Great Wall GW491QE, Руководство по обслуживанию

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EF.1-42
S.N. Operation steps
Check
result
Follow-up steps
Yes Change the fuel
1
Check the fuel condition, and observe whether the symptom is caused by the
filling with petrol.
No Next step.
Yes Next step.
2
Open the ignition switch to check whether respective power supply to Pin 12,
13, 44, 45, 63 is under a normal condition; and whether respective metal part
overlapped on Pin 3, 51, 53, 61, 80 is under a normal condition.
No Diagnosis help.
4
．
The cold vehicle is starting with difficulty.
S.N. Operation steps
Check
result
Follow-up steps
Yes Next step.
1
After the connection with fuel manometer (the connection point is on the front
end of oil inlet pipe included in the fuel distributing pipe assembly), check
whether the fuel pressure keeps at about 260 kpa while engine is running at
idle-speed; and whether the fuel pressure keeps at about 300kpa after vacuum
pipe has been pulled away from the fuel pressure adjustor.
No
Check and repair the oil
supply system.
Yes Next step.
2
Pull out the division line from one of cylinders before it’s connected with spark
plug, and keep the electrode of spark plug about 5mm away from engine body,
and check whether blue &white high-voltage fire is produced while the engine
is running.
No
Check the ignition
system.
Yes
Check and repair
relevant loops or change
the sensor.
3
Pull out the plug from the cooling-fluid temperature sensor, and start the
engine; Observe whether the starting of engine proves to be a success.
Or a
2500 ohm resistor may be serially connected at the joint of cooling-fluid
temperature sensor to substitute the sensor, then observe whether engine may
be started successfully.
No Next step.
Yes
Wash the throttle valve
and the idle-speed air
duct.
4 Observe whether it’s easy to start by gently stepping on the throttle valve.
No Next step.
Yes
Change the failed
components.
5
Remove the oil injector, and check whether it has any leakage or has been
blocked using a special washing analyzer instrument.
No Next step.
Yes Change the fuel
6
Check the fuel condition, and observe whether the symptom is caused by the
filling with petrol.
No Next step.
Yes
Settle the mechanical
failure on engine.
7
Check and observe whether the pressure inside each engine cylinder is
insufficient.
No Next step.
Yes Diagnosis help.
8
Open the ignition switch to check whether respective power supply to Pin 12,
13, 44, 45, 63 is under a normal condition; and whether respective metal part
overlapped on Pin 3, 51, 53, 61, 80 is under a normal condition.
No
Check and repair
relevant loops.
5
．
Despite of a normal rotating-speed, the starting at any time is with difficulty.
S.N. Operation steps
Check
result
Follow-up steps
Yes
Check and repair the air
inlet system.
1 Check the air filter for blockage, and the air inlet passage for air leakage.
No Next step.
Yes Next step.
2
After the connection with fuel manometer (the connection point is on the front
end of oil inlet pipe included in the fuel distributing pipe assembly), check
whether the fuel pressure keeps at about 260 kpa while engine is running at
idle-speed; and whether the fuel pressure keeps at about 300kpa after vacuum
pipe has been pulled away from the fuel pressure adjustor.
No
Check and repair the oil
supply system.
Yes Next step.
3
Pull out the division line from one of cylinders before it’s connected with spark
plug, and keep the electrode of spark plug about 5mm away from engine body,
and check whether blue &white high-voltage fire is produced while the engine
is running.
No
Check and repair the
ignition system.
Yes Next step.
4
Check and observe whether the model and clearance of spark plug on each
cylinder is in compliance with the specification.
No Adjust or change it.
United Electronic engine management system-Genaral troubes hooting and steps
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