Geely Diagnosis Flow. Manual part - 40
Geely Diagnosis Flow. Manual part - 40
157
No.115 Engine not running or slowly running while startup
General malfunction part: 1. battery; 2. startup motor; 3. harness or ignition switch; 4. mechanical
parts of the engine. General diagnosis flowchart:
Serial No. Operation steps
Results
Follow-ups
Yes Next
step
1
Check voltage between two binding posts of battery is around 8-12V
while the engine is started with the multimeter.
No Replace
battery
Yes Next
step
2
With ignition switch at starting position, check binding post of anode of
startup motor is with voltage above 8V with the multimeter.
No
Repair or replace
harness
Yes
Repair or replace
starting motor
3
Remove startup motor, and check its working conditions. Mainly check it
is open circuited or jammed due to poor lubrication.
No Next
step
Yes
Replace for
lubricating oil with
proper grade
4
If malfunction only occurs in winter, check resistance of startup motor is
too large due to improper selection of lubricating oil and gear case oil.
No Next
step
Yes
Check internal
resistance of
engine
5
Check internal mechanical resistance of the engine is too large, causing
startup motor not running or slowly running.
No Diagnosis
help
158
No.116 While startup, engine running, but unable to start
General malfunction part: 1. oil tank without oil; 2. fuel pump; 3. speed sensor; 4. ignition coil; 5.
mechanical part of engine. General diagnosis flowchart:
Serial No. Operation steps
Results
Follow-ups
Yes Next
step
1
Connect fuel pressure gauge (access point is front end of oil sucker of
fuel distribution pipe assembly), and start the engine, and check fuel
pressure is around 350kPa.
No
Repair oil supply
system
Yes Next
step
2
Connect diagnosis instrument of electric injection system and observe
“engine speed”. Start the engine and observe speed signal is output.
No
Repair speed
sensor lines
Yes Next
step
3
Take out line of one cylinder, and connect spark plug, making spark plug
electrode about 5mm away from engine body. Startup the engine and
check there is high pressure spark.
No
Repair ignition
system
Yes
Eliminate
mechanical failure
4
Check pressure of each cylinder of the engine, and observe engine
cylinder is with insufficient pressure.
No Next
step
Yes Diagnosis
help
5
Connect commutator of electric injection system, and open ignition
switch, and check power supply of 12#, 13#, 44#, 45#, ,63# pins are
normal; check bonding of 3#, 51#, 53#, 61#, 80# pins are normal.
No
Repair
corresponding lines
159
No.117 Difficult to start for hot startup
General malfunction part: 1. fuel containing water; 2. fuel pump; 3. cooling liquid temperature
sensor; 4. fuel pressure regulator vacuum pipe; 5. ignition coil.
General diagnosis flowchart:
Serial No. Operation steps
Results
Follow-ups
Yes Next
step
1
Connect fuel pressure gauge (access point is front end of oil sucker of
fuel distribution pipe assembly), and start the engine, and check fuel
pressure is around 350kPa.
No
Repai r oil supply
system
Yes Next
step
2
Take out line of one cylinder, and connect spark plug, making spark plug
electrode about 5mm away from engine body. Startup the engine and
check there is high pressure spark.
No
Repair ignition
system
Yes
Repair lines or
replace sensor
3
Take out connector of cooling liquid temperature sensor, and start the
engine. Observe the engine is successfully started at this point. (or
connect one 300ohm resistance in series at connector of this sensor to
replace cooling liquid temperature sensor and observe the engine is
successfully started at this point.)
No Next
step
Yes
Repair or replace
4
Check fuel pressure regulator vacuum pipe is loosening or air leaking.
No Next
step
Yes Replace
fuel
5
Check fuel condition and observe malfunction is caused just after
refueling.
No Next
step
Yes Diagnosis
help
6
Connect commutator of electric injection system, and open ignition
switch, and check power supply of 12#, 13#, 44#, 45#, ,63# pins are
normal; check bonding of 3#, 51#, 53#, 61#, 80# pins are normal.
No
Repair
corresponding lines
160
No.118 Difficult to start for cold startup
General malfunction part:1. fuel containing water; 2. fuel pump; 3. cooling liquid temperature
sensor; 4. oil injector; 5. ignition coil;
6. throttle valve body and idling speed bypass duct; 7. mechanical parts of engine. General
diagnosis flowchart:
Serial No. Operation steps
Results
Follow-ups
Yes Next
step
1
Connect fuel pressure gauge (access point is front end of oil sucker of
fuel distribution pipe assembly), and start the engine, and check fuel
pressure is around 350kPa.
No
Repai r oil supply
system
Yes Next
step
2
Take out line of one cylinder, and connect spark plug, making spark plug
electrode about 5mm away from engine body. Startup the engine and
check there is high pressure spark.
No
Repair ignition
system
Yes
Repair lines or
replace sensor
3
Take out connector of cooling liquid temperature sensor, and start the
engine. Observe the engine is successfully started at this point. (or
connect one 300ohm resistance in series at connector of this sensor to
replace cooling liquid temperature sensor and observe the engine is
successfully started at this point.)
No Next
step
Yes
Clean throttle valve
and idling speed
duct
4
Step on the throttle lightly, and observe it is easily started.
No Next
step
Yes
Replace
malfunctiony ones
5
Remove oil injector, and check it is leaking or blocked with special
cleaning and analysis instrument.
No Next
step
Yes Replace
fule
6
Check fuel condition and observe malfunction is caused just after
refueling.
No Next
step
Yes
Eliminate
mechanical failure
7
Check pressure of each cylinder of the engine, and observe engine
cylinder is with insufficient pressure.
No Next
step
Yes Diagnosis
help
8
Connect commutator of electric injection system, and open ignition
switch, and check power supply of 12#, 13#, 44#, 45#, ,63# pins are
normal; check bonding of 3#, 51#, 53#, 61#, 80# pins are normal.
No
Repair
corresponding lines