Vehicle Dynamic Control (VDC) system

Vehicle Dynamic Control (VDC) system  - Starting and driving - Infiniti QX Owners Manual - Infiniti QX

The Vehicle Dynamic Control (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 VDC warning light panel 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. If a malfunction occurs in the system, the VDC warning light the illuminates in the instrument panel. The VDC system automatically turns off. The VDC OFF switch is used to turn off the VDC system. The VDC off indicatorilluminates to indicate the VDC system is illuminates to indicate the VDC system is off. When the VDC switch is used to turn off the system, the VDC system still operates to prevent one drive wheel from slipping by transferring power to a non slipping drive wheel. The VDC warning light flashes if flashes if this occurs. All other VDC functions are off, and the VDC warning light flash. The VDC system is automatically 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. When the 4L position is selected with the 4WD shift switch, the VDC system is disabled and the VDC off indicator light illuminates (for 4WD models). See Vehicle Dynamic Control (VDC) warning light in the 2. Instruments and controls section and Vehicle Dynamic Control (VDC) off indicator light in the 2. Instruments and controls section. 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.

► The VDC system is designed to help WARNING

► The VDC system is designed to help improve driving 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 vehicles suspension. If suspension parts such as shock absorbers, struts, springs, stabilizer bars, bushings and wheels are not INFINITI recommended for your vehicle or are extremely deteriorated, the VDC system may not operate properly. This could adversely affect vehicle handling performance, and the VDC warning light ► If brake related parts such as brake may illuminate.
► If brake related parts such as brake pads, rotors and calipers are not INFINITI recommended or are extremely deteriorated, the VDC system may not operate properly and the VDC warning light may illuminate. may illuminate.
► If engine control related parts are not INFINITI recommended or are extremely deteriorated, the VDC warning light may illuminate. may illuminate.
► When driving on extremely inclined surfaces such as higher banked corners, the VDC system may not operate properly and the VDC warning light illuminate. Do not drive on these types may illuminate. Do not drive on these types of roads.
► When driving on an unstable surface such as a turntable, ferry, elevator or ramp, the VDC warning light illuminate. This is not a malfunction. may illuminate. This is not a malfunction. Restart the engine after driving onto a stable surface.
► If wheels or tires other than the INFINITI recommended ones are used, the VDC system may not operate properly and the VDC warning light illuminate. may illuminate.
► The VDC system is not a substitute for winter tires or tire chains on a snow covered road.

Vehicle Dynamic Control (VDC) OFF switch

The vehicle should be driven with the

The vehicle should be driven with the Vehicle Dynamic Control (VDC) system ON for most driving conditions. When the vehicle is stuck in mud or snow, the VDC system reduces the engine output to reduce wheel spin. The engine speed will be reduced even if the accelerator is depressed to the floor. If maximum engine power is needed to free a stuck vehicle, turn the VDC system off. To turn off the Vehicle Dynamic Control (VDC) system, push the VDC OFF switch.

The VDC off indicator light will will illuminate. Push the VDC OFF switch again or restart the engine to turn ON the system.

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