Great Wall GW491QE, Руководство по обслуживанию

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EF.1-59
Fault code
：
P0203 Failure with the loop of fuel injector inside cylinder 4
”
S.N. Operation steps
Check
result
Follow-up steps
1
Connect with the diagnosis instrument, and place the ignition switch to the
ON
”
position.
Next step.
Yes
Continue to proceed until
step 4.
2
Pull out the plug of fuel injector for cylinder 4 from wiring harness, and a
multimeter may be used to verify whether the voltage between the connection
Pin 1 and the negative electrode of power supply is about 12V.
No Next step.
Yes
Repair or change the wiring
harness.
3
Check whether the loop between the connection Pin 1 of fuel injector for
cylinder 4 and main relay is a broken loop, or short circuit to ground.
No Next step.
Yes Next step.
4
A multimeter may be used to check whether the resistance between Pin 1 and
Pin 2 of fuel injector for cylinder 4 is within
11-17
Ω
when at 20
℃
. No Change the fuel injector
Yes Diagnosis help.
5
A multimeter may be used to check whether the voltage between Pin 2 of fuel
injector for cylinder 4 and the negative electrode of power supply is about
3.7V.
No Next step.
Yes
Repair or change the wiring
harness.
6
Check whether the loop between Pin 2 of fuel injector for cylinder 4 and the
Pin 47 of ECU is a broken loop, or short circuit to ground or power supply.
No Diagnosis help.
Fault code
：
P0230 Failure with the control loop of fuel pump
”
S.N. Operation steps
Check
result
Follow-up steps
1
Connect with the diagnosis instrument, and place the ignition switch to the
ON
”
position.
Next step.
Yes
Continue to proceed until
step 4.
2
Pull out the fuel pump relay, place the ignition switch to the “ON” position,
and check whether respective voltage between the negative electrode of power
supply and the power supply end (ie. Pin 30 &86) of fuel pump relay is about
12V.
No Next step.
Yes
Repair or change the wiring
harness.
3
Check whether the loop on the power supply end of relay is a broken loop or
short circuit to ground.
No Next step.
Yes
Change the fuel pump
relay.
4
A multimeter may be used to check whether the resistance between Pin 1 and
Pin 2 of fuel injector for cylinder 1 is within
11-17
Ω
when at 20
℃
.
No Next step.
Yes Diagnosis help.
5
A multimeter may be used to check whether the voltage between the control
end (ie.Pin 85) of fuel pump relay and the negative electrode of power supply
is about 3.7V.
No Next step.
Fault code P0324 Failure with the processing chip of knock signal, and its loops.
”
S.N. Operation steps
Check
result
Follow-up steps
1
Connect with the diagnosis instrument, and place the ignition switch to the
ON
”
position.
Next step.
Yes Next step.
2 Eliminate any fault code, and re-check whether the failure is a stable failure.
No System is normal.
3 Change the ECU.
Fault code
：
P0325 Failure with the loop of knock sensor.
”
S.N. Operation steps
Check
result
Follow-up steps
1
Connect with the diagnosis instrument, and place the ignition switch to the
ON
”
position.
Next step.
Yes Next step.
2
Pull out the plug of knock sensor from wiring harness, and a multimeter may
be used to verify whether resistance between Pin 1 and Pin 2 of knock sensor is
greater than 1M
Ω
.
No Change the sensor.
Yes
Repair or change the wiring
harness.
3
Check whether respective loops between the connection pin 1 &2 of knock
sensor and Pin 19 &20 of ECU are broken loops, or short circuit to ground or
power supply.
No Next step.
Yes Diagnosis help.
4
Change the knock sensor as per installation specification. Have a loop test and
make the rotating-speed of engine greater than 2200 revolutions per minute.
And re-check whether the fault code P0325 will be shown.
No
Continue to proceed until
step 3.
M7.9.7 system service &diagnosis flow process based on fault code
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