309 

 
No. 220 Incorrect indication (or no indication) of fuel gauge   

Malfunction Cause 

Solution 

1) Malfunction of power supply 
circuit for instrument   

1) Open fuse unit and check if CLUSTER(10A) AM1(30A) and 
MAIN(80A) in fuse unit is broken; replace if necessary;   
2) Place igniting switch to ON and measure voltage of instrument 
connector B4 with voltage grade of multi-meter; the voltage should be 
equal to the voltage of battery (standard voltage: 12V); measure 
resistance  of instrument connectors B7 and B8 to bond strap; the 
resistance should be zero because B7 and B8 are bond straps of 
instrument; if power supply voltage for B4 and resistances for B7 and 
B8 are different from normal values, circuit should be checked and 
repaired or fuse should be replaced;   

2) Malfunction of stabilizing circuit 
for fuel gauge   

3) Dismantle instrument panel and then switch on igniting switch; 
check output voltage between “+12V” and “-“ terminals of instrument 
stabilizer for normal 11.5 – 12.5 V; if the voltage is lower than 11.5 V 
or higher than 12.5 V or no voltage output, the stabilizer should be 
replaced;  

3) Fuel gauge in poor operation 

4) Check fuel gauge condition: disconnect sensor of fuel gauge and 
open igniting switch; using external resistor instead of resistor of 
sensor for detection and identification, the fuel gauge will indicate out 
of fuel with 110Ω resistor, one-fourth tank of fuel with 75Ω resistor, 
half tank of fuel with 40Ω resistor, three-fourth tank of fuel with 20Ω 
resistor and full of fuel with 3Ω resistor; if the results indicated by fuel 
gauge are different from above values, fuel gauge or instrument 
assembly should be replaced;   

 
4) Short-circuit or break of 
connecting wire between fuel 
gauge sensor and combined 
instrument  

5) Disconnect fuel sensor and combined instrument; measure 
resistance of connecting wire between fuel gauge sensor and 
combined instrument with multi-meter and the standard is 0 Ohm; the 
resistance between the wire and bond strap should be infinite as 
break status; otherwise the wire is short-circuit or broken and should 
be replaced;   

 
5) Floater of fuel sensor is blocked 

6) Floater of fuel sensor is blocked: check if there has been crash on 
bottom of tank and if there is bulge or other object which prevents 
floater from moving upward and downward, so that the fuel gauge is 
incorrect; if yes, clear, repair or replace it;   

Incorrect indication 
(or no indication) of 
fuel gauge   

6) Fuel gauge sensor in poor 
operation 

7) Check fuel gauge sensor with resistance grade of multi-meter: the 
resistance measured by multi-meter should be 3±2Ω when floater of 
sensor is at full position, and 32.5±3Ω for middle (1/2 position) of tank, 
110±6Ω for out of fuel position; if measured results for floater of 
sensor are different from standard values, fuel gauge sensor should 
be replaced;   

 
 

 

 

310 

Check if fuel gauge sensor is 
blocked 

Check bottom of tank for distortion and 
internal surface of tank for bulge or 
other blocking 

Check fuel stabilizing circuit; 
dismantle instrument panel and 
then switch on igniting switch; 
check output voltage between 
“+12V” and “-“ terminals of 
instrument stabilizer 

Replace fuse 

Replace fuel gauge 
sensor 

Replace 
stabilizer 

Replace fuel gauge or 
instrument assembly 

Disconnect sensor of fuel gauge and open igniting switch; use 
external resistor instead of resistor of sensor to detect and 
view if fuel gauge actuate 

Check if there is short-circuit or break of 
connecting wire between fuel gauge 
sensor and combined instrument 

Replace fuel gauge or 
instrument assembly 

Incorrect indication (or no indication) of 
fuel gauge 

Check if pointer position of fuel gauge is 
met with external resistors 

Check, repair or replace 

Check power supply loop for instrument; open fuse 
unit and check fuse for burn-out; measure voltage 
of B4 instrument connector for normal voltage of 
battery 

Clear or replace 

Abnormal 

Abnormal 

Yes 

No 

No 

Yes 

Yes 

No 

 
 

 

 

311 

No. 221 No indication of water temperature gauge   

Malfunction Cause 

Solution 

Water temperature gauge in poor operation 

 Check water temperature gauge condition: disconnect 
sensor of water temperature gauge and open igniting switch; 
using external resistor instead of resistor of sensor for 
detection and identification, the water temperature gauge will 
indicate around “C” area with 165Ω resistor, around “1/2 C” 
area with 56Ω resistor, around “H” area with 28.7Ω resistor; if 
the results indicated by water temperature gauge are 
different from above values, water temperature gauge or 
instrument assembly should be replaced; 

Place igniting switch to ON and measure voltage of 
instrument connector B4 with voltage grade of multi-meter; 
the voltage should be equal to the voltage of battery 
(standard voltage: 12V); measure resistance  of instrument 
connectors B7 and B8 to bond strap; the resistance should 
be zero because B7 and B8 are bond straps of instrument; if 
power supply voltage for B4 and resistances for B7 and B8 
are different from normal values, circuit should be checked 
and repaired or fuse should be replaced;   

Malfunction of power supply circuit for 
instrument  

Dismantle instrument panel and then switch on igniting 
switch; check output voltage between “+12V” and 
“-“ terminals of instrument stabilizer for normal 11.5 – 12.5 V; 
if the voltage is lower than 11.5 V or higher than 12.5 V or no 
voltage output, the stabilizer should be replaced;   

Water temperature gauge sensor in poor 
operation 

5) While checking water temperature sensor, the sensor can 
be dismantled from engine and put into coolant or water with 
certain temperature, in the meantime, check if the resistance 
value is met with standard value. When temperature of 
coolant is 60 , the resistance of water temperature sensor 

℃

is 164.5±5Ω; and when temperature of coolant is 90 ,

℃

 the 

resistance of water temperature sensor is 56±3Ω; when 
temperature of coolant is 115 , the resistance of water 

℃

temperature sensor is 28.7±2Ω; if measured resistance 
values of water temperature sensor are different from 
standard values, water temperature sensor should be 
replaced;  

No indication of 
water temperature 
gauge  

Short-circuit or open-circuit of connecting 
wire between water temperature gauge 
sensor and combined instrument   

4) Disconnect water temperature sensor and combined 
instrument; measure resistance of connecting wire between 
water temperature gauge sensor and combined instrument 
with multi-meter and the standard is 0 Ohm; the resistance 
between the wire and bond strap should be infinite as break 
status; otherwise the wire is short-circuit or broken and 
should be replaced;   

 
 

 

 

312 

Replace water 
temperature sensor 

Disconnect sensor of water temperature gauge and open igniting 
switch; use external resistor instead of resistor of sensor to detect 
and view if water temperature gauge actuate

No indication of water 
temperature gauge 

Check power supply loop for instrument; open fuse unit 
and check fuse for burn-out; measure voltage of B4 
instrument connector for normal voltage of battery 

Replace water temperature 
gauge or instrument assembly 

Replace 
stabilizer 

Check, repair or 
replace

Check if there is short-circuit or break 
of connecting wire between water 
temperature gauge sensor and 
combined instrument

Check connecting wire of 
water temperature sensor 
or replace instrument 
assembly 

Replace 
fuse 

Check if pointer position of water 
temperature gauge is met with 
external resistors 

Check water temperature sensor with multi-meter 
to measure resistances in different temperatures 

Replace water temperature gauge or 
instrument assembly 

Check water temperature gauge stabilizing circuit; dismantle 
instrument panel and then switch on igniting switch; check output 
voltage between “+12V” and “-“ terminals of instrument stabilizer 

Yes 

No 

Yes 

No 

Normal 

Abnormal

Abnormal

Abnormal

Abnormal