237 

 

No. 173 Steering wander during normal driving   

Malfunction  

Causes 

Solution  

Tire pressure of two front wheels not equal, diameter not 
equal or ca loading uneven;   

Inflate the tire, adjust loading;   

One of tire or hub of two front wheels deformed   

Replace deformed tire or hub;   

One ball head of steering tie-rod loosening or jammed   

Replace loosening or jammed ball head; 

Toe-in too large or negative toe-in   

Correct toe-in; 

one ball head of lower swing arm loosening or jammed   

Replace loosening or jammed ball head 
of lower swing arm;   

Front spiral spring at two sides with unequal height or 
elasticity;  

Replace spring;   

One lower swing arm bent or lining loosening   

Replace lower swing arm assembly;   

Lower joist of front suspension deformed   

Replace lower joist of front suspension; 

Wheelbase of two sides of frames unqual 

Adjust wheelbase at two sides of frame; 

Hub bearing or oil seal of two front wheels with unequal 
degree of tightness 

Adjust degree of tightness of hub bearing 
or oil seal of two front wheels;   

Wheels at two sides of front, rear axles with braking or 
dragging at one side;   

Correct breaking of wheels at two sides 
of front, rear axle;   

camber angle of two front wheels, kingpin caster angle or 
kingpin toe-in angle unequal;   

Correct camber angle of two front 
wheels, kingpin caster angle or kingpin 
toe-in angle 

Front beam, rear axle tube or frame with bending with 
horizontal plane;   

Correct front beam, rear axle tube or 
frame;  

Camber of paving too large or with cross wind.   

Choose road for driving;   

Automatically run to 
another side during 
driving. Straight driving 
only ensured with 
hands forcibly    holding 
steering wheel 

Electric power-assisted steering pitch sensor incorrectly 
adjusted  

Adjust or replace steering column 
assembly;  

 

 
 

 

 

238 

 

Automatic steering wandering diagnosis flow chart 

 
 

 

 

239 

 

No. 174 Front wheel tire abnormally worn   

Malfunction Causes 

Solution 

(1) Tire pressure not conforming to requirements;

Inflate or discharge to the standard   

(2) Tire not changed for long time;   

Replace the tire   

(3) Front wheel incorrectly positioned, especially 
toe-in and camber incorrectly matched   

Make four-wheel positioning   

(4) Hub bearing loosening   

Replace the bearing 

(5) Steering inner, outer tie-rod or steering engine 
loosening;  

Replace ball head or fasten screws   

(6) Radial circle or end face circle of front wheel 
with too large runout;   

Balance the tire or replace tire   

(7) Rotating quality of front wheel imbalanced;   

Balance the tire 

(8) Front wheel yawing;   

Fasten nuts of tie-rod ball head, replace the tire   

(9) Longitudinal center line of front axle and frame 
not vertical, or wheelbase at two sides of frame 
unequal;  

Correct or adjust frame and wheelbase   

(10) Front axle or frame bent, deformed; 

Correct or adjust frame and wheelbase 

(11) Front axle with insufficient rigidity;   

Replace front axle   

(12) Steering tie-rod or ball joint with insufficient 
rigidity; 

Replace steering tie-rod   

(13) Front wheel unbracing, braking slowly back, 
or braking dragging;   

Adjust braking   

(14) Tire bolt loosening;   

Fasten screws   

(15) Overloading, uneven loading, startup too fast, 
turning or braking at high-speed with too strong 
rush;  

Reduce loading or reduce braking   

(16) Often drive on the road with larger camber;    Reduce driving on unfavorable road 

(17) Turning angle unable to ensure pure rolling of 
each wheel, with too much or insufficient steering; 

Eliminate incorrect driving behaviors   

Tire increasingly 
worn, with unusual 
tread shape 

(18) Poor tire quality;   

Choose high-quality tire   

 

 
 

 

 

240 

 

 

Diagnosis flowchart of unusual abrasion of front wheel