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.

35