Geely Diagnosis Flow. Manual part — 21

81

Cooling liquid temperature sensor
malfunction

Air filter blocked

Poor fuel quality

Clean

Replace

Replace

Tire obviously worn or pressure severely insufficient

Clutch slipping

Temperature control system malfunction
causing large oil consumption

Fuel pipe leaking

Braking seizing

Oil tank cover not well
sealed

Canister control non-return valve
damaged

Inlet pressure and temperature sensor damaged

Throttle valve position sensor with open
circuit

Repair or replace

Replace

Replace

Replace

Repair

Repair

Replace

Replace

Replace

Normal

Open circuit

Normal

Abnormal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Normal

Damaged

Not well sealed

Seizing

Leaking

Abnormal

Slipping

Unusual

Poor

blocked

Abnormal

82

Replace

Individual cylinders not
working

Incorrect valve timing of the engine

Cylinder pressure too low

Idling speed too large or too small

Water temperature abnormal l

Three-way catalyzer blocked

Repair

Repair

Repair

Repair

Repair

Normal

Abnormal

Normal

Normal

Normal

Normal

Abnormal

Too low

Incorrect

Not working

Blocked

83

No. 047 Intake tempering

Malfunction Causes

Solution

Improper ignition timing

Check ignition timing. When the engine is at idling speed, ignition advance angle
is 10°--12°; if not correct, adjust advance angle of initial ignition of the engine.
When accelerating, ignition advance angle could automatically be increased to
20°--30°. If unusual, check ignition control system or replace ECU;

Valve not well closed

Check valve clearance is normal; if not, adjust it; if the valve is burnt and
deformed and not well closed, replace the valve and re-furbish;

Oil injector blocked or with
poor atomization

Remove oil injector; check ejecting amounts and atomization are normal; if not,
clean or replace oil injector;

Inlet pressure sensor
malfunction

Check intake manifold pressure temperature sensor; if unusual, replace it;

Throttle valve position sensor
malfunction

Check throttle valve position sensor. When throttle valve is changed from fully
closed to fully opened, resistance of its signal terminal and earthing terminal shall
be increased continuously, without interruption; if unusual, adjust or replace it
accordingly;

Gas mixture too thin

Oil duct malfunction is caused by too low oil ejected, which is caused mainly as:
oil pressure is too low; oil injector blocked. Malfunction of intake system is
caused as intake amounts are too many, which is caused mainly as: sensor
controlling intake amounts are invalid; intake manifold leaking;

Engine valve timing error

Check valve timing is correct; if not, adjust it;

Intake
manifold with
tempering

Oil injection control program
malfunction within ECU

Replace engine’s Electronically Controlled Unit (ECU);

84

Check and adjust

Replace

Intake tempering

Improper ignition timing

Valve not well closed

Oil ejector blocked or with poor
atomization

Inlet pressure sensor malfunction

Throttle valve position sensor malfunction

Gas mixture too thin

Engine valve timing error

Repair

Replace

Clean

Repair

Malfunction of oil injection control
program within ECU

Replace

Repair

Normal

Abnormal

Normal

Normal

Normal

Normal

Normal

Normal

Improper

Not well closed

Poor atomization

Abnormal

Unusual

Too thin

Error