Chery A11. Manual — part 166

Maintenance Manual for Chery·Windcloud

Marelli EFI System

12). Low rotating speed or engine flameout during acceleration

Yes Eliminate

failure

displayed

1

Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.

No

Go to next step

Yes

Go to next step

2

Check if air filter is smooth.

No Replace
Yes

Go to next step

3

Make engine run at idle speed, and check to see
if rotating speed is normal when idling.

No

Refer to entry of
idle speed failure
for repair

Yes

Go to next step

4

Make engine run at idle speed, and check to see
if intake pressure is between 35-55kPa.

No Overhaul
Yes

Go to next step

5

Make engine run at idle speed, and check to see
if ignition advance angle is normal after coolant
temperature reaches normal value.

No Adjust

ignition

advance angle

Yes

Go to next step

6

Connect fuel pressure gauge valve. Strap the
30# and 87# pins of fuel pump relay to make
fuel pump work, and then check if fuel pressure
is at about 350kPa.

No

Go to step 10

Yes

Go to step 9

7

Provide 12V voltage directly from accumulator
to injector with special connector, and check if
injector is working in good order.

No

Go to next step

Yes

Go to next step

8

Recheck injector to see if it is working in good
order after cleaning.

No Replace

injector

Yes Replace

fuel

9

Check if fuel is deteriorated or contains water.

No

Go to step 15

Yes

Go to next step

10

Check if fuel pressure is lower than 250kPa

No

Go to step 14

Yes

Go to next step

11

Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once
more, and check if fuel pressure is established.

No

Go to step 13

Yes Replace

fuel

pressure regulator

12

Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.

No Repair/

replace

injector or fuel
pipe

Yes

Repair or replace
fuel inlet pipe

13

Check if leakage or clogging occurs in fuel inlet
pipe

No

Replace fuel pump

14

Check if fuel return pipe is blocked up or bent.

Yes

Repair or replace
fuel return pipe

52

Maintenance Manual for Chery·Windcloud

Marelli EFI System

No

Replace

fuel

pressure regulator

Yes

Go to next step

15

Set ignition switch in “ON”. Connect
commutator between ECU and wire harness to
check the voltages of output signal terminal,
ground terminal and 76#, 60# pins (served as
4.5-5V sensor power) of ECU throttle position
sensor to see if they are in good order.

No

Repair or replace
wire harness

Yes Replace

ECU

16

Check if ignition coil, high voltage line and
spark plug are in good condition.

No Repair

relevant

parts

53

Maintenance Manual for Chery·Windcloud

Marelli EFI System

13). Slow response when accelerating

Yes Eliminate

failure

displayed

1

Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.

No

Go to next step

Yes

Go to next step

2

Shut down the engine and check if air filter is
smooth.

No Replace

Yes

Go to next step

3

Make engine run at idle speed, and check to see
if rotating speed is normal when idling.

No

Refer to entry of idle
speed failure for
repair

Yes

Go to next step

4

Make engine run at idle speed, and check to see
if intake pressure is between 35-65kPa

No Overhaul
Yes

Go to next step

5

Switch on ignition switch and connect
commutator between ECU and wire harness to
check the voltages of output signal terminal,
ground terminal and 76#, 60# pins (served as
4.5-5V sensor power) of ECU throttle position
sensor to see if they are in good order.

No

Repair or replace
wire harness

Yes

Go to next step

6

Make engine run at idle speed, and check to see
if ignition advance angle is normal after coolant
temperature reaches normal value.

No Check

others

Yes

Go to next step

7

Connect fuel pressure gauge valve. Strap the
30# and 87# pins of fuel pump relay to make
fuel pump work, and then check if fuel pressure
is at about 350kPa.

No

Go to step 11

Yes

Go to step 10

8

Provide 12V voltage directly from accumulator
to injector with special connector, and check if
injector is working in good order.

No

Go to next step

Yes

Go to next step

9

Recheck injector to see if it is working in good
order after cleaning.

No Replace

injector

Yes Replace

fuel

10

Check if fuel is deteriorated or contains water.

No

Go to step 16

Yes

Go to next step

11

Check if fuel pressure is lower than 350kPa

No

Go to step 15

Yes

Go to next step

12

Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once
more, and check if fuel pressure is established.

No

Go to step 14

Yes Replace

pressure

regulator

13

Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.

No Repair/

replace

injector or fuel pipe

Yes

Repair or replace fuel
inlet pipe

14

Check if leakage or clogging occurs in fuel inlet
pipe

No

Replace fuel pump

Yes

Repair or replace fuel
return pipe

15

Check if fuel return pipe is blocked up or bent.

No Replace

pressure

regulator

Yes

Replace or clean

16

Check exhaust system and three-way catalytic
converter to see if they are blocked up.

No Replace

ECU

54

Maintenance Manual for Chery·Windcloud

Marelli EFI System

14). Poor performance and disability occur during acceleration

Yes Repair

1

Check if there exists failure of clutch slipping,
low tire pressure, braking drag, incorrect tire
size, four-wheel alignment error and etc.

No

Go to next step

Yes

Go to next step

2

Check if throttle can be fully opened.

No Replace

or

repair

throttle

Yes Elimilate

failure

displayed

3

Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.

No

Go to next step

Yes

Go to next step

4

Make engine run at idle speed, and check to see
if ignition advance angle is normal after coolant
temperature reaches normal value.

No Check

others

Yes

Go to next step

5

Set ignition switch in “ON”. Connect
commutator between ECU and wire harness,
and check respectively the voltages of pins
concerning ECU’s manifold absolute pressure
sensor, throttle position sensor, intake air
temperature sensor and coolant temperature
sensor, ECU oxygen ground terminal and signal
output terminal, ECU sensor signal ground
terminal as well as ECU32, 33# pins as 4.5- 5V
sensor power to see if they are in good order.

No

Repair or replace
wire harness

Yes

Go to next step

6

Make engine run at idle speed, and check if
intake pressure is 35-55Kpa.

No

Overhaul

Yes

Go to next step

7

Connect fuel pressure gauge valve. Strap the
30# and 87# pins of fuel pump relay to make
fuel pump work, and then check if fuel pressure
is at about 350kPa.

No

Go to step 11

Yes

Go to step 10

8

Provide 12V voltage directly from accumulator
to injector with special connector, and check if
injector is working in good order.

No

Go to next step

Yes

Go to next step

9

Recheck injector to see if it is working in good
order after cleaning.

No Replace

injector

Yes Replace

fuel

10

Check if fuel is deteriorated or contains water.

No

Go to step 16

Yes

Go to next step

11

Check if fuel pressure is lower than 350kPa

No

Go to step 15

Yes

Go to next step

12

Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once
more, and check if fuel pressure is established.

No

Go to step 14

13

Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel

Yes Replace

pressure

regulator

55