Great Wall GW491QE, Руководство по обслуживанию

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EF.1-30
General troubleshooting and steps to engine
General troubleshooting and steps to M1.5.4 system
1. When starting, the engine is not rotating or rotating slowly.
S.N. Operation steps
Check
result
Follow-up steps
Yes Next step.
1
A multimeter may be used to check whether the voltage between two binding
posts of accumulator is within 10 and 12.5V.
No
Repair or change the
accumulator
Yes Next step.
2
Place ignition switch to the ON
”
position, and a multimeter may be used to
check whether its respective binding post connecting the positive electrode of
accumulator has a voltage between 10 and 12.5V.
No
Repair the binding posts
or change the lead-wire.
Yes Next step.
3
Keep the ignition switch on the starting
”
position, and a multimeter may be
used to check whether its respective binding post connecting the positive
electrode of starter has a voltage greater than 8V..
No
Repair or change the
ignition switch
Yes Next step.
4
Keep the ignition switch on the starting
”
position, and a multimeter may be
used to check whether the binding post on the positive electrode of starter has a
voltage greater than 8V.
No
Repair the binding posts
or change the lead-wire.
Yes Next step.
5
A multimeter may be used to check whether the starter is in a broken loop or
has short circuit.
No
Repair or change the
starting motor
Yes Clear the failure away.
6 Check whether the engine has got stuck due to bad lubrication.
No Next step.
Yes
Next step. And change
with appropriate oil.
7
If in Winter, check whether the large resistance inside starter is caused by the
selection of inappropriate engine lubricating oil and gear box oil.
No
Repair or change the
timing belt.
2. The hot vehicle is starting 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
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
Next step.
3
Disconnect the oil pipe and close the ignition switch; One hour later, observe
whether the pressure of fuel system is able to retain within 150kpa and 200kpa.
No
Repair the fuel pressure
system.
Yes
Change the fuel
pressure adjustor
4
Connect the oil pipe, and use an oil-return barrier to prevent oil from returning;
And close both fuel manometer valve and ignition switch; One hour later,
observe whether the pressure of fuel system is able to retain within 150kpa and
200kpa.
No Next step.
Yes
Change the oil pipe
&injector.
5
Check the oil pipe &injector for fuel leakage.
No Next step.
Yes
Check and repair the
cooling-fluid
temperature sensor and
relevant loops.
6
Pull out the plug of water-temperature sensor, and start the engine to see
whether it proves to be a success.
No Next step.
7
Connect a connector between ECU and wiring harness, and check whether the
Pin 18 /27 /37 of ECU has voltage, and whether the positive supply line
connecting the foresaid Pins of ECU plus the ground connection line
connecting the Pin 2 /14 /24 /19 of ECU is under a normal condition.
Yes Next step.
United Electronic engine management system-Genaral troubes hooting and steps
to engine
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