Geely Diagnosis Flow. Manual part - 42

Geely Diagnosis Flow. Manual part - 42


165

No.123 Normal startup, idling speed is instable or the vehicle will flame

out when partially loaded (such as: when air conditioner is on)

General malfunction part: 1. air conditioning system; 2、idling speed regulator; 3. oil injector.
General diagnosis flowchart:

Serial
No.

Operation steps

Results

Follow-ups

Yes

Clean concerned
parts

1

Remove idling speed regulator, and check throttle valve body, idling speed
regulator and idling speed bypass air duct are with carbon deposit.

No Next

step

Yes

To step 4

2

Observe output power of the engine is increased while air conditioner is on, i.e.
observe changes of ignition advance angle, oil injection pulse width and air input
with diagnosis instrument of electric injection system.

No Next

step

Yes Next

step

3

Connect commutator of electric injection system, and disconnect connecting line of
75# pin of electronic control unit. Check there is high level signal at harness end
when air conditioner is on.

No

Repair air
conditioning
system

Yes Next

step

4

Check pressure of air conditioning system, electromagnetic clutch of air
compressor and AC compression pump are normal.

No

Repair air
conditioning
system

Yes

Replace
malfunction ones

5

Remove oil injector, and check it is leaking or blocked, or flow with out of tolerance
with special cleaning and analysis instrument.

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


166

No.124 Normal startup, the idling speed is too high

General malfunction part: 1. throttle valve body and idling speed bypass air duct; 2. vacuum pipe;
3. idling speed regulator; 4. cooling liquid temperature sensor; 5. ignition timing.
General diagnosis flowchart:

Serial No. Operation steps

Results

Follow-ups

Yes Adjust

1

Check throttle cable is jammed or too tightening.

No Next

step

Yes

Repair air intake
system

2

Check vacuum pipe of intake system and connection is leaking.

No Next

step

Yes

Clean concerned parts

3

Remove idling speed regulator, and check throttle valve body, idling
speed regulator and idling speed bypass air duct are with carbon deposit.

No Next

step

Yes

Repair lines or replace
sensor

4

Take out connector of cooling liquid temperature sensor, start the engine
and observe the engine's idling speed is too high at this time.

No Next

step

Yes Next

step

5

Check ignition timing of the engine conforms to the specification.

No Repair

ignition

timing

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


167

No.125 Unable to rotating speed or flameout while accelerating

General malfunction part:1. fuel containing water; 2. intake pressure sensor and throttle valve
position sensor; 3. spark plug; 4. throttle valve body and idling speed bypass air duct; 5.intake
duct; 6. idling speed regulator; 7. oil injector; 8. ignition timing; 9. exhaust pipe. General
diagnosis flowchart:

Serial No. Operation steps

Results

Follow-ups

Yes

Repair air intake system

1

Check air filter is blocked.

No Next

step

Yes Next

step

2

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 during accelerating.

No

Repair oil supply system

Yes Next

step

3

Check spark plug of each cylinder, and observe its type and clearance
conform to the specifications.

No

Adjust or replace

Yes

Clean concerned parts

4

Remove idling speed regulator, and check throttle valve body, idling
speed regulator and idling speed bypass air duct are with carbon deposit.

No Next

step

Yes Next

step

5

Check intake pressure sensor, throttle valve position sensor and its lines
are normal.

No

Repair lines or replace
sensor

Yes

Replace malfunction
ones

6

Remove oil injector, and check it is leaking or blocked with special
cleaning and analysis instrument.

No Next

step

Yes Replace

fuel

7

Check fuel condition and observe malfunction is caused just after
refueling.

No Next

step

Yes Next

step

8

Check ignotion sequence and ignition timing of the engine conform to the
specifications.

No Repair

ignition

timing

Yes Next

step

9

Check exhaust pipe is smoothly exhausted.

No

Repair or replace
exhaust pipe

Yes Diagnosis

help

10

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


168

No.126 Slow reaction while accelerating

General malfunction part:1. fuel containing water; 2. intake pressure sensor and throttle valve
position sensor; 3. spark plug;4. throttle valve body and idling speed bypass air duct; 5.intake
duct;6. idling speed regulator; 7. oil injector; 8. ignition timing; 9. exhaust pipe. General diagnosis
flowchart:

Serial No. Operation steps

Results

Follow-ups

Yes

Repair air intake
system

1

Check air filter is blocked.

No Next

step

Yes Next

step

2

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 during accelerating.

No

Repair oil supply
system

Yes Next

step

3

Check spark plug of each cylinder, and observe its type and clearance
conform to the specifications.

No

Adjust or replace

Yes

Clean concerned parts

4

Remove idling speed regulator, and check throttle valve body, idling
speed regulator and idling speed bypass air duct are with carbon deposit.

No Next

step

Yes Next

step

5

Check intake pressure sensor, throttle valve position sensor and its lines
are normal.

No

Repair lines or replace
sensor

Yes

Replace malfunction
ones

6

Remove oil injector, and check it is leaking or blocked with special
cleaning and analysis instrument.

No Next

step

Yes Replace

fuel

7

Check fuel condition and observe malfunction is caused just after
refueling.

No Next

step

Yes Next

step

8

Check ignition sequence and ignition timing of the engine conform to the
specifications.

No Repair

ignition

timing

Yes Next

step

9

Check exhaust pipe is smoothly exhausted.

No

Repair or replace
exhaust pipe

Yes Diagnosis

help

10

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

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