Chery A11. Manual — part 187
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
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 32#, 33# 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
56
Maintenance Manual for Chery · Windcloud
M7.9.7 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 32#, 33# 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
57
Maintenance Manual for Chery · Windcloud
M7.9.7 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 35-65Kpa.
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
58
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
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
Go to next step
16
Check if data of intake manifold absolute
pressure and intake air temperature sensor is
normal.
No Replace
sensor
Yes
Go to next step
17
Check if spark plug, high voltage line and
ignition coil are in good condition.
No
Replace or adjust
Yes Check
air
conditioning system
18
Check if caused by air conditioning system.
No Replace
ECU
15). Air conditioning system failure
Yes
Go to next step
1
Check if there is enough refrigerant in system,
and if air conditioning belt, air conditioning
clutch and pressure switch are working in good
condition.
No Troubleshooting
Yes Eliminate
failure
displayed
2
Make engine run at idle speed, and switch on air
conditioning switch. Check with scanner to see
if failure of air-conditioning thermal resistor
occurs.
No
Go to next step
Yes
Go to next step
3
Turn on air conditioning switch, connect
commutator between ECU and wire harness,
and then measure to see if there is signal input
on air conditioning switch, air conditioning
pressure of ECU.
No
Check wire harness
Yes
Replace bulb or
repair wire harness
4
In case low-level control is adopted, check if
air-conditionor still works when it is OFF.
No
Go to next step
Yes
Repair
air
conditioning relay
and wire harness
5
Check if there is low-level output at ground
terminal of pull-up coil of ECU air conditioning
relay.
No Replace
ECU
59
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