337 

 
No. 242 Cooling fan can’t work   

Malfunction Cause 

Solution 

 

Malfunction of fan 
blades 

Check fan blades for distortion which may contact with fan guard and prevent fan from 
rotating; if it’s abnormal, thus fan blades should be replaced;   

Malfunction of fuse 
for cooling fan   

Check fuse of cooling fan for conducting; if it’s broken, the fuse of cooling fan should be 
replaced;  

Malfunction of relay 

Check #1 and #2 terminal of relay for conducting; if so, check #3 and #4 terminal of relay 
for conducting while applying positive voltage to #1 and #2 terminal; if not, the relay should 
be replaced;   

Malfunction of 
cooling 
temperature sensor 

Check if the resistance of coolant temperature sensor varies according to water 
temperature; check if the resistance of sensor is 2.5 kOhm +/- 5% under 20 degree; if it's 
abnormal, the temperature sensor for coolant should be replaced;   

Check internal coil of cooling fan motor for break or short-circuit; disconnect connectors of 
fan and connect battery and ammeter to the connectors; check if the current of cooling fan 
while running should be 5.7 – 7.7 A; if it’s abnormal, the motor assembly of cooling fan 
should be replaced;   

Malfunction of 
motor for cooling 
fan  

Check internal brush of cooling fan motor for worn-out; if it’s abnormal or over-worn, the 
motor assembly of fan should be replaced;   

Malfunction of 
harness  

Check the harness of cooling fan for short-circuit or break; if it's abnormal, the harness of 
cooling fan should be checked and repaired;   

Cooling fan 
can’t work 

Engine ECU   

Check engine ECU internally for fault; if so; detect and clear code with diagnostic 
equipment and then reset it; if it doesn’t work, then replace engine ECU;   

 

 

Cooling fan can’t work 

Fan blades blocked due to contacting with fan guard 

Broken fuse of fan 

Change fuse of fan 

Fan relay in poor operation

 

Replace fan relay 

Water temperature sensor in poor operation 

Short-circuit or open circuit of cooling fan motor 

Replace water 
temperature sensor 

Replace fan motor 

Open circuit of cooling fan motor loop 

Check and repair fan motor 
loop

Engine ECU 

Replace engine ECU 

Replace fan blades 

Abnormal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Break

Abnormal

Abnormal

Abnormal

Open circuit

Blocked

 
 

 

 

338 

 
No. 243 Weak running of cooling fan   

Malfunction Cause 

Solution 

Malfunction of battery   

Check if the voltage of battery reaches to 12.5 – 12.9V, if the over-low voltage 
results in weak running of fan, the battery should be charged or replaced ;   

Malfunction of cooling fan 
fuse  

Check fuse of cooling fan for good contact; if it’s broken, the cooling fan fuse 
should be replaced;   

Malfunction of cooling fan 
relay  

Check if fan relay is well power-on; or check if corrosion of pins will result in 
weak running of cooling fan; if it’s abnormal, the cooling fan relay should be 
replaced;  

Check if internal bearing bush of cooling fan is over-worn resulting in loosing or 
blocking of motor rotator and subsequent weak running; thus the motor 
assembly of cooling fan should be replaced;   

Check internal coil of cooling fan motor for break or short-circuit; disconnect 
connectors of fan and connect battery and ammeter to the connectors; check if 
the current of cooling fan while running should be 5.7 – 7.7 A; if it’s abnormal, 
the motor assembly of cooling fan should be replaced;   

Check internal brush of cooling fan motor for worn-out; if it’s  over-worn, the 
motor assembly of cooling fan should be replaced;   

Weak running of 
cooling fan   

Internal malfunction of motor 
for cooling fan   

Check if the fastening bolts for cooling fan blades are loosing or loose fitting; 
tighten or replace fan blades;   

 

 

Weak running of cooling fan 

Low voltage of battery 

Charge or replace battery 

Poor contact of fan fuse 

Replace fuse of fan 

Poor power-on of fan relay 

Replace fan relay 

Short-circuit of fan motor 

Replace fan motor 

Abnormal

Normal 

Normal 

Normal 

Abnormal

Abnormal

Over-low 

 
 

 

 

339 

 
No. 244 Wiper can’t work   

Malfunction Cause 

Solution 

Malfunction of fuse   

Check fuse of wiper for break or short-circuit; if it’s abnormal, the fuse should be 
replaced or the loop should be checked and repaired;   

Malfunction of wiper 
switch  

Check internal contacts of wiper switch for short-circuit or open circuit; if it’s 
abnormal, the wiper switch should be replaced;   

Malfunction of wiper 
motor  

Check internal coil of wiper motor for short-circuit; if it’s abnormal, the wiper motor 
assembly should be replaced;   

Malfunction of fuse for 
centralized controller 

Check fuse of centralized controller for conducting; if it’s broken or short-circuit, the 
fuse of centralized controller should be replaced;   

Internal malfunction of 
centralized controller   

Check centralized controller for normal working; if it’s abnormal, the centralized 
controller assembly should be replaced;   

Malfunction of harness 

Check wiper loop for break or short-circuit; if it’s abnormal, the loop should be 
checked and repaired;   

1. Check if there is dropping-off at connection of wiper link and wiper motor; if so, and 
the dropping-off results in malfunction of wiper, the link should be checked for 
damage; thus the wiper link should be replaced;   

Wiper can’t work 

Mechanical 
malfunction  

2. Check connection of wiper link for bad lubrication resulting in blocking and 
subsequent malfunction or continuous turning of wiper; thus the link should be 
greased or replaced;     

 

 

Wiper can’t work 

Broken fuse of wiper 

Change fuse

Short-circuit or break of internal 
contacts of wiper switch 

Replace wiper 
switch 

Short-circuit of internal coil of wiper 

Replace wiper motor 

Dropping-off of connection between wiper link and wiper motor 

Short-circuit or open circuit of wiper loop 

Check, repair or replace link 

Check and repair wiper 
loop 

Abnormal

Normal 

Normal 

Normal 

Normal 

Abnormal

Abnormal

Abnormal

Broken

 
 

 

 

340 

 

No. 245 Wipe doesn’t work at intermitting position   

Malfunction Cause 

Solution 

Malfunction of wiper switch   

Check if internal contacts of wiper switch are contacted well; if it’s 
short-circuit or poor contact, the wiper switch should be replaced;   

Malfunction of wiper relay   

Check intermitting relay of wiper for normal working; if it’s abnormal, then 
the intermitting relay of wiper should be replaced;   

Malfunction of fuse for centralized 
controller  

Check fuse of centralized controller for conducting; if it’s broken or 
short-circuit, the fuse of centralized controller should be replaced;   

Malfunction of wiper motor   

Check internal coil of wiper motor for short-circuit or break; if it’s broken, 
then check if the wiper works normally at other position; if it doesn't work 
too, the    motor assembly of wiper should be replaced;   

Malfunction of harness   

Check wiper harness for break or short-circuit; if it’s abnormal, the loop 
should be checked and repaired;   

Wipe doesn’t 
work at 
intermitting 
position  

Malfunction of  centralized 
controller  

Check centralized controller for normal working; if it’s abnormal, the 
centralized controller assembly should be replaced;   

 

 

Wipe doesn’t work at intermitting position 

Internal open circuit of wiper switch 

Replace wiper switch 

Short-circuit or open circuit of wiper motor coil 

Replace wiper motor 

Broken fuse of centralized controller 

Change fuse 

Open circuit of wiper loop 

Centralized controller in poor operation 

Repair the loop 

Replace centralized 
controller 

Abnormal

Normal 

Normal 

Normal 

Normal 

Abnormal

Abnormal

Open circuit

Broken