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