Chery A15. Manual - part 39

 

Diagnostic trouble code: P0444 “Undervoltage in control circuit of drive stage of 
carbon canister control valve” 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up procedure 

1 

Connect the diagnostic tester and 
adaptor, and turn the ignition switch to 
“ON” position. 

 

Proceed to next step. 

Yes 

Proceed to Step 4 

2 

Disconnect the connector of carbon 
canister control valve on the wiring 
harness, inspect with multimeter to 
verify that the voltage between 1# pin 
of this connector and the negative grid 
of power supply is about 12V. 

No 

Proceed to next step. 

Yes 

Repair or replace the 

wiring harness. 

3 

Verify that the power supply circuit of 
carbon canister control valve is open 
or short to ground. 

No 

Proceed to Step 2 

Yes 

Proceed to next step. 

4 

Inspect with multimeter to verify that 
the resistance between 1# and 2# pins 
of carbon canister control valve is 
within 22-30Ω under 20 .

℃

 

No 

Replace the control 

valve. 

Yes 

Refer to diagnosis 

help. 

5 

Inspect with multimeter to verify that 
the voltage between 1# pin of carbon 
canister control valve connector and 
the negative grid of power supply is 
about 3.7V. 

No 

Proceed to next step. 

Yes 

Repair or replace the 

wiring harness. 

6 

Verify that the circuit between 2# pin 
of carbon canister control valve 
connector and 46# pin of ECU is short 
to ground. 

No 

Refer to diagnosis 

help. 

 
 

 

 

 

 

 

 

 

 

 

G-44

 

Diagnostic trouble code: P0445 “Overvoltage in control circuit of drive stage of 
carbon canister control valve” 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up procedure 

1 

Connect the diagnostic tester and 
adaptor, and turn the ignition switch to 
“ON” position. 

 

Proceed to next step. 

Yes 

Proceed to Step 4 

2 

Disconnect the connector of carbon 
canister control valve on the wiring 
harness, inspect with multimeter to 
verify that the voltage between 1# pin 
of this connector and the negative grid 
of power supply is about 12V. 

No 

Proceed to next step. 

Yes 

Repair and replace the 

wiring harness. 

3 

Verify that the power supply circuit of 
carbon canister control valve is open or 
short to ground. 

No 

Proceed to Step 2 

Yes 

Proceed to next step. 

4 

Inspect with multimeter to verify that 
the resistance between 1# and 2# pins 
of carbon canister control valve is 
within 22-30Ω under 20 .

℃

 

No 

Replace the control 

valve. 

Yes 

Refer to diagnosis 

help. 

5 

Inspect with multimeter to verify that 
the voltage between 1# pin of carbon 
canister control valve connector and 
the negative grid of power supply is 
about 3.7V. 

No 

Proceed to next step. 

Yes 

Repair or replace the 

wiring harness. 

6 

Verify that the circuit between 2# pin 
of carbon canister control valve 
connector and 46# pin of ECU is short 
to power supply. 

No 

Refer to diagnosis 

help. 

 
 

 

 

 

 

 

 

 

 

 

G-45

 

Diagnostic trouble code: P0480 “Malfunction in control circuit of relay of A/C 
condenser fan A” 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up procedure 

1 

Connect the diagnostic tester and 
adaptor, and turn the ignition switch to 
“OFF” position. 

 

Proceed to next step. 

Yes 

Proceed to Step 4 

2 

Pull out the relay of A/C condenser 
fan, turn the ignition switch to “ON” 
position and verify that the voltage 
between the power supply terminal of 
the relay (i.e. 30# and 85# pins of the 
relay) and the negative grid of power 
supply is about 12V. 

No 

Proceed to next step. 

Yes 

Repair or replace the 

wiring harness. 

3 

Verify that the power supply circuit of 
the relay of A/C condenser fan is open 
or short to ground. 

No 

Proceed to Step 2 

Yes 

Replace the relay. 

4 

Inspect with multimeter to verify that 
the voltage between the control 
terminal of relay of A/C condenser fan 
(i.e. 86# pin of the relay) and the 
negative grid of power supply is about 
3.7V. 

No 

Proceed to next step. 

Yes 

Repair or replace the 

wiring harness. 

5 

Verify that the circuit between the 
control terminal of relay (i.e. 86# pin 
of the relay) and 50# pin of ECU is 
open, or is short to power supply or to 
ground. 

No 

Refer to diagnosis 

help. 

 

 

 

 

 

 

 

 

 

 

 

G-46

 

Diagnostic trouble code: P0481 “Malfunction in control circuit of relay of A/C 
condenser fan B” 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up 

procedure 

1 

Connect the diagnostic tester and adaptor, 
and turn the ignition switch to “OFF” 
position. 

 

Proceed to next 

step. 

Yes 

Proceed to Step 4 

2 

Pull out the relay of A/C condenser fan, 
turn the ignition switch to “ON” position 
and verify that the voltage between the 
power supply terminal of the relay (i.e. 
30# and 85# pins of the relay) and the 
negative grid of power supply is about 
12V. 

No 

Proceed to next 

step. 

Yes 

Repair or replace 

the wiring harness.

3 

Verify that the power supply circuit of the 
relay of A/C condenser fan is open or short 
to ground. 

No 

Proceed to Step 2 

Yes 

Replace the relay. 

4 

Inspect with multimeter to verify that the 
voltage between the control terminal of 
relay of A/C condenser fan (i.e. 86# pin of 
the relay) and the negative grid of power 
supply is about 3.7V. 

No 

Proceed to next 

step. 

Yes 

Repair or replace 

the wiring harness.

5 

Verify that the circuit between the control 
terminal of relay (i.e. 86# pin of the relay) 
and 68# pin of ECU is open or is short to 
power supply or to ground. 

No 

Refer to diagnosis 

help. 

 

 

 

 

 

 

 

 

 

 

 

 

 

G-47