Volkswagen Touran Service Manual: Corrective Action When Vehicle Pulls to One Side

Volkswagen Touran Service Manual / Wheel and Tire Guide Information / Handling Problems / Vehicle Pulls to One Side / Corrective Action When Vehicle Pulls to One Side

Test Conditions Before and During the Road Test

Check all suspension components on front and rear axle for damage.

Check tire pressure and correct if necessary.

Check the tires for external damage. Holes, cuts, bulges in the side wall, flat spots from braking and/or damage to the tread.

Ask the customer if a tire had been damaged by a nail or similar object and perhaps repaired by a tire dealer. You may have to replace such tires.

Check tires for even wear and tread depth.

Are all tires of the same type, manufacture and tread pattern?

If the tires are non-directional, ensure that all DOT classifications on the tire face outwards. It may be that the vehicle's wheels and tires were already changed around at an earlier date.

Are the tire brands factory recommended as initial equipment?

For the road test, use a level, straight driving surface that does not slope off to one side and does not have ruts.

Perform the road test with the customer under the conditions specified above. The customer should demonstrate the problem.

Note

There should not be any side wind when road test takes place.

If the complaint is justified, it is recommend to rotate the wheels and tires as described on the following pages.

Before beginning, observe the following notes, otherwise all effort will be for nothing!

Note

Mark tires/wheels before the first rotation, e.g. LF, RF, LR, RR.

After rotating wheels or reversing the tire on its rim, observe very carefully how the vehicle behaves during the road test. Note what was replaced and how.

The intensity or any possible change to the one-sided pulling should be assessed.

To do this, it is absolutely essential that the road tests are always performed by the same person on the same road. It is best to drive the "test course" in both directions.

Replacing a tire with a new tire does not guarantee that pulling to one side will be eliminated. Therefore, it is recommended to perform a targeted exchange of the wheels as described below.

If there are large differences in the tread depth of the tires on the front and rear axles, the tires with the deeper tread should always be mounted on the front axle.

Targeted Rotating of Wheels for Non-Directional Tires

↓
Perform a road test to determine if a vehicle pulls to one side and if so, when and to which side
↓
If the vehicle pulls to one side, swap the front wheels.
↓
Road Test, Performing
Vehicle travels straight - END
Vehicle pulls opposite		Vehicle pulls to the same side
↓		↓
Reverse one tire on its rim on the front axle (reverse the direction of travel)		Rotate wheels from front to back
↓		↓
Road Test, Performing		Road Test, Performing
Vehicle travels straight - END		Vehicle travels straight - END
Vehicle does not travel straight		Vehicle does not travel straight
↓		↓
Swap front wheels and swap back wheels		Vehicle pulls opposite	No change
↓		↓	↓
Road Test, Performing		Reverse one tire on its rim on the front axle (reverse the direction of travel)	Check alignment of front and rear axles, adjust if necessary.
Vehicle travels straight - END			If adjustment is correct, inform Product Support.
Vehicle does not travel straight
↓
Swap the front wheels
↓		↓
Road Test, Performing		Road Test, Performing
Vehicle travels straight - END	Vehicle does not travel straight	Vehicle travels straight END
	↓	Vehicle does not travel straight
	Install new tires on front axle	Install new tires on front axle
	↓	↓
	Road Test, Performing	Road Test, Performing
	Vehicle travels straight - END	Vehicle travels straight - END
	↓	↓
Vehicle does not travel straight, inform Product Support

Wheels, Targeted Rotating for Directional Tires

↓
Perform a road test to determine if a vehicle pulls to one side and if so, when and to which side
↓
If the vehicle pulls to one side, swap wheel with tire front and back.
↓
Road Test, Performing
Vehicle travels straight - END
Vehicle does not travel straight
↓
First, replace one tire on the front axle
↓
Road Test, Performing
Vehicle travels straight - END
Vehicle does not travel straight
↓
Replace second tire on the front axle
↓
Road Test, Performing
Vehicle travels straight - END
Vehicle does not travel straight
↓
Measure vehicle at front and back
↓
Road Test, Performing
Vehicle travels straight - END
Vehicle does not travel straight, inform Product Support

Taper

Taper is caused by slightly offsetting the tread and/or the belt by a few tenths of a millimeter from the geometric center of the tire. Taper cannot be recognized vis ...

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