Tire condition diagnostics (Mitsubishi Colt 4)

Uneven and rapid wear

• Uneven and rapid tread wear can be caused by various reasons, such as: too low or too high air pressure in the tire, increased torque resistance to wheel rotation, frequent use of the brake system or incorrect wheel alignment angles. When adjusting wheel alignment angles based on rapid or uneven tire wear, it is necessary to set the minimum wheel alignment permissible according to the technical specifications
• It is recommended to rotate the wheels in the following cases: the wear of the front wheels differs from the rear ones; uneven wear of the tread in the transverse direction on any wheel; uneven wear of front wheels; uneven wear of rear wheels
• It is recommended to check the wheel alignment angles in the following cases: uneven wear of the front wheels; uneven wear of the tread in the transverse direction on any wheel; the front wheel tread has wear zones with one-sided sharp ridges along the tread or along the edges of the tread pattern blocks

Lateral vibrations of the body

• Lateral vibrations of the front and/or rear part of the body are caused by uneven positioning of the steel belt of radial tires relative to the plane of symmetry of the tire. Another reason may be increased axial runout of the wheel or tire
• Lateral vibrations are most pronounced at low vehicle speeds of 8 to 48 km/h. They can also impair the smoothness of the vehicle's ride at high speeds of 80 to 120 km/h
• The vehicle can be road tested to determine whether the tire causing the lateral vibrations is located at the front or rear. If the faulty tire is installed at the rear, the driver will feel occasional lateral jolts
• Lateral vibrations are more pronounced if the faulty tire is on one of the front wheels. In this case, longitudinal vibrations of the sheet metal body panels become noticeable and it seems to the driver that the vertical axis of the car's vibrations passes through his place
• In case of low intensity lateral vibrations, when it is not possible to determine the location of the faulty wheel, it is necessary to do the following: test drive the car to determine the location of the faulty wheel: front or rear; replace the car wheels with similar ones, but obviously serviceable (for example, dismantled from the same car), it is recommended to start by replacing the rear wheels test the car on the move. If there are no signs of a malfunction and the car's behavior has improved, you should first return one of the removed wheels to the car, and then the other. This will help to identify the faulty wheel. If lateral vibrations continue after replacing the rear wheels, you must also replace the front wheels with known serviceable ones. After this, you need to return one of the dismantled wheels to the car at a time and thus identify the faulty one

Car pulls to the side

• When pulling away, the car tends to shift in the lateral direction when driving on a flat, horizontal road (without a transverse slope of the road surface) and with a free steering wheel
• Car drift is usually caused by the following reasons: features of the tire design; uneven braking forces on the sides of the vehicle; wheel alignment angles violation
• Violation of manufacturing technology or some features of the tire design can cause the car to drift. For example, the displacement of the steel belt from the equatorial plane of a radial tire leads, even with rectilinear movement of the wheel, to the emergence of a transverse force that causes rolling with drift. The tire tends to move like a cone
• To determine the reason for the car being pulled away, diagnostics should be carried out in accordance with the recommended algorithm