Great Wall GW491QE, Руководство по обслуживанию

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EF.1-39
S.N. Operation steps
Check
result
Follow-up steps
Yes Next step.
5
After the connection of ignition switch, connect a commutator between ECU
and wiring harness, and check whether respective voltage on Pin 53 (the signal
output end for throttle position sensor), Pin 30 (ground end), and Pin 12 (used
as one 4.5V-5V power supply to sensor) of ECU is normal.
No
Repair or change the
wiring harness
Yes Next step.
6
Have the engine running at idle-speed, and do not connect the Pin 51 of ECU
to ground via short connection wire before the cooling-fluid temperature
reaches its normal value; Check whether the ignition lead-angle is of a 6.75
o
rotating angle of crankshaft.
No
Adjust the ignition
lead-angle.
Yes Next step.
7
Connect the fuel manometer valve (the connection point may vary depending
on the type of vehicle). 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 11
Yes 10
8
Check whether the oil injector is working in a normal way after it’s been
provided with a 12V voltage by accumulator via special connector.
No Next step.
Yes Next step.
9
Re-check whether the oil injector is working in a normal way after it’s been
washed.
No Change the oil injector
Yes Change the fuel
10 Check whether fuel contains water or has deteriorated.
No 16
Yes Next step.
11 Check whether the fuel pressure is below 250kpa.
No 15
Yes Next step.
12
When the valve on fuel meter is closed before a re-connection with ignition
switch to drive the fuel pump working for another three seconds, check
whether it’s able to produce an oil pressure.
No 14
Yes
Change the fuel pressure
adjustor
13
When the valve on fuel meter is opened before oil return pipe is being clamped
by oil-return barrier to stop oil return, check whether it’s able to produce oil
pressure rapidly.
No
Repair or change the oil
injector or oil pipe.
Yes
Repair or change the oil
inlet pipe
14 Check whether the oil inlet pipe has leakage or has been blocked.
No Change the oil pump
15 Check whether the oil return pipe has been bent or blocked. Yes
Repair or change the oil
return pipe
13
．
The acceleration is slack and with inferior performance.
S.N. Operation steps
Check
result
Follow-up steps
Yes Repair it.
1 Failure like inappropriate positioning of four wheels, etc.
No Next step.
Yes Next step.
2 Check whether the throttle valve is able to be full opened.
No
Repair or change the
throttle valve
Yes
Clear the displayed failure
away.
3
A fault diagnosis instrument may be used to check whether there’s any record
of failure information after ignition switch is placed to the
ON
”
position.
No Next step.
Yes Next step.
4
Place ignition switch on the ON
”
position, and check whether respective
voltage on the Pin 7 output of absolute-pressure sensor for inlet manifold ,
Pin 53 throttle position sensor , Pin 44 output of air-inlet temperature
sensor , Pin 45 output of cooling-fluid temperature sensor , Pin 10 &28 used
as ground end and signal output end of oxygen sensor respectively
, Pin 30
signal ground end of oxygen sensor , and Pin 12 used as one 4.5V~5V
power supply to sensor of ECU is normal.
No
Repair or change the
wiring harness
Yes Next step.
5
Check whether the inlet-air pressure is within 35kpa and 65kpa while engine is
running at idle-speed.
No Check and repair it.
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