Chery A11. Manual - part 160

 

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Chery A11. Manual - part 160

 

 

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

 

Check the resistance between Pin 1 and Pin 2 of 
carbon canister control valve with a multimeter to 
see if it is between 17.5-23.5Ω  at 20℃. 

No 

Replace 
control valve 

Yes 

Diagnosis 
Instruction 

5 

Check the voltage between Pin 2 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 52 of ECU 
to see if short circuit to ground occurs. 

No 

Diagnosis 
Instruction 

 

Failure: 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 2 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 52 of ECU 
to see if short circuit occurs. 

No 

Diagnosis 
Instruction 

 

Failure: lower idling speed than target value 

Step Operation 

Result  Solution 

1 

Connect scanner and commutator, and  then  turn   

Go to next step

 

28

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

ignition switch to “OFF”. 

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 

 

Failure: higher 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 speed regulator to 
see if they are normal. 

No 

Carry out 
necessary 
inspection, 
repair and 
maintenance 

Yes 

Carry out 
necessary 
inspection and 
repair 

4 

A. Check system for air leakage; 
B.  Check injectors for leakage; 
C. Check fuel system pressure to see if it is too 

high. 

No 

Diagnosis 
Instruction 

 

 

29

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

Failure: too low control circuit voltage of idle speed regulator 

Step Operation 

Result  Solution 

1 

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

 

Go to next step

Yes 

Go to next step

2 

Unplug idle speed regulator connector, check 
respectively the resistances between Pin A and Pin 
D, Pin B and Pin C of the regulator with a 
multimeter too see if they are around 53Ω at 20℃.

No 

Replace 
stepper motor 

Yes 

Repair or 
replace wire 
harness 

3 

Check respectively the connections between Pin A, 
B, C, D of idle speed regulator connector and Pin 
64, 65, 57, 58 of ECU to see if short circuit to 
ground occurs. 

No 

Diagnosis 
Instruction 

 

Failure: too high control circuit voltage of idle speed regulator 

Step Operation 

Result  Solution 

1 

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

 

Go to next step

Yes 

Go to next step

2 

Unplug idle speed regulator connector, check 
respectively the resistances between Pin A and Pin 
D, Pin B and Pin C of the regulator with a 
multimeter too see if they are around 53Ω at 20℃.

No 

Replace 
stepper motor 

Yes 

Repair or 
replace wire 
harness 

3 

Check respectively the connections between Pin A, 
B, C, D of idle speed regulator connector and Pin 
64, 65, 57, 58 of ECU to see if short circuit occurs. 

No 

Diagnosis 
Instruction 

 

Failure: control circuit error of idle speed regulator 

Step Operation 

Result  Solution 

1 

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

 

Go to next step

Yes 

Go to next step

2 

Unplug idle speed regulator connector, check 
respectively the resistances between Pin A and Pin 
D, Pin B and Pin C of the regulator with a 
multimeter too see if they are around 53Ω at 20℃.

No 

Replace 
stepper motor 

3 

Check respectively the connections between Pin A, 
B, C, D of idle speed regulator connector and Pin 
64, 65, 57, 58 of ECU to see if open circuit occurs. 

Yes 

Repair or 
replace wire 
harness 

 

30

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

 

 

No 

Diagnosis 
Instruction 

 

Failure: improper system voltage signal 

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 battery voltage with a multimeter to see if it 
is around 12V. 

No 

Replace 
battery 

Yes 

Repair or 
replace wire 
harness 

3 

Check respectively the connections between Pin 44, 
45, 63 of ECU and Pin 87 of main relay to see if 
open circuit or short circuit to ground occurs. 

No 

Go to next step

Yes 

Go to next step

4 

Start engine, check charging voltage of generator at 
different engine speeds to see if it maintains within 
9-16V. 

No 

Replace 
generator 

Yes 

Diagnosis 
Instruction 

5 

Check ground point of engine wire harness to see if 
it is normal. 

No 

Repair or 
replace wire 
harness 

 

Failure: too low system voltage 

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 battery voltage with a multimeter to see if it 
is around 12V. 

No 

Replace 
battery 

Yes 

Repair or 
replace wire 
harness 

3 

Check respectively the connections between Pin 14, 
15, 29 of ECU and supply wire to see if the 
resistances are too high. 

No 

Go to next step

Yes 

Go to next step

4 

Start engine, check charging voltage of generator at 
different engine speeds to see if it maintains within 
9-16V. 

No 

Replace 
generator 

5 

Check ground point of engine wire harness to see if 
it is in good condition. 

Yes 

Diagnosis 
Instruction 

 

31

 

 

 

 

 

 

 

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