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