Chery A11. Manual — part 183

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

2). Engine rotates but fails to start when starting

Step Operation

Result

Solution

Yes

Eliminate failure
displayed

1

Turn ignition switch to “ON”, and check with scanner
to see if there is any failure information recorded.

No

Go to next step

Yes

Go to Step 8

2

Unplug cylinder wire and connect spark plug to make
spark plug electrode 5-10mm away from engine
body. Rotate engine with starting motor and check to
see if there is blue or white high voltage spark.

No

Go to next step

Yes

Go to next step

3

Check resistance value of high voltage wire to see if
it is normal.

No

Repair or replace
high voltage wire

Yes

Replace

4

Check high voltage wire and spark plug of each
cylinder to see if they are damaged.

No

Go to next step

Yes

Replace

5

Check cycles of cylinder-detection in distributor to
see if it is loosened or damaged.

No

Go to next step

Yes

Go to next step

6

Check ignition coil to see if it is in normal condition.

No

Replace

Yes

Go to next step

7

Check socket connector of camshaft to see if it is
properly connected.

No

Connect it

Yes

Go to next step

8

Turn ignition switch to “ON” and check fuel pump
relay and fuel pump to see if they work normally.

No

Check and repair
fuel pump circuit

Yes

Go to next step

9

Connect fuel pressure gauge valve. Strap Pin 30 and
Pin 87 of fuel pump relay, start fuel pump and check
fuel pressure to see if it is around 350kPa.

No

Go to Step 13

Yes

Go to Step 12

10

Pull out fuel distributing pipe and injector together,
and unplug injector connectors from wire harness one
by one. Supply 12V voltage to injector directly from
accumulator and check if injector works.

No

Go to next step

Yes

Go to next step

11

Clean injector and recheck to see if it works.

No

Replace injector

Yes

Replace fuel

12

Check fuel to see if it is deteriorated or contains
water.

No

Go to Step 18

Yes

Go to next step

13

Check fuel pressure to see if it is lower than 350kPa.

No

Go to Step 17

Yes

Go to next step

14

Shut fuel gauge valve, turn on ignition switch once
again to restart fuel pump. Check to see if fuel
pressure is established.

No

Go to Step 16

15

Turn on fuel gauge valve,

clamp the fuel return pipe

with fuel return interceptor to stop fuel returning.

Yes

Replace fuel
pressure regulator

40

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

with fuel return interceptor to stop fuel returning.
Check to see if fuel pressure occurs quickly.

No

Repair or replace
injector or fuel
pipe

Yes

Repair or replace
fuel inlet pipe

16

Check fuel inlet pipe to see if leakage or blockage
occurs.

No

Replace fuel
pump

Yes

Repair or replace
fuel return pipe

17

Check fuel return pipe to see if it is blocked up or
bent.

No

Replace fuel
pressure regulator

Yes

Go to next step

18

Connect a commutator between ECU and wire
harness and then check Pin 44, 45, 63, 12 and 13 of
ECU to see if there is voltage on them. Check the
anode power wire connecting these pins and the
grounding wire connecting Pin 3, 51, 53, 61 and 80 of
ECU to see the connections are proper.

No

Repair or replace
wire harness

Yes

Repair

19

Check air intake system parts to see if leakage occurs.

No

Go to next step

Yes

Repair or replace

20

Check intake manifold absolute pressre sensor and
temperature sensor to see if they are blocked up.

No

Go to next step

Yes

Go to next step

21

Check coolant temperature sensor to see if it works
properly.

No

Repair or replace

Yes

Eliminate
mechanical error

22

Check to see if starting failure is caused by
mechanical errors, such as excessive clearance
between piston and cylinder, or air leakage in
cylinder, etc.

No

Replace ECU

41

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

3). Vehicle warm starting is difficult

Step Operation

Result

Solution

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

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 9

Yes

Go to next step

3

Disconnect fuel pipe and shut down ignition
switch to see if the pressure of fuel system can
maintain between 250-300kPa an hour later.

No

Repair fuel system
leakage

Yes Replace fuel

pressure regulator

4

Connect fuel pipe and intercept fuel return pipe
with the interceptor, and at the same time, shut
down fuel pressure gauge valve. Also shut down
ignition switch to see if the pressure of fuel system
can maintain between 250-300kPa an hour later.

No

Go to next step

Yes Replace

injector

and fuel pipe

5

Check if fuel leakage occurs in injector and fuel
pipe.

No

Go to next step

Yes Check

coolant

temperature and
lines

6

Unplug water temperature sensor connector and
make engine start. Check to see if the starting is
successful.

No

Go to next step

Yes

Go to next step

7

Connect commutator between ECU and wire
harness. Check if there are voltages on ECU’s
44#, 45#, 63#, 12# and 13# pins, and then check if
the anode power line connecting the aforesaid
ECU pins and ground wire connecting ECU’s 3#,
51#, 53#, 61# and 80# pins are in good condition.

No Repair

or

replace

wire harness

Yes Finish

8

Replace fuel, and carry out warm starting again to
see if successful.

No Replace

ECU

Yes

Go to next step

9

Check if fuel pipe is blocked up or bent, and if
fuel pump pressure regulating valve is working in
good order.

No

Repair or replace

Yes

Go to next step

10

Check with multimeter to see if there is
accumulator voltage on both terminals of socket
connector of fuel pump.

No Repair

or

replace

fuel pump relay and
leads

Yes

Go to next step

11

Check with multimeter to see if the resistance
valve of fuel pump is correct.

No

Replace fuel pump

Yes

Replace fuel pump

12

Check if fuel pump is stuck.

No Replace

ECU

42

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

4). Rotating speed is normal, but starting is difficult all along

Step Operation

Result

Solution

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

After successful starting, check to see if intake
manifold pressure is between 35-65kPa when
idling.

No Eliminate

intake

system air leakage
failure

4

Slightly step down on throttle to see if the
starting is easy.

Yes Replace/check

throttle and idle
speed passage

Yes

Go to next step

5

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 9

Yes

Go to step 8

6

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

7

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

No Replace

injector

Yes Replace

fuel

8

Replace fuel and check if fuel is deteriorated or
contains water.

No

Go to step 14

Yes

Go to next step

9

Check if fuel pressure is lower than 350kPa

No

Go to step 13

Yes

Go to next step

10

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 12

Yes Replace

fuel

pressure regulator

11

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

12

Check if leakage or clogging occurs in fuel inlet
pipe.

No

Replace fuel pump

Yes Repair

or

replace

fuel return pipe

13

Check if fuel return pipe is blocked up or bent.

No Replace

fuel

pressure regulator

Yes

Go to next step

14

Pull out the idle speed actuator connector on
wire harness before engine coolant temperature
reaches 35℃ to see if engine speed declines.

No Repair

or

replace

idle speed actuator

Yes

Go to next step

15

Set ignition switch in “ON”. Check if the
voltages of the following pins of ECU are in
good order: if the accumulator voltage is about
12V on 13#, while 0 on 80# and 61#.

No

Check wire harness
and socket
connector

16

Make engine run at idle speed, and check to see Yes

Go to next step

43