349 

 
No. 253 Window lifter can’t work   

Malfunction Cause 

Solution 

 

Fuse burnt 

Check if fuse of lifter burnt; if so, check if the circuit connects to earth wire and results 
in fuse burning because of over-current; replace fuse after repairing.   

Circuit 

Check all connectors of circuit for poor contact, short-circuit or open circuit;   

Check switch of lifter for loosing or poor contact; if so, repair it.   

 
Switch of lifter   

Check if the voltage of power supply for switch of lifter is 12V and there is power 
output after pressing switch; if not, replace the switch of lifter.   

Dismantle internal decorating plate of door; Check motor of window lifter for normal 
working after power-on; if it’s abnormal, replace it;   

Check if the resistance of glass along the sliding groove is too big and if the sliding 
groove is distorted; if it’s abnormal, it should be checked and repaired;   

Motor of lifter   

Check motor of lifter and measure the resistance between terminals of motor with 
Ohm meter; if the resistance is infinite, the lifter should be replaced;   

Check fuse and relay of centralized controller harness; if they are abnormal; replace 
them;  

Check if connector of centralized controller is firm; if it's abnormal, it should be 
checked and repaired;   

Window lifter 
can’t work 

Centralized controller   

Check centralized controller for normal working with displacement method, otherwise 
replace it if necessary;   

 

 

Checking, repairing or 
replacing 

Malfunction of fuse 

Window lifter can’t work 

Malfunction of circuit 

Check and repair 

Malfunction of lifter switch 

Check, repair or replace 

Malfunction of lifter motor 

Check, repair or replace 

Malfunction of centralized controller 

Check, repair or replace 

Normal 

Abnormal 

Normal 

Normal 

Normal 

Abnormal 

Abnormal 

Abnormal 

Abnormal 

 
 

 

 

350 

 
No. 254 Blocking Door lock   

Malfunction Cause 

Solution 

Rusty Door lock   

Rusty internal mechanism of Door lock can't be moved. Clear, lubricate or 
replace it on rusty condition.   

Check if the lockup unit is firm and free of dropping-of; if not, it should be repaired; 

Check the lockup unit for blocking; it should be moved freely during normal working; 
if it’s blocked, the lockup unit should be replaced;   

Malfunction of opener 
of Door lock   

Check motor of lockup unit and measure its resistance for short-circuit or break; if 
so, it should be replaced;   

Door  

Check if the door is distorted and if there is sign of squeezing or bumping; if it’s 
abnormal, the door should be calibrated;   

Over-abrading Door 
lock  

Check if the blocking of internal mechanism of Door lock is because of 
over-abrading; if so, it should be replaced;   
 

Check Door lock for loosing; if so, adjust or replace it.   

Dislocation of Door 
lock due to external 
force  

Check Door lock for distortion; if so, replace it.   

Door can’t be 
opened due to 
blocking latch   

Supporting bar for 
knob of Door lock 

Dismantle internal decorating plate of door and check supporting bar for knob of 
Door lock for blocking or distortion; if it's abnormal, it should be calibrated or 
replaced.  

 

 

Blocking door latch 

Blocking or rusting of door latch 

Malfunction of door opener 

Distortion or dislocation of door 

Over-abrading door latch 

Blocking or interference of door latch knob 

Check, repair or 
replace

Check, repair or 
replace

Replacing 

Check, repair or 
replace

Checking and 
repairing

Normal 

Blocking or 
interference 

Normal 

Normal 

Normal 

Rusting or 
blocking 

Abnormal 

Distortion or 
dislocation 

Worn-out

 
 

 

 

351 

 
No. 255 Failure of door lock   

Malfunction Cause 

Solution 

 

1. Check if internal knob is too tight and unable to return; if 
so, it should be adjusted or replaced;   

1. Internal knob of door is blocked and unable 
to return   

2. Check if internal knob of door is unable to return 
because of distortion or dislocation; if so, it should be 
adjusted or replaced;   

2. Blocking of core of door lock   

3. Check if core of door lock is unable to return because of 
rusting or over-abrading, so that the Door lock can’t be 
sprung back; if so, clear or replace it;   

3. Broken body of door lock   

4. Check internal structure of Door lock body for damage; if 
so, it should be replaced;   

4. Distortion of door   

5. Check door for distortion due to external bumping;   
If so, it should be adjusted or replaced;   

Door can’t be 
closed because of 
failure of door lock   

5. Distorted or blocking knob of door lock   

6. Check operating knob of door lock for distortion or 
interference; otherwise it should be repaired or replaced; 

 

Failure of door lock 

Blocking of internal knob of door 

Blocking or damage of core of door lock 

Broken body of door lock 

Distortion of door 

Distortion of door lock knob 

Repair or replace 

Replace 

Replace 

Check, repair or replace 

Replace 

No 

No 

No 

No 

Yes 

Yes 

Yes 

Yes 

Yes 

 
 

 

 

352 

 
No. 256 If four doors of vehicle are not closed, the anti-theft alarm will be activated automatically and 
central control will be locked automatically   

Malfunction Cause 

Solution 

 

Is triggering switch of door control 
broken?  

Check if the triggering switch of door control is unable to return 
or blocked; repair or replace it according to condition;   

Is centralized controller broken?    

Check if there is signal outputted from centralized controller; 
repair or replace it according to condition;   

If four doors of vehicle 
are not closed, the 
anti-theft alarm will be 
activated automatically 
and central control will 
be locked 
automatically  

 
Malfunction of circuit    

Check loops among all doors for break, short-circuit or poor 
contact, otherwise repair them;    

 

 

If four doors of vehicle are not closed, the anti-theft alarm will be activated automatically and 
central control will be locked automatically 

Blocking or non-return of door control 
switch

Centralized controller is broken 

Poor contact, short-circuit or open circuit 

Replace 

Replace 

Check and 
repair 

No 

Yes 

No 

Yes 

Yes