Geely Diagnosis Flow. Manual part — 78

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