Great Wall GW491QE, Руководство по обслуживанию

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EF.1-34
S.N.
Operation steps
Check
result
Follow-up steps
Yes Next step.
10 Check whether the oil injector is able to inject oil after it has been washed.
No Change the oil injector
Yes Change the fuel
11 Check whether fuel contains water or has deteriorated.
No 18
Yes Next step.
12 Check whether the fuel pressure is below 250kpa.
No 17
Yes Next step.
13
Close the fuel manometer valve, and re-connect the ignition switch to have oil
pump working for three seconds, then check whether an oil pressure will be
produced.
No 16
Yes
Change the fuel pressure
adjustor
14
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
15 Check whether the oil inlet pipe has any leakage or has been blocked.
No Change the oil pump
Yes
Repair or change oil
return pipe
16 Check whether the oil return pipe has been bent or blocked.
No
Change the fuel pressure
adjustor
Yes Clean it.
17
Check whether sensing holes on the inlet-manifold pressure sensor and the
air-inlet temperature sensor have been blocked.
No Next step.
Yes Next step.
18
Have the engine running at idle-speed, and observe whether the oxygen sensor
is able to work in a normal way when the cooling-fluid temperature reaches the
activated temperature under a closed-loop control.
No
Check the oxygen sensor
and wiring harness.
Yes Settle the leakage.
19 Check whether the engine air-inlet system has leakage.
No Next step.
Yes Next step.
20 Check whether the pressure of engine cylinder is normal.
No Clear the failure away.
6
．
The idle-speed during vehicle heating process is unstable.
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
Have the engine running at idle-speed, check whether the pressure of inlet
manifold is within 35kpa and 65kpa during the vehicle heating process.
No
Settle the air leakage
within air inlet system.
Yes Next step.
4
Following a closure of engine and a connection of ignition switch, connect a
commutator between ECU and wiring harness, and check whether respective
voltage on Pin 44 &45 (the signal output end for air-inlet temperature sensor
and cooling-fluid temperature sensor respectively) of ECU is normal.
No Check and repair it.
Yes Next step.
5
Pull out the plug of idle-speed actuator before the vehicle heating process is
ended, and observe whether the engine rotating-speed could be changed.
No
Change the idle-speed
actuator.
Yes Next step.
6
Check whether the cooling-fluid temperature sensor is working in a normal
way.
No Change it.
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