Chery A11. Manual — part 162

Maintenance Manual for Chery·Windcloud

Marelli EFI System

1). Engine dose not rotate or rotates slowly when starting

Step Operation

Result

Solution

Yes

Go to next step

1

Check the voltage between two terminals of
accumulator with a multimeter to see if it is around
10-12.5V.

No

Repair or replace
accumulator

Yes

Go to next step

2

Turn ignition switch to “ON”. Check the voltage on
terminal of ignition switch connected to anode of
accumulator with a multimeter to see if it is around
10-12.5V.

No

Repair terminal
or change wire

Yes

Go to next step

3

Keep iginition switch at “ON”, check the voltage on
terminal to ignition switch connected to starting
motor push-pull coil with a multimeter to see if it is
higher than 8V.

No

Repair or replace
ignition switch

Yes

Repair or replace
starting motor

4

Check starting motor with a multimeter to see if open
or short circuit occurs.

No

Go to next step

Yes

Eliminate failure

5

Check engine to see if it is stuck due to poor
lubrication (turn crankshaft with tool at belt pulley
to see if it rotates).

No

Go to next step

Yes

Replace lubricant
or oil with proper
models

6

In case of cold weather, check engine lubricant and
gearbox oil to see if they cause excessive resistance to
starting motor (check engine oil viscocity to see if it
is normal).

No

Check other parts

36

Maintenance Manual for Chery·Windcloud

Marelli 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 8-10mm away from engine
body. Rotate engine with starting motor and check to
see if there is blue or white high voltage spark
(notable spark does not prove that he spark plug is in
good condition, for the resistance value of the
atmosphere differs from that of compressed air in
cylinder).

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 the connection between ignition coil and ECU
wire harness to see if it is 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 crankshaft position sensor
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

14

Shut fuel gauge valve, turn on ignition switch once

Yes

Go to next step

37

Maintenance Manual for Chery·Windcloud

Marelli EFI System

again to restart fuel pump. Check to see if fuel
pressure is established.

No

Go to Step 16

Yes

Replace fuel
pressure regulator

15

Turn on fuel gauge valve,

clamp the fuel return pipe

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 15, 47 and 29 of ECU to
see if there is voltage on them. Check the anode
power wire connecting these pins and the grounding
wire connecting Pin 27 and 28 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. (cylinder pressure is fairly low in these
cases).

No

Replace ECU

38

Maintenance Manual for Chery·Windcloud

Marelli 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
or fuel pump

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
15#, 29# and 47# pins, and then check if the anode
power line connecting the aforesaid ECU pins and
ground wire connecting ECU’s 27#, 28# 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

39