Chery A11. Manual - part 161

 

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Chery A11. Manual - part 161

 

 

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

 

 

No 

Repair or 
replace wire 
harness 

 

Failure: too high system votage 

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 

Go to next step

3 

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 

4 

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

No 

Repair or 
replace wire 
harness 

 

Failure: non-programmed check code error of ECU 

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 

Clear failure code, recheck the failure to see if it is a 
constant failure. 

No System 

normal

3 Replace 

ECU. 

Finish 

 

Failure: non-programmed diagnostic data identification code error of ECU 

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 

Clear failure code, recheck the failure to see if it is a 
constant failure. 

No System 

normal

3 Replace 

ECU. 

Finish 

 

Failure: control circuit error of air conditioner compressor relay 

Step Operation 

Result  Solution 

 

32

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

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 air conditioner compressor relay, turn 
ignition switch to “ON”, check voltages between 
Pin 30, 85 of relay and cathode of power supply to 
see if they are around 12V. 

No 

Go to next step

Yes 

Repair or 
replace wire 
harness 

3 

Check power supply terminal circuit of relay to see 
if open circuit or short circuit to ground occurs. 

No 

Go to Step 2 

Yes Replace 

relay 

4 

Check the voltage between Pin 86 of relay (control 
terminal of air conditioner compressor relay) and 
cathode of power supply 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 
(control terminal of air conditioner compressor 
relay) and Pin 41 of ECU to see if open circuit 
occurs. 

No 

Diagnosis 
Instruction 

 

Failure: too low control circuit voltage of air conditioner compressor relay 

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 air conditioner compressor relay, turn 
ignition switch to “ON”, check voltages between 
Pin 30, 85 of relay (power supply terminals of 
relay) and cathode of power supply to see if they are 
around 12V. 

No 

Go to next step

Yes 

Repair or 
replace wire 
harness 

3 

Check power supply terminal circuit of relay to see 
if open circuit or short circuit to ground occurs. 

No 

Go to Step 2 

Yes Replace 

relay 

4 

Check the voltage between Pin 86 of relay (control 
terminal of air conditioner compressor relay) and 
cathode of power supply 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 
(control terminal of air conditioner compressor 
relay) and Pin 41 of ECU to see if short circuit to 
ground occurs. 

No 

Diagnosis 
Instruction 

 

 

33

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

Failure: too high control circuit voltage of air conditioner compressor relay 

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 air conditioner compressor relay, turn 
ignition switch to “ON”, check voltages between 
Pin 30, 85 of relay and cathode of power supply to 
see if they are around 12V. 

No 

Go to next step

Yes 

Repair or 
replace wire 
harness 

3 

Check power supply terminal circuit of relay to see 
if open circuit or short circuit to ground occurs. 

No 

Go to Step 2 

Yes Replace 

relay 

4 

Check the voltage between Pin 86 of relay (control 
terminal of air conditioner compressor relay) and 
cathode of power supply 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 
(control terminal of air conditioner compressor 
relay) and Pin 41 of ECU to see if short circuit 
occurs. 

No 

Diagnosis 
Instruction 

 

Failure: control circuit error of fault indicating lamp 

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 

Test operation of engine fault indicating lamp using 
“Actuator Operation Test” function of scanner, 
observe if it keeps off or on. 

No System 

normal

Yes 

Repair or 
replace wire 
harness 

3 

Check fault indicating lamp power supply terminal 
circuit of engine to see if open circuit or short 
circuit to ground occurs. 

No 

Go to next step

Yes 

Repair or 
replace wire 
harness 

4 

Check the connection between the pin at control 
terminal of engine fault indicating lamp and Pin 26 
of ECU to see if open, short circuit to power/ground 
occurs. 

No 

Diagnosis 
Instruction 

 

34

 

Maintenance Manual for Chery·Windcloud          

Marelli EFI System 

 

6. Diagnostic Steps for Various Engine Failures 

Preliminary inspection shall be carried out before proceeding with diagnostic steps for any 
engine failure: 
(1). Make sure ECU and fault indicating lamp are working normally. 
(2). Check with scanner to make sure that there is no failure information recorded. 
(3). Check warming-up idling data of ECU with scanner to make sure that each value is 

within normal range. 

(4). Confirm the existence of failure complained by vehicle owner and locate the specific 
failure. 
Then appearance inspection: 
 Check ground point of wire harness to see if it is clean and firm. 
 Check vacuum pipe to see if it is properly connected, or if it is broken or twisted. 
 Check pipelines to see if blockage occurs. 
 Check intake pipe to see if it is squashed or damaged. 
 Check the sealing surface between throttle body and intake manifold to see if it is in good 

condition. 

 Check high voltage wire of ignition system to see if it is properly laid out with no breakage 

or aging. 

 Check connections to see if they are properly made; check contacts to see if they are loosed 

or poorly connected. 

Warning: Special attention must be paid to ground points (accumulator, ECU and 
gauges, etc.) on motor vehicles. If any of these points is imporperly grounded, some 
troublesome problems will occur. Sometimes these points are missed in inspection 
because they look like steady without looseness; however some ground points may be 
covered by a layer of paint coated during painting of the motor vehicles, which hinders 
the connection of ground wires. Therefore, in case of troublesome problems, first pull 
out ground wires, grind ground points and then reconnect wires. 
 
 
 

 

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