Toe-In Curve Adjustment: Notes

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NOTE: An incorrectly adjusted toe-in curve adjustment causes the vehicle to pull to one side when braking or accelerating or when driving over bumps. Toe-in curve adjustment can also be referred to as toe constant "S" adjustment.

When the front wheels compress or rebound, the wheel's toe changes as a function of the compression and rebound travel. The resulting values are called toe-in curve.

The wheel alignment computer determines the toe constant "S" from a value measured in initial position and a value measured in raised position. In the process it compares actual values with specified values and displays them on the screen. Toe-in curve is adjusted when vehicle is in a raised position, by vertical adjustment of the tie-rod end.

Different adapters are needed for lifting, depending on suspension variation. To identify application of suspension and adapter, see Fig 1 . To identify adapter, see SPECIAL TOOLS . To prepare vehicle for checking toe-in curve adjustment, place vehicle in initial position by performing appropriate procedure.

Fig 1: Identifying Suspension Adapter To Adjust Toe-In Curve

Courtesy of AUDI OF AMERICA, INC.

NOTE: Before measuring toe-in constant, see PRELIMINARY CHECKS and WHEEL ALIGNMENT WORK SEQUENCE .