WARNING

• The VDC system is designed to help the driver maintain stability but does not prevent accidents due to abrupt steering operation at high speeds or by careless or dangerous driving techniques. Reduce vehicle speed and be especially careful when driving and cornering on slippery surfaces and always drive carefully.
• Do not modify the vehicle's suspension.

  If suspension parts such as shock absorbers, struts, springs, stabilizer bars, bushings and wheels are not NISSAN recommended for your vehicle or are extremely deteriorated, the VDC system may not operate properly. This could adversely affect vehicle handling performance, and theindicator light may flash or theindicator light may illuminate.

• If brake related parts such as brake pads, rotors and calipers are not NISSAN recommended or are extremely deteriorated, the VDC system may not operate properly and both theand indicator light may illuminate.
• If engine control related parts are not NISSAN recommended or are extremely deteriorated, both the and theindicator light may illuminate.
• When driving on extremely inclined surfaces such as higher banked corners, the VDC system may not operate properly and theindicator light may flash or theindicator light may illuminate. Do not drive on these types of roads.
• When driving on an unstable surface such as a turntable, ferry, elevator or ramp, theindicator light may flash or theindicator light may illuminate. This is not a malfunction.

  Restart the engine after driving onto a stable surface.

• If wheels or tires other than the NISSAN recommended ones are used, the VDC system may not operate properly and theindicator light may flash or theindicator light may illuminate.
• The VDC system is not a substitute for winter tires or tire chains on a snow covered road.