Geely Diagnosis Flow. Manual part - 12
45
No. 027 Engine fails to start
Malfunction Cause
Solution
No fuel
Check fuel gauge and fuel level
Check battery voltage, whether it is normal, which shall above 11.5V. Charge or
replace battery when the value is too low. Check or replace circuit, if battery fails to
be charged as normal (check whether there is short circuit in inner/outer circuit,
which results current leaking). Check battery circuit and all connections, whether
they are well conducted.
Low battery voltage
Check starter, whether it operates normally. Maintain or replace it when necessary.
Starter malfunction
Check starter, whether it operates normally. Check starter circuit, solenoid switch,
carbon brush, coil and rotor, whether there is short or open circuit, as well as poor
conduction. Check one-way clutch whether it is slipping, as well as one-way clutch
and fly wheel tooth, whether they are damaged. Maintain or replace them when
necessary.
Ignition switch open
circuit and wire
malfunction
Check circuit, fuse, ignition switch by multimeter, set to resistance range, whether
they are open circuit. To inspection the malfunction.
Electric control system
malfunction
Connect Geely special No. to check whether there is malfunction No.. And inspect
again if it shows malfunction No.. Then check relevant component and circuit
according to the indication of malfunction No..
Check high voltage spark, if it operates normally, then check engine speed sensor,
ignition coil, ECU and relating circuit. Maintain or replace them when necessary.
(Connect two pins of primary winding respectively to multimeter, and the
resistance shall be 0.4~0.6Ω at 20 . In same condition, the resistance of
℃
secondary winding shall be 11~15kΩ. Connect pin 2 and pin 3 of sensor to
multimeter pen respectively, and at 20 the rated resistance shall be 860Ω±10%)
℃
Check ignition timing, if it is improper, then check flywheel signal plate, whether it is
loose and malposition. Maintain or replace it when necessary.
Improper ignition
timing or weak spark
voltage
Check high voltage spark energy, if it is weak, then check ignition coil, high voltage
resistance. Replace it when necessary.
Spark plug malfunction
Check spark plug electrode clearance and carbon deposit condition. Adjust or
replace it when abnormal.
Check timing belt, whether there is damage. Replace it when necessary.
Incorrect valve timing
Check timing belt, whether there is damage. Replace it when necessary.
Air filter blocked or
intake system leaking
Check air filter, whether it is blocked. Clean or replace it when necessary. Check
intake system, particularly intake manifold, injector, vacuum pipe and connector,
whether they are leaking. Exclude the malfunction when necessary.
Fuel system
malfunction
Fuel pressure shall above 260kPa when idling. Otherwise, the fuel pressure is low,
and shall check fuel pump, fuel pressure controller and fuel pipe, whether there is
malfunction.
Engine signal plate
loose or moved
Check engine signal plate, whether is it loose or moved. When necessary, shall
position it (20 teeth after point T for 4-cylinder, 16 teeth after point T for 3-cylinder)
first, then weld or replace engine signal plate.
Exhaust system
blocked
Check or replace exhaust system blocking position
Low cylinder pressure
Measure cylinder pressure. Fill a few oil into cylinder to determine whether the
cylinder or piston ring worn out, as well as valve sealing leaking. Adjust valve
clearance or disassemble engine when cylinder pressure is too low.
Injector malfunction
Check both ends of connector of each injector by oscillograph or multimeter,
whether there is pulse signal. If not, shall check parts of controlling circuit or ECU.
Otherwise, remove injector and check fuel injection quantity and atomization,
whether it is normal. Clean or replace it when necessary.
Engine fails to
start
ECU malfunction
ECU controller fails to input or output signal normally, replace it.