Chery S11 / Chery QQ. Manual - part 230

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

In continues zero test, 

requency that pulse 

integral value is over 
gate value of voltage 
exceeds the set value. 

the f

 
Fault frequency 
does not exceed 
set value 

In 

th

continues integrator 

original voltage testing, 
the frequency that 
integrator original 
voltage is below the 
maximum value exceeds 

e set value. 

Fault frequency 
does not exceed 
set value 

 

 

Engine RPM 
is below 
5000, Engine 
temp is equal 
or below gate 
value for 
actuating 
knock control, 
or mass flow 
for each turn 
is equal or 
below gate 
value for 
knock control 

In continues integrator 
original voltage testing, 
the frequency that 
integrator original 
voltage is over the 
maximum value exceeds 
the set value. 

each turn) is over gate value 
for knock control, and engine 
temp is over gate value for 
actuating knock control, the 
ignition will put off a safety 
angle for knock control. 

Fault frequency 
does not exceed 
set value 

2 

No 
malfunction 

  

11 

 

  A/C evaporator temp is 
below low trustable limit

3 
 
 
 

A/C 
evaporator 
temp is not 
trustable 

A/C evaporator temp is 
over up trustable limit 

A/C evaporator temp= A/C 
evaporator temp substitue 
value 

13 A/C 

evaporator 

temp resumes 
between the up 
and lower limit 

4 

 
TPS signal is 

TPS angle is over the 
upper limit 

TPS angle =TPS angle 
substitute val- 

14 angle 

resumes 

between the up 

 

17

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 

not trustable 

TPS angle is below 
upper limit 

ue Setting TPS mal- 
function position. 
 Only in shuting off fuel it 
will be dealed with idle. 
Partial load and fully load 
can be identified only. If 
actual mass flow is below the 
gate value at idle substitue 
condition during TPS is in 
malfunction, and it is in shut 
ing off fuel, idle emergrmcy 
running could be carried. If 
actual mass flow is over the 
sum of gate value and 
allowed defferential value, 
idle emergrmcy running 
could not be carried. 
If load signal( mass flow for 
each turn) is over the load 
gate value in full load 
substitute condition during 
TPS is in malfunction, and 
the RPM is over the RPM 
gate value in full load 
substitute condition during 
TPS is in malfunction, 
engine will run at full load 
condition. If one of 
conditions can not be 
satisfied, it does not run at 
full load condition. 
 
Now close the trigger for 
transition working condition 
initial compensation function 
related with TPS. 
Don’t permit to open the 
buffer function for idle 
control and the self-study 
function of idle air. 
Set idle controller integrator 
to zero. 
 

 

between the up 
and lower 
limits. 

5 

KS 

When  RPM  exceeds  the  Set malfunction signal record  15 

Fault  frequency 

 

18

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

malfunction 

gate value to activate 
diagnose KS 
malfunction, the 
reference voltage to 
diagnose KS 
malfunction will be 
below its gate value. 

for KS, harness and 
hardware: Iignition advanced 
angel is reduced to a safety 
value. If load signal( mass 
flow for each turn) is over 
gate value for knock control, 
and engine temp is over gate 
value for actuating knock 
control, the ignition will put 
off a safety angle for knock 
control. Full load ignition 
will be put off same safety 
angle for knock control. 
 

does not exceed 
set value 

MAP pressure is over 
the trustable upper limit 

6 

MAP signal is 
not trustable 

In non-start working 
condition or engine 
RPM is below the gate 
value to diagnose MAP 
malfunction, MAP 
pressure is below the 
trustable upper limit 

Set malfunction information 
mark for main load sensor. 
Take the laod information 
(mass flow for each turn) as 
load signal input according 
to TPS angle and RPM: 
Select ignition advanced 
angel: 
If TPS is fault, set two fixed 
emergency running signal 
according to below or over 
the gate value for RPM. 
Close O2S closed-loop 
control self-study ( the data 
at moment is effective). 
Close idle closed-loop 
control self-study ( the data 
at moment is effective).   
 

16 MAP 

pressure 

resumes 
between the up 
and lower 
limits. 

7 

O2S signal is 
not trustable 

O2S signal keeps over 
the upper limit for over 
the specified time (short 
to battery voltage). 
 

Close O2S closed-loop 
control 

17  

 

19

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

Under the condition of 
satisfying O2S normal 
operation, the signal 
voltage keeps over the 
specified time between 
gate values for rich mix 
or lean mix ( open 
circuit) 

 
Close O2S closed-loop 
control 

O2S signal keeps below 
the lower limit for over 
the specified time (short 
to battery voltage). 

Close self-study pre-control 
for O2S closed-loop control, 
canister cleaning and O2S 
closed-loop control: 
Make O2S closed-loop 
control correct coefficient 
=1.4s. 

 

 

 

 

O2S signal voltage is 
below lower limit, and 
inject time for O2S 
closed-loop control 
correct coefficient keeps 
over 1.4s (short to 
ground) 

Close O2S closed-loop 
control, and make the upper 
limit for injecting 
closed-loop control correct 
coefficient equal to old one. 

The injecting 
closed-loop control 
correct coefficient equals 
to the upper limit for 
over 10s. 

8  

O2S injecting 
closed-loop 
control 
correct 
coefficient  
is not 
trustable 

The injecting 
closed-loop control 
correct coefficient equals 
to the lower limit for 
over 10s. 

Non 31 

 
The closed-loop 
out voltage is in 
the scale of 
adjusting 

9 Over 

maximum 
RPM 

Over maximum 
identifying malfunction 
RPM 

Non 33 

 
Not over RPM 

ROM/EPROM 
malfunction 

 
Troubleshooting

RAM malfunction 

Troubleshooting

10  

ECU 
malfunction 

Knock control data 
processing circuit ( zero 
test, pulse test) 
malfunction 

Set malfunction information 
record for KS, harness or 
hardware: 
Reuce ignition advanced 
angle to a safety degree. 
Other conventional function 
is still possible 
 

34 

 
Troubleshooting

 

20