Great Wall GW491QE, Руководство по обслуживанию

Страница: 77 / 222

EF.1-58
Fault code
：
P0201 Failure with the loop of fuel injector inside cylinder 1
”
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 1 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 1 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 1 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 1 and the negative electrode of power supply is about
3.7V.
No Next step.
Fault code
：
P0202 Failure with the loop of fuel injector inside cylinder 2
”
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 2 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 2 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 2 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 2 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 2 and the
Pin 6 of ECU is a broken loop, or short circuit to ground or power supply.
No Diagnosis help.
Fault code
：
P0203 Failure with the loop of fuel injector inside cylinder 3
”
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 3 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 3 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 3 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 3 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 3 and the
Pin 7 of ECU is a broken loop, or short circuit to ground or power supply.
No Diagnosis help.
M7.9.7 system service &diagnosis flow process based on fault code
ProCarManuals.com