Great Wall GW491QE, Руководство по обслуживанию

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EF.1-61
S.N. Operation steps
Check
result
Follow-up steps
Yes Next step.
4
A multimeter may be used to verify whether the resistance between Pin 1 and
Pin 2 of carbon-canister control valve is within
22-30
Ω
when at 20
℃
.
No Change the control valve.
Yes Diagnosis help.
5
A multimeter may be used to verify whether the voltage between the
connection Pin 1 of carbon-canister control valve 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 the connection Pin 2 of carbon-canister
control valve and Pin 46 of ECU is a broken loop.
No Diagnosis help.
Fault code
：
P0444 The voltage in the control loop of driving stage for carbon-canister control
valve is too low.
”
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 carbon-canister control valve from wiring harness, and a
multimeter may be used to verify the voltage between Pin 1 of the plug 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 (on power supply end) of carbon-canister control valve
is in a broken circuit or is short circuit to ground.
No
Continue to proceed until
step 2.
Yes Next step.
4
A multimeter may be used to verify whether the resistance between Pin 1 and
Pin 2 of carbon-canister control valve is within
22-30
Ω
when at 20
℃
. No Change the control valve.
Yes Diagnosis help.
5
A multimeter may be used to verify whether the voltage between the
connection Pin 1 of carbon-canister control valve 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 the connection Pin 2 of carbon-canister
control valve and the Pin 46 of ECU is short circuit to ground.
No Diagnosis help.
Fault code
：
P0445 The voltage in the control loop of driving stage for carbon-canister control
valve is too high.
”
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 carbon-canister control valve from wiring harness, and a
multimeter may be used to verify the voltage between Pin 1 of the plug 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 (on power supply end) of carbon-canister control valve
is in a broken circuit or is short circuit to ground.
No
Continue to proceed until
step 2.
Yes Next step.
4
A multimeter may be used to verify whether the resistance between Pin 1 and
Pin 2 of carbon-canister control valve is within
22-30
Ω
when at 20
℃
.
No Change the control valve.
Yes Diagnosis help.
5
A multimeter may be used to verify whether the voltage between the
connection Pin 1 of carbon-canister control valve 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 the connection Pin 2 of carbon-canister
control valve and Pin 46 of ECU is a broken loop.
No Diagnosis help.
Fault code
：
P0480 failure with the control loop of cooling-fan relay
”
S.N. Operation steps
Check
result
Follow-up steps
1
Connect with a diagnosis instrument, and place the ignition switch to the
OFF
”
position.
Next step.
Yes
Continue to proceed until
step 4.
2
Pull out the relay from the cooling-fan, place the ignition switch to the ON
”
position, and verify the voltage between the power supply end (ie. Pin 30 &85)
of relay and the negative electrode of power supply is about 12V.
No Next step.
M7.9.7 system service &diagnosis flow process based on fault code
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