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