Chery A11. Manual — part 180

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

1

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Yes

Go to Step 4

2

Unplug carbon canister control valve connector
from wire harness, check the voltage between Pin 1
of connector and cathode of power supply with a
multimeter to see if it is around 12V.

No

Go to next step

Yes

Repair or
replace wire
harness

3

Check power supply terminal wiring of carbon
canister control valve to see if open circuit or short
circuit to ground occurs.

No

Go to Step 2

Yes

Go to next step

4

Check the resistance between Pin 1 and Pin 2 of
carbon canister control valve with a multimeter to
see if it is between 22~30Ω at 20℃.

No

Replace
control valve

Yes

Diagnosis
Instruction

5

Check the voltage between Pin 1 of carbon canister
control valve connector and cathode of power
supply with a multimeter to see if it is around 3.7V.

No

Go to next step

Yes

Repair or
replace wire
harness

6

Check the connection between Pin 2 of carbon
canister control valve connector and Pin 46 of ECU
to see if open circuit occurs.

No

Diagnosis
Instruction

Failure code: P0444 too low driver stage control circuit voltage of carbon

canister control valve

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Yes

Go to Step 4

2

Unplug carbon canister control valve connector
from wire harness, check the voltage between Pin 1
of connector and cathode of power supply with a
multimeter to see if it is around 12V.

No

Go to next step

Yes

Repair or
replace wire
harness

3

Check power supply terminal wiring of carbon
canister control valve to see if open circuit or short
circuit to ground occurs.

No

Go to Step 2

Yes

Go to next step

4

Check the resistance between Pin 1 and Pin 2 of
carbon canister control valve with a multimeter to
see if it is between 22-30Ωat 20℃.

No

Replace
control valve

Yes

Diagnosis
Instruction

5

Check the voltage between Pin 1 of carbon canister
control valve connector and cathode of power
supply with a multimeter to see if it is around 3.7V.

No

Go to next step

28

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Yes

Repair or
replace wire
harness

6

Check the connection between Pin 2 of carbon
canister control valve connector and Pin 46 of ECU
to see if short circuit to ground occurs.

No

Diagnosis
Instruction

Failure code: P0445 too high driver stage control circuit voltage of carbon

canister control valve

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Yes

Go to Step 4

2

Unplug carbon canister control valve connector
from wire harness, check the voltage between Pin 1
of connector and cathode of power supply with a
multimeter to see if it is around 12V.

No

Go to next step

Yes

Repair or
replace wire
harness

3

Check power supply terminal wiring of carbon
canister control valve to see if open circuit or short
circuit to ground occurs.

No

Go to Step 2

Yes

Go to next step

4

Check the resistance between Pin 1 and Pin 2 of
carbon canister control valve with a multimeter to
see if it is between 22-30Ω at 20℃.

No

Replace
control valve

Yes

Diagnosis
Instruction

5

Check the voltage between Pin 1 of carbon canister
control valve connector and cathode of power
supply with a multimeter to see if it is around 3.7V.

No

Go to next step

Yes

Repair or
replace wire
harness

6

Check the connection between Pin 2 of carbon
canister control valve connector and Pin 46 of ECU
to see if short circuit occurs.

No

Diagnosis
Instruction

Failure code: P0480 control circuit error in relay of Cooling Fan A of air

conditioning condenser

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

2

Unplug cooling fan relay of air conditioning
condenser turn ignition switch to ON Check the

Yes

Go to Step 4

29

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

condenser, turn ignition switch to ON. Check the
voltage between power supply terminals of relay
(i.e. Pin 30 and 85 of relay) and cathode of power
supply to see if it is around 12V.

No

Go to next step

Yes

Repair or
replace wire
harness

3

Check power supply terminals of cooling fan relay
of air conditioning condenser to see if open circuit
or short circuit to ground occurs.

No

Go to Step 2

Yes Replace

relay

4

Check the voltage between control terminal (Pin 86)
of cooling fan relay of air conditioning condenser
and cathode of power supply with a multimeter to
see if it is around 3.7V.

No

Go to next step

Yes

Repair or
replace wire
harness

5

Check the connection between Pin 86 of relay and
Pin 50 of ECU to see if open circuit, short circuit to
power supply or to ground occurs.

No

Diagnosis
Instruction

Failure code: P0481 control circuit error in relay of Cooling Fan B of air

conditioning condenser

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes

Go to Step 4

2

Unplug cooling fan relay of air conditioning
condenser, turn ignition switch to ON. Check the
voltage between power supply terminals of relay
(i.e. Pin 30 and 85 of relay) and cathode of power
supply to see if it is around 12V.

No

Go to next step

Yes

Repair or
replace wire
harness

3

Check power supply terminals of cooling fan relay
of air conditioning condenser to see if open circuit
or short circuit to ground occurs.

No

Go to Step 2

Yes Replace

relay

4

Check the voltage between control terminal (Pin 86)
of cooling fan relay of air conditioning condenser
and cathode of power supply with a multimeter to
see if it is around 3.7V.

No

Go to next step

Yes

Repair or
replace wire
harness

5

Check the connection between Pin 86 of relay and
Pin 68 of ECU to see if open circuit, short circuit to
power supply or to ground occurs.

No

Diagnosis
Instruction

30

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Failure code: P0500 improper speed signal

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes Repair

ABS

2

For models equipped with ABS, please check ABS
to see if failure code occurs.

No

Go to next step

Yes

Go to next step

3

Check speedometer to see if the pointer works well.

No

Check and
repair
speedometer
circuit

Yes

Go to next step

4

Check speed sensor to see if it is in good condition.

No

Replace speed
sensor

Yes

Repair or
replace wire
harness

5

Check the connection between signal wire of speed
sensor and Pin 59 of ECU to see if open circuit,
short circuit to power supply or to ground occurs.

No

Diagnosis
Instruction

Failure code: P0506 lower idling speed than target value

Step Operation

Result Solution

1

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes

Go to next step

2

Check throttle regulating screw, throttle cable and
working conditions of throttle to see if they are
normal.

No

Carry out
necessary
inspection,
repair and
maintenance

Yes

Go to next step

3

Check working conditions of idle regulator to see if
they are in good order.

No

Carry out
necessary
inspection,
repair and
maintenance

Yes

Carry out
necessary
inspection and
repair

4

A. Check fuel system pressure to see if it is too low;
B. Check injectors for blockage;
C. Check system exhaust for blockage.

No

Diagnosis
Instruction

31