261 

11

 

Tire bead 
prized up   

Tire fabric and tire 
bead slip off; if 
severe, steel wire 
could be seen.   

Incorrect assembling: damage tire bead during 
assembling.  

Apply lubricating oil 
while assembling, 
and avoid barbaric 
behaviors  

12

 

Tire bead’s 
steel wire 
cracked, 
blown up   

Steel wire cracked in 
order, and those at 
cracks having its 
radius reduced.   

Use improper hub or tire seat. Rim is not effectively 
lubricated. When assembling, tire bead is not fully closed 
with rim. To complete assembling, charge too high 
pressure, causing high shear force locally at tire bead, 
making its steel wire broken in order, and tearing the tire 
sidewall, even causing severe accidents. 

Lubricate 
effectively, and 
avoid charging too 
high pressure and 
forced assembly   

13

 

Worn and 
damaged  

Tire casing deformed, 
tire cavity with high 
temperature 
scorching, and tire 
sidewall 
circumferentially  

While driving under insufficient pressure or pressure 
loss, causing contact surface of the tire too large, and 
unusual heating, and also causing reduced tire 
performance and rolling, till blown up; if severe, 
accidents may occur.   

Keep normal 
pressure  

 

 

With obvious rolling 
traces and 
scorification of cord 
thread; if severe, cord 
thread and tire casing 
rolled and cracked.   

 

 

14

 

Unusual 
abrasion 
(one side at 
shoulder) 

Pattern of one side of 
tire crown is 
circumferentially 
worn too quickly than 
other parts   

A. Toe-in too large or positive camber angle too large, 
and tire shoulder of outer side is worn. B. Toe-in too large 
or negative camber angle too large, and tire shoulder of 
inner side is worn. 

Correct toe-in or 
camber angle 

15

 

Unusual 
abrasion 
(local) 

Local pattern of tire 
crown is 
circumferentially 
worn more quickly 
than other parts 

When emergency braking or braking locking, tire is 
instantly abraded with road surface locally, causing local 
abrasion too quick.   

Avoid emergency 
braking  

16

 

Unusual 
abrasion  

Local pattern of tire 
crown is worn as in 
lumpy 

Caused by driving habit of mechanical system (caster 
angle too large, hub eccentric) 

Check mechanical 
system of the 
vehicle, and avoid 
rapid steering, 
braking, startup   

17

 

Unusual 
abrasion 
(two sides at 
shoulder) 

Pattern at two sides 
of tire crown is 
circumferentially 
worn too quickly than 
other parts 

Driving under relatively low pressure   

Check pressure 
and use standard 
pressure  

 

 
 

 

 

262 

No. 188 Causes analysis for common manufacturing defects of Geely 

automobile tire   

Serial 
No. 

Malfunctions  

Malfunction  

Causes  

1

 

Bracing ply 
separates  

Tire casing not stabbed, but cord thread loosens with 
tire casing.   

1. Steel wire of bracing ply not well bound 
with tire casing; ply separation may occur.   
2. While driving at high-speed for long time 
with low pressure, frictional force between 
tire and road surface increases, and tire 
crown unusually heats up, causing reduced 
adhesive force among parts, and ply 
separation may occur. 

2

 

Joint slips off   

Surface layer between tire sidewall rubber and 
rubber cracked   

Tire rubber and sidewall not well bound 
during manufacturing.   

3

 

Tire sidewall 
loosening  

Side bulged out; foreign substances inside while 
dissecting.  

Other substances mixed during 
manufacturing  

4

 

Inner loosening   

Cord plies bulged out, loosened with tire casing. 

1. Inner lining or cord plies and tire casing 
ply not well bound during manufacturing.   
2. While driving at high-speed for long time 
with low pressure, frictional force between 
tire and road surface increases, and tire 
crown unusually heats up, causing reduced 
adhesive force among parts, and ply 
separation may occur. 

 
 

 
 

 
 

 

 

263 

Electrics 

No. 189 CD-player disk boot malfunction (without MP3)   

Malfunction Cause 

Solution 

Power source malfunction 

Inspect +B and GND, which normal value shall be 10V to 14V. 
When ACC and GND ignition switch locating at ACC or ON, the 
voltage shall be 10V to 14V. If it indicates no powers supply, then 
check whether the fuse is burnt or not, and replace it if necessary. 
In common condition, GND and vehicle earth lead shall be 
conducted. 

CD inserted in wrong direction 

Check if the disk is inserted in wrong direction, and correct it if 
necessary.  

Wrong CD format or too dirty 
disk 

Firstly inspect the disk format, and change disk if necessary. Then 
check whether it contains dirt or scratch mark and replace it if 
necessary. 

CD not reset yet 

Press RESET button to reset CD-player 

Shock proof screw not 
removed   

Remove the shock proof screw on housing   

The laser head is too dusty and dirty, which affect reading ability of 
the lens. And it needs to be cleaned. Clean method: clean with 
special disk.   

The laser head of CD-player is 
too dirty or aged and too high 
resistance  

Laser head ageing, this results low laser power. That is, the beam 
from laser head can not focus correctly, which causes reading 
ability reduction or losing. Replace CD-player assembly. 

CD-player disk 
Boot malfunction 

Internal CD-player circuit 
malfunction  

Replace CD-player assembly.   

 

 
 

 

 

264 

 

CD-player disk boot failure (without MP3)

Using non-CD disk 

Dust on CD laser head 

Dirt on disk 

Power source malfunction 

CD-player not reset 

CD inserts in wrong direction     

Disk contains scrapes or deformation 

abnormal 

Shockproof screw not removed 

Internal CD-player malfunction 

Please use CD disk, rather than VCD, 

DVD or PC disk etc. 

Clean laser head 

Clean disk 

Inspect +B and GND, which normal value shall be 10V to 14V. 

When ACC and GND ignition switch locating at ACC or ON, the 

voltage shall be 10V to 14V. Inspect and replace the fuse. 

Press RESET button to reset CD-player

Correct the disk direction 

Replace disk 

Remove the shockproof screw on 

housing 

Replace CD-player assembly 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

Not removed 

Abnormal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal