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