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Chery T11 Service Manual Electric Injection System
Chapter
Electric Fuel Injection System
1
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Section Operating Principle of Key Components
1. Pressure and Intake emperature Sensor !E"P#
" $%electronic fuel injection system employs
the velocity-density-air metrological method to
detect the air capacity that flow into the engine,
and further accurately control the power output
of the engine !t the same time, this system
applies the Intake Pressure Cylinder
&etection technology The inta"e pressure
sensor is mounted near the air inta"e of #o 1
cylinder$s inta"e manifold There is an
instantaneous pressure drop in the position of
sensor on the moment when the air inta"e opens
The value of pressure drop is appro%imate
1&pa The EC' can detect this instantaneous
pressure drop, receive this signal from the
sensor, and then determine the signal of
compression upper dead center after the signal is
analy(ed and processed )y software
The Intake Pressure Sensor$s internal pressure
mem)rane connects with the magnetic core
placed in a coil The mem)rane will movetogether with the iron core when the inta"e air
pressure in the inta"e pipe changes In this case,
the output voltage of the sensor will also
change The EC' can convert the output voltage
of sensor to the inta"e capacity of the engine
*ased on this signal, another signals will )e
referred to control the fuel injection volume of
the engine
The intake temperature sensor element is aresistor with negative temperature coefficient
+#TC, the resistance value of which will
decrease as the increase of the inta"e
temperature The EC' of engine can monitor
the change of inta"e temperature through its
internal comparison circuit
Installation' Installed on the #o 1 cylinder$s
inta"e manifold, and the cylinders are detected
)ased on the instantaneous pressure drop whenthe air inta"e opens
!)solute pressureinta"e temperature sensor for
inta"e manifold
Circuit .iagram of the a)solute pressureinta"e
temperature sensor for inta"e manifold
/
T11 Inta"e pressure
temperature sensor
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rou(leshooting'
1 Mainly e%amine the short or open circuit
)etween the four wires on sensor and the
EC'
/ E%amine the clog of the sensor$s detection
hole
0 E%amine the short or open circuit and the
grounding among the harnesses of sensor
E%amine the sensor$s impact received to
cause the sensor failure
)# &etection pressure range' 1%kPa to 11%
kPa
rou(le &iagnosis'
1 Short circuit of the sensor$s wire +shorted to
earth, or shorted to supply2
/ 3pen circuit of the sensor$s wire2
0 The inta"e pressure detected )y sensor is
greater than its upper limit2
The inta"e pressure detected )y sensor is
less than its upper limit2
Pin'
1 #o1 +! for the signal from inta"e pressure
sensor +to EC' /42
/ #o/ +* for the standard 56 power supply
+to EC' 42
0 #o0 +C for the signal from the inta"e
temperature sensor +to EC' /742
#o +. for the ground wire of sensor +to
EC' /14
Operating temperature range' *+%
to 1$)
Operating ,oltage' ).%,
%.1,
0
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$. hrottle Position Sensor !PS#
-pplication' "$% T8S +Throttle 8osition
sensor is availa)le to provide the EC' with the
information a)out the throttle$s opening angle
and angular /elocity and the idle position of
the engine *ased on the information, EC' can
o)tain the engine$s information on load and
operating condition +such as startup, idle,
reverse towing, part load and full load as well
as acceleration and deceleration This sensor is a
three-wire sensor !nd the EC' detects the
opening of throttle through the monitoring on
the voltage change
8rofile of a throttle position sensor
Structure and Principle'This sensor is with
the slip resistance structure +ie the linear
varia)le resistance structure The EC'
monitors the voltage among the signal output
terminals and gets the opening signal of the
throttle through the circuits comparison
conducted inside the computer In the EC', the
voltage signal is not received directly )ut rather
the input-to-output signal ratio is detected,
which can avoid the signal fluctuation generated
due to the voltage fluctuation
rou(le &iagnosis'
The signal from throttle position sensor is
greater than the measuring range2
The signal from throttle position sensor is less
than the measuring range2
Short circuit of the throttle position sensor
signal connection2
3pen circuit of the throttle position sensor
signal connection2
0-2I23' It is generally prohi)ited to
disassem)le the throttle position sensor which
has adjusted to its optimal position )efore it
T11 Throttle 8osition Sensor
Circuit diagram of the throttle position sensor
Pin'
1 #o1 +! for the standard 56 power supply
+to EC' /942
/ #o/ +* for the ground wire of sensor +to
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leaves factory
Installation'The allowa)le tightening tor:ue of
the tightening screw is 15 #m to /5 #m
rou(leshooting'
1 Mainly e%amine the short or open circuit
)etween the three wires on sensor and the
EC'
/ E%amine the short or open circuit and the
grounding among the harnesses of sensor
0 E%amine the jump )etween the sensor signal
terminal and the ground wire, which is
detected with the universal meter
E%amine the sensor$s resistance which is
evidently greater than the standard value,
the season of which may )e that the interior
of sensor is dirty
EC' 54
0 #o0 +C for the signal from the sensor +to
EC' /42
Operating ,oltage' )4%.1 ,
Opening ange' 56 to 786
esistance of Sensor' 8 k9 to 1$ k9
Output signal during the close of throttle'
%.:1$ to %.);; ,
Output signal during the full open of throttle'
+.1) to +.:) ,
5
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8. Coolant emperature Sensor !
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The three >iresof the sensor are respectively;
a The 56 standard power supply wire2
) The sensor signal wire +for EC'2
c The sensor signal wire +for
instruments
rou(leshooting'
1 Mainly e%amine the short or open circuit
)etween the three wires on sensor and the
EC' or instruments
/ E%amine the short or open circuit and the
grounding among the harnesses of sensor
0 E%amine the )ad wire earth or earth, which
easily cause the over-high temperatureindicated on the water temperature gauge of
the engine
Characteristic Parameters !Standard ,alue#'
*1%
1:1$%
%
7877
$%
8)11
:%
:51
7%
$+1
Operating ,oltage' ), &C
Opening emperature ange' *+%
to 18)
+. Knock Sensor !KS= K2K#
-pplication' This sensor is used to provide the
EC' with the "noc" information of the engine to
conduct the "noc" control
Structure and Principle'The "noc" sensor is a
"ind of vi)ration acceleration sensor mounted on
the cylinder )ody of an engine It is generally
installed )etween the #o / cylinder and the #o 0
cylinder, which is in favor of the "noc" )alance of
the engine The EC' utili(es the vi)ration
fre:uency signal output from the "noc" sensor to
determine the "noc" of the engine through the
wave filtering inside the EC' ?hen the "noc"
signal is detected, the EC' will gradually reducethe "noc" till there is no "noc", and then gradually
resume the "noc" till up to the upper limit of
"noc" Aepeat this procedure a)ove
8rofile of a "noc" sensor with ca)le
7
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rou(le &iagnosis' The EC' monitors the
"noc" sensor, power amplification circuit and
testing circuit The fault flag of the "noc"
sensor will )e set if one of the following
conditions occurs;
1 The "noc" sensor fails2
/ The "noc" control data processing circuit
fails2
0 There are some insincere cylinder detection
signals2
The sensor wire fails
!fter the fault flag of the "noc" sensor is set,
the closed-loop control for "noc"ing closes and
then the ignition advance angle stored in the
EC' is identified as a safety angle )y the
software program The fault flag resets when
the error fre:uency drops down to the setting
value )elow
Installation
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). O@ygen Sensor !O$S#-pplication' This sensor is used to provide the
information a)out weather the o%ygen is
superfluous after the fuel injected into the
engine cylinder fully com)ust together with air
inta"e *ased on these information, the EC'
can conduct the fuel :uantitative closed-loop
control to convert and purify three main to%ic
components, ie DC, C3 and #o% which e%ist
in the engine e%haust, with the help of three-
way catalytic converter
Structure and Principle'The sensing element
of the o%ygen sensor is a "ind of ceramic tu)e
with small holes, which the outside of tu)e wall
is surrounded )y the engine e%haust while the
inside is full of air *ased on the o%ygen
concentration difference )etween the inside and
the outside, the sensor indirectly figure out the
pulse width of the fuel injection, transmit the
width to the EC', and then the EC' controls
the fuel injection again !t the same time, The
output data from the rear o%ygen sensor are
detected, and, in the EC', the data from thefront and rear o%ygen sensors are compared to
monitor the operation of three-way catalytic
converter
The operating voltage of the o%ygen sensor
fluctuates at the range of 91 to 9B 6, and
changes 5 to times every 19 seconds If the
change fre:uency is less than this specified
fre:uency, it indicates that the sensor is aged
which needs to replace This sensor is difficultto repair
rou(le &iagnosis'
The EC' detects the o%ygen sensor, wires and
the power amplification circuit and testing
circuit inside EC' The fault flag of o%ygen
sensor will )e set if one of the following
conditions occurs;
8rofile of a o%ygen sensor
T11 3%ygen Sensor
Circuit diagram of front o%ygen sensor
!ll front o%ygen sensors have the ca)les The
other end of a ca)le is the electrical connectionThere is a layer of as)estos fireproof covering
around the outside of the sensor
B
Main Aelay
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1 There is the insincere )attery voltage2
/ There are some insincere inta"e manifold
a)solute pressure signals2
0 There are some insincere engine coolant
temperature signals2
The fuel injector driving level fails
!fter the fault flag of the o%ygen sensor is set, the
fuel :uantitative closed-loop control closes, and
then the )asic injection time stored in the EC' is
applied to determine the fuel injection :uantity
Installation
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ear O@ygen Sensor !O$S#
The structure and detection of the rear o%ygen
sensor are similar to the front o%ygen sensor,
)ut the purpose that a vehicle e:uips with the
frontrear o%ygen sensor is considera)ly
different
Purpose'
Front O@ygen Sensoris mainly used to detect
the o%ygen content of the e%haust and further
determine the fuel injection :uantity The
sensor converts the o%ygen content of e%haust
after com)ustion into the electric signal, and
then transmits the signal to the EC' The EC'
utili(es these signals to control the pulse width
of fuel injection, regulate the air-fuel ratio, and
indirectly control the e%haust emission of the
engine
ear O@ygen Sensor is mainly used to detect
the o%ygen content of e%haust after thecompletion of three-way catalytic conversion
The sensor converts this signal into the point
signal, and transmits it to the EC' The EC'
compares the signals from the front and rear
o%ygen sensors and then determines the
operation of the three-way catalytic converter
The trou(le diagnosis= trou(leshooting=
signal detectionand other characteristics of the
rear o%ygen sensor are the same as the front
o%ygen sensor
Internal structural diagram of a o%ygen sensor
T11 3%ygen Sensor
Circuit diagram of rear o%ygen sensor
-ny connection has four pins'
1 #o 1 +! for the o%ygen sensor signal low
level +to EC' @42
/ #o / +* for the o%ygen sensor signal high
level +to EC' 042
0 #o 0 +C for the power supply of the main
relay2
#o +. for the sensor heater wire control
+to EC' @4
11
Main Aelay
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:. Electronic Control nit !EC#
-pplication'
!n EC' is an electric engine control center )ased
on the microprocessor, with the sensor signal input
interface and actuator drive circuit It receives and
processes the engine status signals from any
sensor, and transmits the control signal to the
actuators to ena)le the engine to operate in
accordance with the preset procedure It ma"es the
engine in the optimal condition and ensures the
)etter dynamics, fuel-effective and emission
2ormal operating /oltage' 7 to 1:,
O/er/oltage protection' A$+,B*1$, :% s
Structure' with the shielded casing and 8C*
+8rinted Circuit *loc" There are a majority of
electronic control units in a circuit )oard, which is
applica)le for the control of electronic fuel
injection system
Installation'Mounted under the water chute of the
front windscreen with the help of a support andvehicle computer +EC' 8ay more attention to
waterproof
Operating temperature' *+%
to 1%)
8rofile of a EC'
Functions'
Multipoint se:uential fuel injection system2
rouping ignition system2
Idle control2
!utomatic "noc" closed-loop control2
8rovide sensor with the power supply;
56199m!2
Fclosed-loop control, with the self-adapting2
.ual o%ygen sensors2Emission canister control2
!C EC' control2
Engine failure lamp2
Engine speed signal output2
Trou)le self-diagnosis, with the flash code
function2
Aeceive the engine load signal
rou(leshooting' EC' is an electronic
control unit .ue to its lower fault rate, in
general, it is not recommended to adapt the
EC' replacement to solve all pro)lems
Carefully e%amine the faults of the periphery
circuits, sensors and other components,
confirm that there is no fault in the periphery
components, and then it is considered to
replace the EC'
1/
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5. Electric Fuel Pump !P"P#
-pplication'?ith the specified fuel pressure and
flow rate, this pump transmits the fuel from the
fuel tan" to the engine$s main fuel supply pipe, and
"eeps the sta)le fuel pressure +)y the fuel pressure
regulator
Structure and Principle'The electric fuel pump
consists of the .C motor, vane pump, end cover
which integrates with the chec" valve,
decompression valve and EMI components and
other elements The pump is installed coa%ially
together with the motor, and sealed in the same
casing The ma%imum pressure of the electric fuel
pump outlet depends on the decompression valve,
the range of which is +)% kPa to :)% kPa
Dowever, the pressure of the whole fuel system
depends on the fuel pressure regulator, and, for the
" $% electronic fuel injection system= the
pressure is generally 8)% kPa.
C-IO2'In case that the fuel tan" of a vehicle
is short or lac" of fuel for a long time, the fuel
pump will )e difficult to o)tain the full lu)rication,
which ma"es the fuel pump sintered Especially,
for the engine ta"ing C# and G8 as its fuel, the
fuel tan" of this "ind of engine is generally in the
state of no fuelor lack fuelfor a long time, and its
fuel pump fails to )e fully lu)ricated for a long
time, which result in the damage of fuel pump
The temperature of fuel ma"es more influence on
the performance of fuel pump ?hen the fuel
pump operates at the high temperature for a long
time and the temperature of fuel is greater than the
specified temperature, the fuel pumping pressure
of the fuel pump will drop steeply Thus, if the
engine fails to start during the period of vehicle
warm up, please carefully e%amine and confirm
whether the high temperature operating
performance of the fuel pump is )ad
8rofile of a electric fuel pump
Circuit diagram of electric fuel pump
Pin' The electric fuel pump has two pins
which connect to the fuel pump relay There
are sym)ols HJ and H-H stamped on the fuel
pump casing near these two pins, which
means the connection to the positive and
negative electrode respectively
EC' @4 pin is applied to control the fuel
pump relay
10
Main Supply
.ynamic Aelay
T11 Kuel 8ump Control
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he fuel pump lu(ricating and cooling are
implemented >ith the help of the gasoline in
the fuel tank.
The fuel tan" of this vehicle is a saddle-shaped
tan", with two fuel pump openings
&ecompression pressure' 7%% kPa
Operating /oltage' ; to 1: ,
Fuel pump resistance' 18%
The injection pump in the reserve tan" is used
to pump the fuel return to the main fuel tan"
rou(leshooting' The fuel pump failures are
generally the fuel pressure shortage, non-
pumping and etc .uring the period of
trou)leshooting, e%amine the fuel pressure of
the system is within the specified range, and
also e%amine the lea"age of pipeline
In addition, )oth the positive and the negative
pressure will ma"e influence on the fuel
system
;. Electromagnetic Injector !I2D#-pplication' " $%employs the se:uential fuel
injection technology The se:uential injection
signals are provided )y the inta"e pressure sensor
+TEM8 If the TEM8 is damaged, the mode of
grouping injection is applied to control the fuel
injection in accordance with the ignition se:uence
*ased on the instructions from EC', the fuelinjector injects the fuel within the specified time,
offers engine the fuel and atomi(es them
Structure and Principle' The EC' emits the
electrical pulse to the injector coil, which forms
the magnetic field force ?hen the magnetic field
force rises up enough to con:uer the resultant force
of the return spring pressure, gravity force of
needle valve and frictional force, the needle valve
starts to rise, and the fuel injection process )egins?hen the fuel injection pulse ends, the pressure of
return spring ena)le the needle valve to )e closed
again
8rofile of a electromagnetic injector
T11 Kuel Injector roup
Circuit diagram of electromagnetic fuel
injector
1
Main Aelay
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Installation
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7. Idle -ctuator Stepper "otor !I&E#Function' Control the air flow area of )ypass
channel in the throttle valve, and further control
the air inta"e :uantity of the engine *ased on the
signals from all sensors, the EC' can control the
engine speed within the target speed range which
can )e cali)rated in accordance with the coolant
temperature
Structure and Principle' In fact, a stepper motor
is a micro-motor Since the coil of motor passes
through different directional currents, the motor
will rotate in different direction The rotary shaft of
the motor will drive the threaded spindle
movement and indirectly control the opening of
the valve MT /9' emits the digital s:uare wave
signal to control the ahead-reverse rotation and
further control the stro"e of the stepper motor
rou(le &iagnosis' The EC' can monitor the
short or open circuit of two coils of the idle stepper
motor, and light the engine failure lamp when
these trou)les occur, which means that the engine
switches to the failure mode
It also monitors the short or open circuit )etweenthe four wires of sensor and the EC'
EC' can$t monitor the trou)les generated )y the
mechanical part of the motor
rou(leshooting' E%amine the short or open
circuit of four wires connection )etween the
stepper motor and the EC'
E%amine the jamming of the stepper motor
E%amine the short or open circuit inside the
stepper motor
.isassem)le the stepper motor, power on, and
then e%amine the fle%i)ility of the stepper motor
The car)on deposit and dirty material in the
inta"e system will ma"e an influence on the
operating performance of stepper motor
esistance of motor coil' );.8 to +5.5
Operating /oltage' 5.) to 1:,
8rofile of idle actuator stepper motor
T11 Idle Stepper Motor
Circuit diagram of idle actuator stepper motor
Pin'1 #o 1 +* for idle actuator stepper motor
control +to EC' 0042
/ #o / +! for idle actuator stepper motor
control +to EC' 042
0 #o 0 +. for idle actuator stepper motor
control +to EC' 542
#o +. for idle actuator stepper motor
control +to EC' 5042
1@
Air
Throttle Valve Body
Idle Control Valve
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1%. Ignition Coil !COI#Function'The ignition coil changes the low
voltage passing through primary winding to the
high voltage through the secondary winding,
creates the spar"le with the help of the ignition
plug discharge to ignite the fuel-air mi%ture in
the engine
Structure and Principle'MT /9' adapts the
grouping ignition technology, which, )ased on
this principle that the mutual inductance of
electromagnetic coils can create higher energy,
controls the power on hours and power off time
of the primary coil It applies the high voltage
generated in the secondary coil to )rea" down
the ignition plug clearance, create strong
spar"le and ignite the mi%ture .ue to there are
many ioni(ed airs, lower electrical resistance
during the stro"e of engine e%haust, only lowest
voltage is re:uired to )rea" down the ignition
plug clearance Thus, this system employs the
grouping ignition technology, which can$t waste
the energy and may save cost
rou(le &iagnosis' The EC' doesn$t have the
function to conduct the trou)le diagnosis on the
ignition coil Thus, if the ignition coil fails to
operate, it doesn$t create any fault code 3nly
e%amination of ignition coil resistance is
availa)le to determine the normal operation of
ignition coil In the normal condition, the
heating value of ignition coil is great during the
operation of the coil, )ut the over-high
temperature of the ignition coil will result in theincrease of its resistance value, and further
cause the unsta)le engine operation, automatic
stop operation and other failures Dowever, the
EC' can monitor the control >ires of the
ignition coil;
1 Control wires short circuit to earth2
/ Control wires short circuit to power supply2
0 Control wires open circuit
8rofile of ignition coil
T11 Ignition Coil roup
Circuit diagram of ignition coil
Pin'
1 #o 1 +C for the coil primary winding +to
EC' 0/42/ #o / +! for the coil primary winding +to
EC' 5/42
0 #o 0 +* for the coil power supply +to the
main relay of the system
17
MainAelay
Digh-6oltagecoil
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"easures on trou(les'3nce one ignition coil
failure is detected, close the fuel injector of the
corresponding cylinder
C-IO2' The over-high temperature of
ignition coil may cause the )ad operation of
engine ignition system
esistance of ignition coil primary >inding'
%.)) to %.+) K
esistance of ignition coil secondary
>inding' ).: to +.; K
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C-IO2'
he pressure must (e released firstly (efore
the fuel system is repaired= and it must (e
ensured that there is no pressure oil in the
fuel pipeline. Pull out the connection of fuel
pump= and then put on the (rake till the
/ehicle stops. In this case= there is already no
pressure oil in this system. -fter repair= the
fuel shall (e pumped to the system firstly
>hen the /ehicle starts initially= the method
of >hich is' to turn on the ignition s>itch=
and turn off it after the completion of self*
checking. epeat this procedure 8 to + times.
1$. Crankshaft Position Sensor !Speed Sensor# !CKPS#-pplication' The cran"shaft position sensor is
used to provide the EC' with the engine$s
speed= turning angle= top dead center signals
which are applied in the engine ignition, fuel
injection and timing system
Structure and Principle' The MT /9'
electronic fuel injection system employs the
magnetic induction coil type speed sensor,
applies the rotation to cut the magnetic force
lines and generate the alternating current and
voltage signals The EC' receives the
alternating signals, shapes these signals, and
then changes them into the digital signals that
can )e identified )y the EC' and applied in the
system control of engine The flywheel ring
gear is installed together with the signal wheel
The latter adapts the 5L gear form, andprovides the EC' with speed= turning angle=
top dead center There is the #o 1 cylinder$s
top dead center in the continuous gap
8rofile of a cran"shaft position sensor
1B
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Chery T11 Service Manual Electric Injection System
rou(le &iagnosis'
The EC' will real-time monitor the sensors and
wires;
1 The sensors has no signal output2
/ The sensor$s output signal is distorted2
0 The sensor signal wire is short circuit2
The sensor signal wire is open circuit
rou(leshooting'
1 E%amine the wires of sensor, and the earth
or short circuit of wire2
/ !pply the three-way instrument to connect
the joints )etween the sensor and harness
and e%amine the connection of power
supply, earth wire and signal wire
Operating temperature' *+% to 1)%
Clearance (et>een the sensor and ring gear'
%.8 to 1.) mm
esistance of sensor' )%+to :1:
T11 Cran"shaft 8osition Sensor
Circuit diagram of cran"shaft position sensor
Pin'
1 #o 1 +! for sensor signal wire high level
+to EC' 1/42
/ #o / +* for sensor signal wire low level
+to EC' /42
0 #o 0 +C for sensor earth +to EC' 704
18. Canister Control Solenoid ,al/e !E,-P#-pplication'It is used to control the rinse air
flow from the canister to the inta"e main pipe
The adsorptive capacity of the canister is
limited If the evaporated gasoline adhesive to
the canister aren$t used out, the gasoline will
volatili(e to the outside and pollute the air as
well as increase the insecure factors
8rofile of a canister control solenoid valve
/9
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Chery T11 Service Manual Electric Injection System
Structure and Principle' There is a solenoid
valve organi(ation inside the canister control
solenoid valve The digitali(ed control pulse
s:uare wave from the engine will control the
opening of the solenoid valve *ased on the
different operation conditions of the engine, the
openings of the canister control solenoid valves
are different ?hen the engine is operating with
large load and idle, the canister control valve
doesn$t put into operation in order to ensure the
output power of engine
rou(le &iagnosis'
1 The sensor-earth wires are short circuit2
/ The sensor-supply wires are short circuit2
0 The sensor wires are open circuit
rou(leshooting'
1 E%amine the short or open circuit of sensor
wires2
/ E%amine the wire jumping among
harnesses2
0 E%amine the short circuit )etween the
sensor and power supply2
+# E%amine the jamming inside the canistercontrol solenoid valve and its ventilation
Operating temperature' *+% to 1$%
esistance of coil' 17 to $$
Operating /oltage' ; to 1: ,
ated operating /oltage' A1$,
T11 Canister Control Solenoid 6alve
Circuit diagram of canister control solenoid
valve
Pin'
1 #o 1 +! for the solenoid valve control +to
EC' @042
/ #o / +* for the power supply of main
relay
/1
Main Aelay
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Chery T11 Service Manual Electric Injection System
1+. -ir Conditioning Control System !-BC#Principle'Turn on these !C switches If )oth
the !C pressure and the data detected )y the
evaporator temperature sensor are normal, the
!C re:uest signal will pass through these
switches and get to the EC' The EC' controls
the !C relay attracting after it detects this signal
!t the same time, it gives stepper motor a speed-
increasing signal, and switches on the electronic
fan !nd the !C system )egins to operate
Conditions to s>itch off -BC system'
1 Throttle position sensor failure2
/ 6ehicle speed sensor failure2
0 ?hen the engine is with large load2
Evaporator temperature sensor failure2
5 The evaporator temperature is less than
15;
@ The engine speed is overspeed2
7 The coolant temperature is greater than
192
Aefueling is too :uic"
rou(le &iagnosis'
1 Short circuit of !C relay wire to earth2
/ Short circuit of !C relay wire to power
supply2
0 3pen circuit of !C relay wire2
Too-low evaporator temperature sensor
temperature2
5 3ver-high evaporator temperature sensortemperature
rou(leshooting'
1 E%amine the wire of !C system2
/ E%amine the damage of !C system$s
evaporator temperature sensor2
0 E%amine the wire jumping inside the
harness
Circuit diagram of !C control system
Pin'
#o 1 for the !C re:uest signal +to EC'
0B42
#o / for the !C relay control +to EC' @4
//
!C Ae:uest Signal
8ower Supply
!C Compressor Clutch
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1). Fan Control !F-2#" $%controls the fan$s lowhigh speed *ased on
the water temperature, air conditioning and other
signals, the control system can control the fan$s low
and high speed operation If the condition is
applica)le, the " $%will control the fan system
delay
Control "ode'
Kor 1stgear, the fan is switched on at B and
switched off at B2
Kor /ndgear, the fan is switched on at 195and
switched off at 1912
If the water temperature is greater than 191
after the fan is switched off, the fan continues to
operate for 1 minute2
If the water temperature is greater than Bafter
the fan is switched off, the fan continues to
operate for 95 minute2
If the water temperature is less than 5after the
fan is switched off, the fan stops2
rou(le &iagnosis'
1 Short circuit of high-speed relay wire to power
supply2
/ Short circuit of high-speed relay wire to earth2
0 3pen circuit of high-speed relay wire2
Short circuit of low-speed relay wire to power
supply2
5 Short circuit of low-speed relay wire to earth2
@ 3pen circuit of low-speed relay wire2
rou(leshooting'
In EC' side, e%amine the short or open circuit of
these wires in accordance with the pins shown in the
left figure
Circuit diagram of fan control system
In this figure a(o/e= the highBlo> speed
pins are the same as the actual pins. Gut
the actual circuit diagram is different from
this circuit diagram a(o/e. he latter is for
reference only.
/0
Main Power Supply
.ual-Speed Kan
Digh-speed fan relay
Gow-speed fan relay
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1:. &efinition of EC Pins
8in Connection 8oint Type 8in Connection 8oint Type
1 Ignition switch control fire wire
+supply
Input / 'nused
0 Speed signal sensor Input 56 standard power supply 3utput
5 56 standard supply earth wire Earth @ Kront o%ygen sensor signal +low level Input
7 'nused 'nused
B 'nused 19 'nused
11 .iagnosis communication 3utput 1/ Speed sensor signal +high level Input
10 'nused 1 'nused
15 'nused 1@ 'nused
17 *attery supply +1/6 Input 1 *attery supply +1/6 Input
1B 'nused /9 56 standard power supply 3utput
/1 56 standard power supply earth wire Earth // 'nused
/0 'nused / Throttle position sensor signal Input
/5 'nused /@ !C evaporator temperature sensor Input
/7 Inta"e manifold temperature sensor Input / Speed sensor signal +low level Input
/B 'nused 09 .iagnosis re:uest Input
01 Engine failure lamp Input 0/ Ignition switch 1 and Input
00 Idle stepper motor drive coil * 3utput 0 Idle stepper motor drive coil ! 3utput
05 'nused 0@ 'nused
07 'nused 0 Aear o%ygen sensor signal +low level Input
0B !C re:uest signal Input 9 'nused
1 'nused / !ir inta"e pressure sensor signal Input
0 Coolant temperature sensor signal Input 'nused
5 Engine speed signal 3utput @ !C relay control 3utput
7 Kuel pump relay control 3utput 'nused
B 'nused 59 Kan high-speed control Input
51 'nused 5/ Ignition coil / and 0 Input
50 Idle stepper motor coil C 3utput 5 Idle stepper motor coil . 3utput
55 Kuel injector 14 Input 5@ Kuel injector /4 Input
57 'nused 5 'nused
5B 'nused @9 'nused
@1 Kront o%ygen sensor heating control Input @/ Kront o%ygen sensor signal +high level Input
@0 Canister control solenoid valve
control
Input @ Aear o%ygen sensor heating control Input
@5 'nused @@ 'nused
@7 Kan low-speed control Input @ 'nused
@B &noc" sensor signal Input 79 Kuel injector 04 Input
71 Kuel injector 4 Input 7/ 'nused
70 Motive earth Earth #o
/
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Chery T11 Service Manual Electric Injection System
Section
Gasic Principles of rou(le &iagnosis
1. Gasic Principles1# Failure Information ecord
" $% electronic control unit continuously detect sensors, actuators, related circuits, failure
lamps, )attery voltage and etc, even detect the electronic control unit itself, and conduct the
relia)ility detection on the sensor output signal, actuator drive signal and internal signal +such
as o%ygen closed-loop control, "noc" control, idle speed control, )attery voltage control and
etc 3nce one failure in a certain process occurs, or one signal value is unrelia)le, the
electronic control unit will immediately set a failure information record in the failure register
of A!M The failure information record will )e stored with the form of failure code, and
displayed in the se:uence of failure occurrence
These failures can )e divided into HSta(le FailureJ and HChance FailureJ +such as the
failures caused )y the transient harness short-circuit or the )ad contact of connecting parts in
accordance with their fre:uency of occurrence
$# Failure State
If the duration of a identified failure occurrence is initially greater than the setting sta)ili(ed
time, the EC' will confirm it is a sta)le failure, and store it as the HSta)le KailureJ If this
failure disappears, it will )e stored as HChance KailureJ and H#one%istentJ If this failure is
identified again, it still )e a HChance KailureJ, )ut a He%istentJ history failure doesn$t ma"e an
influence on the normal operation of a engine
8# Failure ype
a Short circuit to the positive electrode of power supply2
) Short circuit to earth2
c 3pen circuit2
d Signal unrelia)le
+# Four Failure ypes
Failures of -ll Electronic Fuel Injection ,ehicle -re Gasically &efined -s hese ypes.
a Ma% failure, which means its signal is greater than the upper limit of normal
range
) Min failure, which means its signal is less than the lower limit of normal
range
c Signal failure, without signal
d 'nreasona)le failure, with signal, )ut the signal is unreasona)le
/5
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Chery T11 Service Manual Electric Injection System
)# imp*home
Kor some identified important failures, when their duration e%ceeds the setting sta)ili(ed time,
the EC' will apply appropriate software countermeasure to maintain the operation of the
engine and ena)le the vehicle not to stop in its way
:# Failure -larm
" $% electronic fuel injection system is e:uipped with a failure lamp ?hen some
important parts, such as the EC', inta"e manifold a)solute pressure sensor, throttle position
sensor, coolant temperature sensor, "noc" sensor, o%ygen sensor, fuel injector, two drivers of
idle actuator stepper motor, !C relay, fan relay and etc, fail to operate and the corresponding
failure flags are set, the EC' will ena)le the failure lamp to flash and give alarm to warn the
owner of the vehicle that your vehicle has already entered into the failure mode, till the failure
flag is reset
5# &efinition of &iagnosis Connector Interface
5.
;# Failure eadout (y Engine Failure amp
?hen the engine system or its components failure occurs during the operation of engine, the
engine failure lamp will light automatically to remind the driver to e%amine and repair hisher
vehicle in time
.uring the emergency failure handling, you also may conduct some special operations to
ena)le the engine failure lamp to flash fre:uently so as to read the engine failure code, which
is the most economical means to o)tain the failure code Its operation method is as follows;
/@
.efinition of .iagnosis Connector Interface
#'GG 1@ 1/ 6
7 Communication 15 #'GG
@ #'GG 1 #'GG
5 Earth ?ire 10 #'GG
Earth ?ire 1/ #'GG
0 #'GG 11 #'GG/ #'GG 19 #'GG
1 .iagnosis B #'GG
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E%amine and Confirm;
a The voltage of )attery shall ensure the engine gets its startup speed2
) The engine and the whole vehicle$s accessories shall )e in the state of shutdown2
c The throttle is fully closed2
d The transmission is placed in the neutral gear2
e The ignition switch is turned off2
f !pply wires to ena)le the diagnosis reuest terminal 1 of the failure diagnosis
connectors to short circuit with the earth >ire terminal + or)2
g Turn the ignition switch to 3#, )ut don$t start up the engine2
In this case, if the system currently has a failureor a history failure codeuncleared after
the failure removal, the engine failure lamp will flash in accordance with a certain rule, and
the output system detects the code of failure2 +the failure code is read out and, at the same
time, the idle control /al/ewill conduct the reset action2
!fter the completion of failure code readout, the ignition switch is turned off and the
diagnosis re:uest short-circuit wire is removed2
The rules that the failure lamp flashes to report the failure are;
Aeport the failure in accordance with the se:uence of failure code memori(ed2
0/ s pause )etween two failure codes The digits flash at the fre:uency of light for
9 s and e%tinguish for 9s, with 1/ s pause )etween two digits2
The num)er 9 flashes19 times, and other num)ers corresponds to the flash
num)ers2
Ta"ing the failure code 9119 and 90 as an e%ample;
If the diagnosis re:uest doesn$t interrupt, restart to report 9119 failure code
C-IO2' !fter the removal of failure, it is recommended to apply the failure diagnosis
instrument to clear these failure codes so as not to ma"e an influence on the failure detectionduring the ne%t repair
/7
.iagnosis re:uest short circuit to earth Turn on the ignition switch
Kailure lamp flashes for one time 8ause for 0/s 19 times 8ause for 1/s
1 time 8ause for 1/s 19 times 8ause for 0/s 19 times 8ause for 1/s
times 8ause for 1/s times 8ause for 1/s 0 times
8ause for 0/s
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IS3 B11-/ Standard .iagnosis Connector
7# emo/al of Failure Information ecord
!fter a failure is removed, the failure information record stored in a memory shall )e cleared
!lthough failure information has occurred when the ignition switch is turned on, it isn$t
recorded if it isn$t "ept up to the end of sta)ili(ed time
!fter the engine starts up successfully the specified times, the failure code will )e cleared
automatically
!pply a failure diagnosis instrument and the HKailure Memory AesetJ instruction to clear the
failure information record
8ull out the connector from EC' or remove the wires of )attery to clear the failure
information record stored in the e%ternal A!M
1%# Failure Search
!fter a failure information record is o)tained with the help of the means a)ove, only the
appro%imate location where the failure occurs is "nown, )ut it doesn$t mean that the failure is
found )ecause the reason to create a failure information may )e the damage of a electrical
component +such as sensor or actuator or EC', etc, open circuit of a wire, short circuit of a
wire to earth or the positive electrode of )attery, even may )e a mechanical fault
The failure is inherent, and its e%ternal e%pressive results are various "inds of symptoms
!fter a symptom is found, it is re:uired firstly to use a failure diagnosis instrument or some
flash codes to chec" whether there are some failure information records !nd, )ased on these
information records, the related failure shall )e removed Then, you can search the failure in
accordance with the symptom of the engine
/
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Chery T11 Service Manual Electric Injection System
$. Engine Failure Code a(le&elphi " $% Engine "anagement System Failure Code a(le
Code .escription Code .escription
89195-1 3ver-high inta"e manifold a)solute
pressure sensor signal
890-1 Short-circuit )etween the wire of canister
control solenoid valve and the positive of
electrode power supply
89195-/ Too-low inta"e manifold a)solute
pressure sensor signal
890-/ 3pen circuit of the wire of canister
control solenoid valve or short circuit to
earth
89119-1 Too-low inta"e temperature sensor signal 899-1 Short circuit of radiator low-speed fan
relay drive circuit to the positive
electrode of power supply
89119-/ 3ver-high inta"e temperature sensor
signal
899-/ 3pen circuit of radiator low-speed fan
relay drive circuit or short circuit to earth
89115-1 Too-low coolant temperature sensor
signal
891-1 Short circuit of radiator high-speed fan
relay drive circuit to the positive
electrode of power supply
89115-/ 3ver-high coolant temperature sensor
signal
891-/ 3pen circuit of radiator high-speed fan
relay drive circuit or short circuit to earth
891/9-1 3ver-high throttle position sensor signal 89/-1 Short circuit of !C cooling fan relay
/B
.iagnosis Interface
8ower Supply
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drive circuit to the positive electrode of
power supply
891/9-/ Too-low throttle position sensor signal 89/-/ 3pen circuit of !C cooling fan relay
drive circuit or short circuit to earth
89109- #o o%ygen sensor signal 89599-9 #o vehicle speed sensor signal89105-1 Short circuit of o%ygen sensor heating
circuit to the positive electrode of power
supply
89595-9 Idle control error
89105-/ 3pen circuit of o%ygen sensor heating
circuit or short circuit to earth
895@9-1 3ver-high system voltage
89179-1 3ver-long o%ygen sensor indication of
time of rich air-fuel-ratio
89@97-9 &noc" control system failure
89179-/ 3ver-long o%ygen sensor indication of
time of lean air-fuel-ratio
89@59-1 Short circuit )etween the failure lamp
wire and the positive electrode of power
supply
89/91-9 Kuel injector ! +#o 1 cylinder circuit
failure
89@59-/ 3pen circuit of the failure lamp wire or
short circuit to earth
89/9/-9 Kuel injector * +#o 0 cylinder circuit
failure
81/09-1 Short circuit of main relay circuit to the
positive electrode of power supply
89/90-9 Kuel injector C +#o cylinder circuit
failure
81/09-/ 3pen circuit of main relay circuit or
short circuit to earth
89/9-9 Kuel injector . +#o / cylinder circuitfailure
81509-1 Short circuit of !C compressor relaycircuit to the positive electrode of power
supply
89/09-1 Short circuit of fuel pump relay to the
positive electrode of power supply
81509-/ 3pen circuit of !C relay circuit or short
circuit to earth
89/09-/ 3pen circuit of fuel pump relay or short
circuit to earth
81@9-9 EE8A3M error
890/5-9 *ad connection to the "noc" sensor 81@19-9 !nti-theft controller error
89005-9 #o 5L cran"shaft position sensor signal 81@19- ECM and anti-theft controller
communication error
89005- 5L cran"shaft position sensor signal
error
8/999-1 3ver-high temperature of front !C
evaporator
890/-9 Gow camshaft position signal 8/999-/ Too-low temperature of front !C
evaporator
890/-/ Digh camshaft position signal 8/991-1 3ver-high temperature of rear !C
evaporator
89051-1 Short circuit )etween the ignition coil 1-
cylinder drive circuit and the positive
electrode of power supply
8/991-/ Too-low temperature of rear !C
evaporator
89051-/ 3pen circuit of the ignition coil 1-
cylinder drive circuit or short circuit to
8/199-/ Short circuit of rear !C trip relay to
)attery
09
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earth
8905/-1 Short circuit )etween the ignition coil /-
0 cylinder drive circuit and the positive
electrode of power supply
8/199- 3pen circuit of rear !C trip relay or
short circuit to earth
8905/-/ 3pen circuit of the ignition coil /-0cylinder drive circuit or short circuit to
earth
8. "ethod of rou(le Shooting
Kailure Code; P%1%)*1 O/er*high intake manifold a(solute pressure sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
01
T11 Inta"e 8ressureTemperature Sensor
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?hen the engine stops; B9 "8a
?hen the engine idles; N 5 "8a
?hen the engine operates; the pressure of manifold changes
as the opening of throttle
If the cylinder pressure detection technology is applied,
there is 59= of pro)a)ility that the fuel injection se:uence
has 0@9 degree of ram off
Connection terminal; MT
/9'
8ressureTemperature
Sensor
#ormal Measurement
Signal
56 reference voltage; 9 * 56
Manifold pressure signal; / ! 95 to 56
Sensor signal earth; /1 . 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation
#o T8S failure
M!8 O B117 "8a
T8S P 1B11=
Kailure duration O /5 s
1 Short circuit of harness pressure
signal circuit to 56 reference
voltage circuit or the positive
electrode of power supply
/ Sensor damaged
0 ECM$s pressure signal input
interface failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
Kailure Code; P%1%)*$ oo*lo> intake manifold a(solute pressure sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
?hen the engine stops; B9 "8a
?hen the engine idles; N 5 "8a
?hen the engine operates; the pressure of manifold changes
as the opening of throttle
If the cylinder pressure detection technology is applied,
there is 59= of pro)a)ility that the fuel injection se:uence
has 0@9 degree of ram off
Connection terminal; MT
/9'
8ressureTemperature
Sensor
#ormal
Measurement Signal
56 reference voltage; 9 * 56
Manifold pressure signal; / ! 95 to 56
Sensor signal earth; /1 . 96
Condition for .etermination 8ossi)le Aeason !ctions
0/
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#o T8S failure
M!8 P 197 "8a
A8M P 1959 rpm
T8S O 175=
Kailure duration O /5 s
1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of harness pressure
signal circuit
0 Short circuit of harness pressure
signal circuit to earth
3pen circuit of 56 reference
voltage circuit
5 3pen circuit of sensor signal earth
wire
@ Darness 56 reference voltage
direction is reverse with the
reference earth wire +this failure
may cause the damage of sensor
7 Sensor damaged
ECM$s pressure signal input
interface failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aepair harness
@ Aepair harness
7 Aeplace sensor
Aeplace ECM
Kailure Code; P%11%*1 oo*lo> intake temperature sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The air inta"e temperature shall )e e:ual to the coolant
temperature, )ut not more than /5
Connection terminal; MT
/9'
8ressureTemperature
Sensor
#ormal
Measurement Signal
Inta"e temperature signal; /7 C 95 to 56
Sensor signal earth; /1 . 96
Condition for .etermination 8ossi)le Aeason !ctions
00
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Engine operation time O 1/9 s
M!T P -0/5
Kailure duration O / s
1 'nrelia)le connection of the connecting
parts
/ 3pen circuit of temperature signal
circuit
0 3pen circuit of sensor signal earth
Short circuit of temperature signal wire
to the positive electrode of power
supply
5 Sensor damaged
@ ECM$s this signal input interface failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace sensor
@ Aeplace ECM
Kailure Code; P%11%*$ O/er*high intake temperature sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The air inta"e temperature shall )e e:ual to the coolant
temperature, )ut not more than /5
Connection terminal; MT
/9
MT
/9'
Inta"e Temp
Sensor
8ressureTemperat
ure
Sensor
#ormal
Measurement Signal
Inta"e temperature signal; 05 /7 C 95 to 56
Sensor signal earth; / /1 . 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation time O @9 s
M!T O 15
Kailure duration O / s
1 Short circuit of temperature signal
circuit to earth
/ Sensor damaged
0 ECM$s this signal input interface failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
0
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T11 ?ater Temperature Sensor
Kailure Code; P%11)*1 oo*lo> coolant temperature sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
!pply the inta"e temperature during startup, gradually
increase up to 7B5and then "eep this temperature
Connection terminal; MT
/9'
Coolant
Temperature
Sensor
#ormal
Measurement Signal
Coolant temperature signal; 0 * 95 to 56
Sensor signal earth; 95 ! 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation time O 19 s
CTS P -0/5
Kailure duration O / s
1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of temperature signal
circuit
0 3pen circuit of sensor signal to
earth
Short circuit of temperature signal
circuit to the positive electrode of
power supply
5 Sensor damaged
@ ECM$s this signal input interface
failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace sensor
@ Aeplace ECM
05
To Instrument
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Kailure Code; P%11)*$ O/er*high coolant temperature sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
!pply the inta"e temperature during startup, gradually
increase up to 7B5and then "eep this temperature
Connection terminal; MT
/9
MT
/9'
Coolant
Temperature
Sensor
#ormal
Measurement Signal
Coolant temperature signal; 0 0 * 95 to 56
Sensor signal earth; 07 95 ! 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation time O / s
CTS O 105
Kailure duration O / s
1 Short circuit of temperature
signal circuit to earth
/ Sensor damaged
0 ECM$s this signal input interface
failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
0@
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T11 Throttle 8osition Sensor
Kailure Code; P%1$%*1 O/er*high throttle sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
.uring idle, set the opening of throttle position sensor as
9=2 for other speeds, the opening of throttle position sensor
changes as speed
The throttle position sensor automatic reset function pauses
The function to clear the remained fuel and air in a cylinder
pauses
Connection terminal; MT
/9'
Throttle 8osition Sensor #ormal
Measurement Signal
56 reference voltage; /9 ! 56
Throttle position signal; / C 95 to 56
Sensor signal earth; 95 * 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation, )ut speed P 0999
rpm
#o M!8 failure, and M!8 P 79 "8a
Kailure duration O / s
1 Short circuit of sensor signal
circuit to the positive electrode of
power supply or the 56 reference
voltage circuit
/ Sensor damaged
0 ECM$s this signal input interface
failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
07
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Kailure Code; P%1$%*$ oo*lo> throttle sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
.uring idle, set the opening of throttle position sensor as
9=2 for other speeds, the opening of throttle position sensor
changes as speed
The throttle position sensor automatic reset function pauses
Clear function pauses
Connection terminal; MT /9 MT
/9'
Throttle 8osition Sensor #ormal
Measurement Signal
56 reference voltage; 0@ /9 ! 56
Throttle position signal; /@ / C 95 to 56
Sensor signal earth; 07 95 * 96
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O / s 1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of sensor signal circuit
0 Short circuit of sensor signal
circuit to earth
Sensor damaged
5 ECM$s this signal input interface
failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aeplace sensor
5 Aeplace ECM
0
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T11 3%ygen Sensor
Kailure Code; P%18%*+ 2o o@ygen sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The air-fuel-ratio can$t )e closed-loop controlled
Connection terminal; MT
/9'
Deating-type
3%ygen Sensor
#ormalMeasurement Signal
System main power supply; Q C 1/6
Deating drive; @1 . 96
3%ygen sensor$s high signal; @/ * 9 to 1999m6
fluctuation
3%ygen sensor$s low signal; 9@ ! 96
Condition for .etermination 8ossi)le Aeason !ctions
0@9/m6 P o%ygen sensor signal P
501Bm6
Engine operation time O 9 s
#o T8S and M!8 failure
Coolant temperature O 7/
Enter the closed-loop fuel control state
T8S O 1915@=
Kailure duration O 15 s
1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of sensor signal
circuit
0 Sensor poisoning or failure due
to over-heating
ECM$s this signal input interface
failure
1 Connect again
/ Aepair harness
0 Aeplace sensor
Aeplace ECM
0B
Main Aelay
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Kailure Code; P%18)*1 Short circuit of o@ygen sensor heating circuit to the
positi/e electrode of po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears, and
turn off the ignition switch
System closed-loop operating time postponed
Connection terminal; MT /9' Deating-type
3%ygen Sensor
#ormalMeasurement Signal
System main power supply; Q C 1/6
Deating drive; @1 . 96
3%ygen sensor$s high signal; @/ * 9 to 1999m6
fluctuation
3%ygen sensor$s low signal; 9@ ! 96
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 1 s 1 Short circuit of heating drive
circuit to the positive electrode
of power supply
/ Sensor damaged
0 ECM$s this signal input interface
failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
Kailure Code; P%18)*$ Open circuit of o@ygen sensor heating circuit or short
circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears, and
turn off the ignition switch
System closed-loop operating time postponed
Connection terminal; MT
/9'
Deating-type
3%ygen Sensor
#ormalMeasurement Signal
System main power supply; Q C 1/6
Deating drive; @1 . 96
3%ygen sensor$s high signal; @/ * 9 to 1999m6
fluctuation
3%ygen sensor$s low signal; 9@ ! 96
Condition for .etermination 8ossi)le Aeason !ctions
9
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#o main relay failure
Kailure duration O 1 s
1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of harness$s this
heating drive circuit
0 Short circuit of harness$s this
heating drive circuit to earth
Sensor damaged
5 ECM$s this signal input interface
failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aeplace sensor
5 Aeplace ECM
Kailure Code; P%15%*1 O/er*long o@ygen sensor indication of time of rich air*
fuel*ratio
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The air-fuel-ratio can$t )e closed-loop controlled
Connection terminal; MT
/9'
Deating-type
3%ygen Sensor
#ormalMeasurement Signal
System main power supply; Q C 1/6
Deating drive; @1 . 96
3%ygen sensor$s high signal; @/ * 9 to 1999m6
fluctuation
3%ygen sensor$s low signal; 9@ ! 96Condition for .etermination 8ossi)le Aeason !ctions
3%ygen sensor signal O BB/@m6
Engine operation time O 9 s
#o T8S and M!8 failure
Coolant temperature O 7/
Enter the closed-loop fuel control state
T8S O 1915@=
Kailure duration O 15 s
1 Short circuit of sensor signal
circuit to 56 or 1/6 circuit
/ Sensor damaged
0 ECM$s this signal input interface
failure
1 Aepair harness
/ Aeplace sensor
0 Aeplace ECM
Kailure Code; P%15%*$ O/er*long o@ygen sensor indication of time of lean air*
fuel*ratio
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The air-fuel-ratio can$t )e closed-loop controlled
Connection terminal; MT
/9'
Deating-type
3%ygen Sensor
#ormalMeasurement Signal
System main power supply; Q C 1/6
Deating drive; @1 . 963%ygen sensor$s high signal; @/ * 9 to 1999m6
1
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fluctuation
3%ygen sensor$s low signal; 9@ ! 96
Condition for .etermination 8ossi)le Aeason !ctions
3%ygen sensor signal P 5/90m6
Engine operation time O 9 s #o T8S and M!8 failure
Coolant temperature O 7/
Enter the closed-loop fuel control
state
T8S O 1915@=
Kailure duration O 15 s
1 Short circuit of sensor signal
circuit to earth/ Sensor highlow signal circuit
reverse
0 Sensor damaged
0 ECM$s this signal input interface
failure
1 Aepair harness
/ Aepair harness
0 Aeplace sensor
Aeplace ECM
T11 Kuel Injector roup
Kailure Code; P%$%1*% Fuel injector - !2o 1 cylinder# circuit failure
P%$%$*% Fuel injector G !2o 8 cylinder# circuit failure
P%$%8*% Fuel injector C !2o + cylinder# circuit failure
P%$%+*% Fuel injector & !2o $ cylinder# circuit failure
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Connection terminal; MT
/9'
Kuel #o((le #ormalMeasurement Signal
System main power supply; Q ! 1/6
Kuel injector ! +#o 1 cylinder; 55 * 9 to 1/6 appro%
s:uare
Kuel injector * +#o 0 cylinder; 5@ * 9 to 1/6 appro%
s:uare
Kuel injector C +#o cylinder; 71 * 9 to 1/6 appro%
s:uareKuel injector . +#o / cylinder; 79 * 9 to 1/6 appro%
/
Main Aelay
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s:uare
Condition for .etermination 8ossi)le Aeason !ctions
Ignition switch is turn on
Kuel pump operation normal
Ignition voltage O 196
1 Short circuit of
corresponding no((le circuit
to the positive electrode ofpower supply or to earth
/ 3pen circuit of
corresponding no((le circuit
0 'nrelia)le Sensor highlow
signal circuit reverse
#o((le circuit damaged
5 ECM$s this signal output
interface failure
1 Aepair harness
/ Aepair harness
0 Connect again
Aeplace
5 Aeplace ECM
Kailure Code; P%$8%*1 Short circuit of fuel pump relay to the positi/e electrode of
po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Connection terminal; MT
/9'
Kuel 8ump Aelay #ormal MeasurementSignal
System main power supply; Q Aefer to Electrical
System .escription
1/6
Aelay drive; 7 Aefer to ElectricalSystem .escription
96 +3perating and 1/6+Stop
0
.ynamic Aelay
Main 8ower Supply
T11 Kuel 8ump Control
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Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 15@/5 s 1 Short circuit of relay drive
circuit to the positive
electrode of power supply
/ Aelay damaged
0 ECM$s this signal output
control interface failure
1 Aepair harness
/ Aeplace relay
0 Aeplace ECM
Kailure Code; P%$8%*$ Open circuit of fuel pump relay or short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Connection terminal; MT
/9'
Kuel 8ump Aelay #ormal MeasurementSignal
System main power supply; Q Aefer to Electrical
System .escription
1/6
Aelay drive; 7 Aefer to ElectricalSystem .escription
96 +3perating and1/6 +Stop
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 15@/5 s 1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of the
connection system main
power supply circuit
0 Short circuit of relay drive
circuit to the negative
electrode of power supply
3pen circuit of relay drive
circuit
5 Aelay damaged
@ ECM$s this signal output
control interface failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace relay
@ Aeplace ECM
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T11 &noc" Sensor
Kailure Code; P%8$)*% Gad connection to knock sensor
Set emergency control scheme; Switch on the failure lamp till the ignition switch is
turned off
!pply the safety ignition advance angle ta)leConnection terminal; MT
/9'
&noc" Sensor #ormal MeasurementSignal
&noc" signal; @B 9 to 1 6
Sensor signal earth; 95 96
Condition for .etermination 8ossi)le Aeason !ctions
5
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Kailure duration O 15@/5 s 1 'nrelia)le connection of the
connecting parts
/ 3pen circuit of "noc" signal
circuit
0 Short circuit of sensor signal
circuit to earth
Short circuit of "noc" signal
circuit to other circuits
5 Sensor damaged
@ ECM$s this signal output
control interface failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace relay
@ Aeplace ECM
T11 Cran"shaft 8osition Sensor
Kailure Code; P%88)*% 2o );H crankshaft position sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Engine is difficult to start up
Connection terminal; MT
/9'
Cran"shaft 8ositionSensor
#ormal MeasurementSignal
Digh signal from cran"shaft; 1/ ! O 99m6 sinusoidal
wave +with senor *
Gow signal from cran"shaft; / * O 99m6 sinusoidal
wave +with senor !System earth wire; 70 C 96
@
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Condition for .etermination 8ossi)le Aeason !ctions
Start up the engine
#o engine speed signal
M!8 decreases )y /B59B "8a
System voltage decreases )y 96
6ehicle speed P "mh
Kailure duration O / s
1 'nrelia)le connection of the
connecting parts
/ Aeserve connection of
highlow signal
0 3pen circuit of signal circuit
Short circuit of signal circuit to
other circuits
5 Sensor damaged
@ ECM$s this signal input
interface failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace relay
@ Aeplace ECM
Kailure Code; P%88)*% 2o );H crankshaft position sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Connection terminal; MT
/9'
Cran"shaft 8osition Sensor #ormal MeasurementSignal
Digh signal from cran"shaft; 1/ ! O 99m6 sinusoidal
wave +with senor *
Gow signal from cran"shaft; / * O 99m6 sinusoidal
wave +with senor !
System earth wire; 70 C 96
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation
The num)er of teeth entering into
ECM isn$t e:ual to 5 during 5
continuous cycles
1 *ad shielding of signal circuit
/ Koreign metal materials in the
5L gear ring
1 !pply the
shielded wire
/ Clean the 5L
gear ring
7
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T11 Ignition Coil roup
Kailure Code; P%8)1*1 Short circuit (et>een the ignition coil 1*+ cylinder dri/e
circuit and the positi/e electrode of po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
Stop the fuel injection for 1- cylinder
The target idle steps up to 1,/99 rpm
Connection terminal; MT Ignition Coil #ormal Measurement Signal
Main Aelay
Digh-6oltage Coil
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/9'
System main power
supply;
Q * 1/6
1- cylinder drive; 0/ C 9 to 1/ 6 appro% s:uare wave
signalInduction pea" value O 099 6
/-0 cylinder drive; 5/ ! 9 to 1/ 6 appro% s:uare wave
signal
Induction pea" value O 099 6
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 1/5 s 1 Short circuit of 1-
cylinder drive circuit to the
positive electrode of power
supply
/ Ignition coil damaged
0 ECM failure
1 Aepair harness
/ Aeplace ignition coil
0 Aeplace ECM
Kailure Code; P%8)1*$ Open circuit of the ignition coil 1*+ cylinder dri/e circuit or
short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears Stop the fuel injection for 1- cylinder
Connection terminal; MT
/9'
Ignition Coil #ormal MeasurementSignal
System main power supply; Q * 1/6
1- cylinder drive; 0/ C 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O
099 6
/-0 cylinder drive; 5/ ! 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O
099 6
Condition for .etermination 8ossi)le Aeason !ctions
1 'nrelia)le connection of the
connecting parts
/ Short circuit of 1- cylinder
drive circuit to the negative
electrode of system power
supply0 3pen circuit of 1- cylinder
1 Connect again
/ Aepair harness
0 Aepair harness
B
Kailure duration O 1/5 s
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Chery T11 Service Manual Electric Injection System
drive circuit
Ignition coil damaged
5 ECM failure
Aeplace ignition coil
5 Aeplace ECM
Kailure Code; P%8)$*1 Short circuit (et>een the ignition coil $*8 cylinder dri/ecircuit and the positi/e electrode of po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
Stop the fuel injection for /-0 cylinder
The target idle steps up to 1,/99 rpm
Connection terminal; MT
/9'
Ignition Coil #ormal MeasurementSignal
System main power supply; Q * 1/6
1- cylinder drive; 0/ C 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O 099
6
/-0 cylinder drive; 5/ ! 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O 099
6
Condition for .etermination 8ossi)le Aeason !ctions
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Kailure duration O 1/5 s 1 Short circuit of /-0 cylinder
drive circuit to the positive
electrode of power supply
/ Ignition coil damaged
0 ECM failure
1 Aepair harness
/ Aeplace ignition coil
0 Aeplace ECM
Kailure Code; P%8)$*$ Open circuit of the ignition coil $*8 cylinder dri/e circuit or
short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears
Stop the fuel injection for 1- cylinder
Connection terminal; MT
/9'
Ignition Coil #ormal Measurement Signal
System main power supply; Q * 1/6
1- cylinder drive; 0/ C 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O 099 6
/-0 cylinder drive; 5/ ! 9 to 1/ 6 appro% s:uare
wave signal
Induction pea" value O 099
6
Condition for .etermination 8ossi)le Aeason !ctions
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Kailure duration O 1/5 s 1 'nrelia)le connection of
the connecting parts
/ Short circuit of /-0
cylinder drive circuit to the
negative electrode of
system power supply
0 3pen circuit of /-0
cylinder drive circuit
Ignition coil damaged
5 ECM failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aeplace ignition coil
5 Aeplace ECM
5/
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T11 Canister Control Solenoid 6alve
Kailure Code; P%++8*
1
Short*circuit (et>een the >ire of canister control solenoid
/al/e and the positi/e of electrode po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
Shut off the canister control solenoid valve
Connection terminal; MT
/9'
Canister ControlSolenoid 6alve
#ormal MeasurementSignal
System main power supply; Q * 1/6
Solenoid valve drive; @0 ! 9 to 1/ 6 s:uare wave
signal
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O / s 1 Short circuit of solenoid
valve drive circuit to the
positive electrode of power
supply
/ Solenoid valve damaged
0 ECM failure
1 Aepair harness
/ Aeplace solenoid
valvel
0 Aeplace ECM
50
Main Aelay
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Chery T11 Service Manual Electric Injection System
Kailure Code; P%++8*$ Open circuit of the >ire of canister control solenoid /al/e or
short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears
Shut off the canister control solenoid valve
Connection terminal; MT
/9'
Canister ControlSolenoid 6alve
#ormal MeasurementSignal
System main power supply; Q * 1/6
Solenoid valve drive; @0 ! 9 to 1/ 6 s:uare wave
signal
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 5 s 1 'nrelia)le connection of the
connecting parts
/ Short circuit of solenoid
valve drive circuit to the
negative electrode of system
power supply
0 3pen circuit of solenoid
valve drive circuit
3pen circuit with system
main power supply
connection circuit
5 Solenoid valve damaged
@ ECM failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace solenoid valve@ Aeplace ECM
5
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Kailure Code; P%+;%*1 Short circuit of radiator lo>*speed fan relay dri/e
circuit to the positi/e electrode of po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Kan doesn$t operate, till the water temperature increases
to Band then the high-speed fan activates
Connection terminal; MT
/9'
Gow-speed Kan Aelay #ormalMeasurement Signal
*attery; Q Aefer to Electrical
System .escription
1/6
Aelay drive; @7 Aefer to Electrical
System .escription
96 +3perating and
1/6 +Stop
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 0 s 1 Short circuit of relay drive
circuit to the positive electrode
of power supply
/ Aelay damaged
0 ECM failure
1 Aepair harness
/ Aeplace relay
0 Aeplace ECM
55
Main 8ower Supply
.ual-speed Kan
Digh-speed Kan Aelay
Gow-speed Kan Aelay
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Kailure Code; P%+;%*$ Open circuit of radiator lo>*speed fan relay dri/e circuit or
short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Kan doesn$t operate +open circuit, till the water temperature
increases to Band then the high-speed fan activates
Kan operates normally +short circuit to earth
Connection terminal; MT /9' Gow-speed Kan Aelay #ormalMeasurement Signal
*attery; Q Aefer to Electrical System
.escription
1/6
Aelay drive; @7 Aefer to Electrical System.escription
96 +3perating and1/6 +Stop
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 0 s 1 'nrelia)le connection of the
connecting parts
/ Short circuit of relay drive circuit to
the negative electrode of power
supply
0 3pen circuit of relay drive circuit
3pen circuit with the )attery
connection circuit
5 Aelay damaged
@ ECM failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace relay
@ Aeplace ECM
Kailure Code; P%+;1*1 Short circuit of radiator high*speed fan relay dri/e circuit to
the positi/e electrode of po>er supply
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Connection terminal; MT /9' Digh-speed Kan Aelay #ormal MeasurementSignal
*attery; Q Aefer to Electrical System
.escription
1/6
Aelay drive; 59 Aefer to Electrical System
.escription
96 +3perating and
1/6 +Stop
Condition for .etermination 8ossi)le Aeason !ctions
5@
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Kailure duration O 0 s 1 Short circuit of relay drive circuit
to the positive electrode of power
supply
/ Aelay damaged
0 ECM failure
1 Aepair harness
/ Aeplace relay
0 Aeplace ECM
Kailure Code; P%+;1*$ Open circuit of radiator high*speed fan relay dri/e circuit or
short circuit to earth
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
Kan operates normally +short circuit to earth
Connectionterminal;
MT /9' Digh-speed Kan Aelay #ormalMeasurement Signal
*attery; Q Aefer to ElectricalSystem .escription
1/6
Aelay drive; 59 Aefer to Electrical
System .escription
96 +3perating and
1/6 +Stop
Condition for .etermination 8ossi)le Aeason !ctions
Kailure duration O 0 s 1 'nrelia)le connection of the connecting
parts
/ Short circuit of relay drive circuit to the
negative electrode of power supply
0 3pen circuit of relay drive circuit
3pen circuit with the )attery connection
circuit
5 Aelay damaged
@ ECM failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aepair harness
5 Aeplace relay
@ Aeplace ECM
57
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T11 6ehicle Speed Sensor
Kailure Code; P%)%%*% 2o /ehicle speed sensor signal
Set emergency control scheme; Switch on the failure lamp till the failure disappears
#'GG
It is possi)le to ta"e some driving limit measures
Connection terminal; MT
/9'
6ehicle Speed Sensor #ormalMeasurement Signal
Sensor signal earth; 90 9 to 1/6 s:uare
wave
Condition for .etermination 8ossi)le Aeason !ctions
Engine operation
6ehicle speed P / "mh
M!8 P /5/ "8a
1,/99 rpm P engine speed P 5999 rpm
Throttle closed
Kailure duration O 5 s
1 'nrelia)le connection of the
connecting parts
/ Interrupt of signal circuit from
the automatic transmission to
instruments
0 Interrupt of harnesses from
instruments to ECM
6ehicle speed sensor damaged
5 Instrument failure
1 Connect again
/ Aeplace fle%i)le
shaft or signal
wire
0 Aepair harness
Aeplace vehicle
speed sensor
5 Aepair or
replaceinstrument
5
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Chery T11 Service Manual Electric Injection System
@ ECM failure @ Aeplace ECM
T11 Idle Stepper Motor
Kailure Code; P%)%)*% Idle Control Error
Set emergency control scheme; Switch on the failure lamp till the failure disappears
8ause the idle control
Connection terminal; MT /9' Idle Control 6alve #ormal MeasurementSignal
Idle control valve !-high; 5 . 9 to 1/6 s:uare wave
+with idle valve C
Idle control valve !-low; 50 C 9 to 1/6 s:uare wave
+with idle valve .
Idle control valve *-high; 00 * 9 to 1/6 s:uare wave
5B
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+with idle valve !
Idle control valve !-low; 0 ! 9 to 1/6 s:uare wave
+with idle valve *
Condition for .etermination 8ossi)le Aeason !ctions
Engine idle operation?ater temperature reaches the normal
value
#o T8S and 6SS failure
.eviation from the target speed O 19
rpm
Kailure duration O 15 s
1 'nrelia)le connection of theconnecting parts
/ 3pen circuit of any circuit of
idle valve
0 Error of corresponding relation
)etween the idle valve
connecting parts and ECM
connecting parts
Inta"e manifold lea"age
5 Idle control valve damaged
@ ECM failure
1 Connect again
/ Aepair harness
0 Aepair harness
Aemove the lea"age
failure
5 Aeplace idle control
valve
@ Aeplace ECM
Kailure Code; P%):%*1 O/er*high system /oltage
Set emergency control scheme; Switch on the failure lamp till the failure disappears
The system stops fuel injection
Connection terminal; MT
/9'
Ignition Switch #ormal Measurement Signal
Ignition switch; 91 Aefer to Electrical
System .escription
1/6
Condition for .etermination 8ossi)le Aeason !ctions
Turn on the ignition switch
System voltage O 17/ 6
Kailure duration O 5 s
1 enerator regulator
damaged
/ Mista"enly apply the
high-voltage )attery
1 Aeplace the damaged
voltage regulator
/ !pply proper )attery
@9
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T11 &noc" Sensor
Kailure Code; P%:%5*% Knock control system failure
Set emergency control scheme; Switch on the failure lamp till the ignition switch is turned off
The ignition advance angle will postpone +apply safety
ignition advance control
Connection terminal; @B4 MT /9' ECM #ormal Measurement Signal
ECM; ECM internal failure Q
Condition for .etermination 8ossi)le Aeason !ctions
1 ECM failure 1 Aeplace ECM
@1
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Kailure Code; P%:)%*1 Short circuit (et>een the failure lamp >ire and the positi/e
electrode of po>er supply
Set emergency control scheme; #o light
Connection terminal; MT /9' System Kailure Gamp #ormal MeasurementSignal
Ignition switch; Q Aefer to Electrical System.escription
1/ 6
Gamp drive; 01 Aefer to Electrical System.escription
1/ 6 +3# and 9 6+3KK
Cond