Great Wall GW491QE, Руководство по обслуживанию

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EF.1-31
S.N. Operation steps
Check
result
Follow-up steps
Yes
Ended.
8
Change the fuel, and perform a hot starting process again to see whether the
starting is successful.
No Change the ECU
Yes
Next step.
9
Check whether the fuel pipe has been bent or blocked, and whether the
pressure-adjustment valve of oil pump is able to work in a normal way.
No Repair or change fuel pipe
Yes
Next step.
10
A multimeter may be used to check whether there’s any accumulator voltage
on two ends of socket connector for fuel pump.
No
Repair or change the
lead-wire for fuel relay.
Yes Next step.
11
A multimeter may be used to check whether the resistance value of fuel
pump is correct.
No Change the fuel pump
Yes Change the fuel pump
12 Check whether the fuel pump has got stuck.
No Change the ECU
3
．
Despite of a normal rotating-speed, the starting is always with difficulty
S.N. Operation steps
Check
result
Follow-up steps
Yes
Clear the displayed failure
away.
1
Place ignition switch to the ON
”
position. A fault diagnosis instrument may
be used to check whether there’s any record of failure information.
No Next step.
Yes Next step.
2 Check whether the passage of air filter is free.
No Change it.
Yes Next step.
3
Following a successful starting process, check whether the pressure of inlet
manifold when at idle-speed is within 35-65kpa.
No
Settle the air leakage within
air inlet system.
Yes
Check the throttle valve,
and idle-speed passage.
4 Observe whether it’s easy to start by gently stepping on the throttle valve.
No Next step.
Yes Next step.
5
Connect the fuel manometer valve. And have the Pin 30 of fuel pump relay
short-circuit connected with the Pin 87, and check whether the fuel pressure
is within 250kpa and 300kpa while the fuel pump is working.
No
9
Yes 8
6
Check whether the oil injector is working after it has been provided with a
12V voltage by accumulator via special connector.
No Next step.
Yes Next step.
7
Check whether the oil injector is able to work normally after it has been
washed.
No Change the oil injector
Yes Change the fuel
8 Check whether fuel contains water or has deteriorated.
No 14
Yes Next step.
9 Check whether the fuel pressure is below 250kpa.
No 12
Yes Next step.
10
Close the fuel manometer valve, and re-connect the electric spark switch to
have oil pump working for three seconds, then check whether an oil pressure
will be produced.
No 12
Yes
Change the fuel pressure
adjustor
11
Open the fuel manometer valve, and clamp the oil return pipe using oil-return
barrier to prevent oil from returning, then check whether an oil pressure will
be produced.
No
Repair or change the oil
injector or oil pipe.
Yes
Repair or change oil inlet
pipe
12 Check whether the oil inlet pipe has leakage or has been blocked.
No Change the oil pump
Yes
Repair or change oil return
pipe
13 Check whether the oil return pipe has been bent or blocked.
No
Change the fuel pressure
adjustor
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