317 

 
No. 226 Oil alarm indicator is always on   

Malfunction Cause 

Solution 

Insufficient lubricating oil   

Check and eliminate oil leakage and fill lubricating oil 
according to specification   

Block of lubricating oil tube   

Dismantle oil pressure sensor and insert a flat bar to internal 
diaphragm of sensor. Open start-up switch, if oil pressure 
gauge actuates normally, thus the lubricating oil tube is 
blocked;  

Oil pressure sensor damaged 

Connect terminal of oil pressure sensor to bond strap with 
wire, if the oil alarm is normal, then oil pressure sensor is fault 
and may be replaced;   

Break or short-circuit of connecting 
wire for oil pressure alarm indicator 

Check the break or short-circuit of connecting wire for oil 
pressure alarm indicator with multi-meter and repair it;   

Over-low oil pressure   

Remove the fault according to diagnosis process in engine 
section;  

Oil pressure alarm 
indicator is always on or 
can’t alarm 

Internal fault of combined instrument  Replace combined instrument   

 
 

Oil alarm indicator is always on or 
can’t alarm 

Insufficient lubricating oil 

Block of lubricating oil tube 

Repair 

Oil pressure sensor damaged 

Replace 

Over-low oil pressure 

Break or short-circuit of connecting wire for oil 
pressure alarm indicator 

Check and repair

 

Short-circuit of combined 
instrument

Replace combined 
instrument

Fill lubricating oil 

Check and repair 

Normal 

Normal 

Normal 

Normal 

Normal 

Insufficient

Blocked

Blocked

Over-low 

Abnormal 

Abnormal 

 
 

 

 

318 

 
No. 227 Headlight is always on or not on   

Malfunction Cause 

Solution 

Broken fuse for headlights   

Check if fuse is broken and replace it if necessary;   

Burn-out of headlight   

Replaced burnt headlight   

Headlight relay is broken   

If fuse is intact, check if headlight relay is poor contact or 
burnt off and repair or replace it according to condition.   

Broken combined switch for headlight   

Check combined switch for headlight; measure 
conductivity of switch with multi-meter; if the resistances 
are both infinite when switch is placed on either lower 
beam or main beam position, thus the switch for headlight 
is broken and should be replaced;   

Broken harness or poor contact with 
bond strap   

Check circuits section by section to eliminate short-circuit 
or break;   

Burnt bulb or poor contact of lamp 
holder  

If fuse is normal, check if headlight lamp holder is poor 
contact or if filament is burnt out and repair or replace it 
according to condition.   

Internal fault of centralized controller 
(CK and MK)   

Replace centralized controller   

All headlights can’t work; 
all headlights is always on 
or not on 

Failure of light controller (Vision)   

Replace light control module;   

 

 

Broken bulb or poor contact of lamp socket 

Headlight is always on or not on 

Broken fuse for headlight 

Headlight relay is broken 

Broken switch for headlight 

Broken harness or poor contact with bond 
strap 

Repair or replace 

Replace   

Replace 

Replace 

Repair or replace 

Malfunction of centralized controller or 
light controller

Replace centralized controller or light 
controller

Normal 

Normal 

Normal 

Normal 

Normal 

Burnt out 

Burnt out 

Burnt out 

Abnormal 

Abnormal 

Abnormal 

 
 

 

 

319 

 

No. 228 Weak running of starter   

Malfunction Cause 

Solution 

 

Malfunction of battery   

Check if the voltage of battery reaches to 12.5 – 12.9V, if not, charge or replace the battery;   

Malfunction of harness   

Check the connecting end of starter harness for fine contact, if it's abnormal, the starter harness 
should be checked and repaired;   

Check if the internal bearing bush of starter is over-worn and thus results in fractional drag 
between rotator and stator and subsequent Weak running of starter; then bearing bush or starter 
assembly should be replaced;   

Measure length of internal brush of starter with vernier caliper; the standard length of brush 
should be 15.5 mm and the minimum worn length is 10 mm; if the brush is shorter than the 
minimum value, the brush or starter assembly should be replaced;   

Check if the no load current of starter is smaller than 90A under 11.5V; if it's abnormal, then 
starter assembly should be replaced;   

Check the grounding situation of starter commutator; check connection between armature coil 
and spindle with Ohm meter; it should be disconnected, if it’s connected, the commutator or 
starter should be replaced;   

Internal malfunction of 
starter  

Check if the undercutting depth of commutator should be 0.60 mm and the minimum depth 
should be 0.20 mm. if the depth is smaller than the minimum value, then the commutator or 
starter assembly should be replaced;   

Weak running of 
starter  

Malfunction of engine   

Check if the crankshaft of engine can be rotated or if it’s run heavily, if it’s abnormal to cause 
Weak running of starter, the engine should be checked and repaired internally;   

 

 

Weak running of starter 

Voltage of battery 

Does starter work normally? 

Malfunction of starter harness 

Engine works abnormally 

Charge or replace battery 

Check, repair or replace starter 

Repair or replace 

Repair or replace 

Normal 

Normal 

Normal 

Too low 

Abnormal 

Bad contact 

Abnormal 

 
 

 

 

320 

 

No. 229 Starter can’t work   

Malfunction Cause 

Solution 

Malfunction of 
battery  

Check if the voltage of battery reaches to 12.5 – 12.9V, if not, recharge or replace the 
battery;  

Malfunction of 
fuse  

Check the fuse of starting loop for break and replace fuse if it’s broken;   

Malfunction of 
starter relay   

Check if internal contacts of starter relay is conducting with power on, and replace the 
relay if it’s broken;   

Malfunction of 
harness  

Check the harness of starter for short-circuit or poor contact, if it's abnormal, the starter 
harness should be checked and repaired;   

Check if the coil of electromagnetic switch for starter is OK, and replace the 
electromagnetic switch if the coil is broken;   

Check the stator coil of starter for break or short-circuit, and replace starter assembly if 
the coil is abnormal;   

Measure length of internal brush of starter with vernier caliper; the standard length of 
brush should be 15.5 mm and the minimum worn length is 10 mm; if the brush is shorter 
than the minimum value, the brush or starter assembly should be replaced;   

Internal 
malfunction of 
starter  

Check the condition of commutator: 1. Check with Ohm meter if it’s connected between 
two commutators, and replace commutators or starter assembly if one of them is 
disconnected. 2. Check the grounding situation of starter commutator; check connection 
between armature coil and spindle with Ohm meter; it should be disconnected, if it’s 
connected, the commutator or starter should be replaced. 3. Check if the undercutting 
depth of commutator should be 0.60 mm and the minimum depth should be 0.20 mm. if 
the depth is smaller than the minimum value, then the commutator or starter assembly 
should be replaced. Check connecting condition of exciting coil: 1. Check with Ohm meter 
if it’s connected between conductor and exciting coil brush, and replace starter assembly 
if it’s disconnected. 2. Check the grounding condition of exciting coil; it should be 
disconnected between end of exciting coil and magnetic pole armature frame measured 
by Ohm meter, and replace starter assembly if it’s connected.   

 
Starter can’t work 

Internal 
malfunction of 
engine  

Check if the crankshaft of engine can be rotated normally, if it’s blocking or blocked, the 
engine should be checked and repaired.