CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Engine Coolant Temperature (ECT) Sensor
Description
The Engine Coolant Temperature (ECT) sensor threads into the coolant outlet connector. The ECT is a negative
thermal coefficient sensor.
Operation
The ECT provides an input to the Engine Control Module (ECM). As temperature increases, resistance of the sensor
decreases. As coolant temperature varies, the ECT sensor resistance changes resulting in a different voltage value
at the ECT sensor signal circuit. The ECM uses the input to control air-fuel mixture, timing, A/C compressor and
radiator fan on/off times.
Removal & Installation
1. Disconnect the negative battery cable.
2. Drain the cooling system (See Cooling System Draining Procedure in Section 06 Cooling System).
WARNING!
Never remove the pressure relief cap under any conditions while the engine is operating or hot. Failure to follow
these instructions could result in personal injury or damage to the cooling system or engine. To avoid having
scalding hot coolant or steam blow out of the cooling system, use extreme care when removing the pressure
relief cap. Wait until the engine has cooled, then wrap a thick cloth around the pressure relief cap and turn it
slowly one turn (counterclockwise). Step back while the pressure is released from the cooling system. When you
are certain all the pressure has been released, (with a cloth) turn and remove the pressure relief cap. Failure to
follow these instructions may result in serious personal injury.
3. Disconnect the coolant temperature sensor electri-cal connector.
CAUTION:
Remove the coolant temperature sensor when
the engine is cold.
4. Remove the engine coolant temperature sensor(1).
(Tighten: Engine coolant temperature sensor to 20
N·m)
5. Discard the O-ring.
LTSM030035
03
03–217Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6. Installation is in the reverse order of removal.
NOTE :
After installed the engine coolant temperature sensor, check the coolant level.
Knock Sensor
Description
The knock sensor is attached to the cylinder block. The knock sensor is designed to detect engine vibration that is
caused by detonation.
Operation
When the knock sensor detects a knock in one of the cylinders, it sends an input signal to the Engine Control Module
(ECM). In response, the ECM retards ignition timing for all cylinders by a specified amount.
Knock sensors contain a piezoelectric material which constantly vibrates and sends an input voltage (signal) to the
ECM while the engine operates. As the intensity of the crystal’s vibration increases, the knock sensor output voltage
also increases.
The ECM ignores knock sensor input during engine idle conditions. Once the engine speed exceeds a specified
value, knock retard is allowed.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the knock sensor electrical connector.
3. Remove the knock sensor retaining bolt (1) and remove the knock sensor.
(Tighten: Knock sensor retaining bolt to 20 N·m)
4. Installation is in the reverse order of removal.
Oxygen Sensor
Description
This vehicle is equipped with two oxygen sensors (upstream oxygen sensor & downstream oxygen sensor). The oxy-
gen sensors are located before and after the three way catalyst. The oxygen sensors continually monitor the oxygen
level in the exhaust gas. The sensor is made of ceramic zirconia. The zirconia generates voltage from approximately
1 volt in richer conditions to 0 volt in leaner conditions.
Operation
The O2sensors produce voltages from 0 to 1 volt, depending upon the oxygen content of the exhaust gas. When a
large amount of oxygen is present (caused by a lean air/fuel mixture, can be caused by misfire and exhaust leaks),
the sensors produces a low voltage. When there is a lesser amount of oxygen present (caused by a rich air/fuel
mixture, can be caused by internal engine problems) it produces a higher voltage. By monitoring the oxygen content
and converting it to electrical voltage, the sensors act as a rich-lean switch.
The oxygen sensors are equipped with a heating element that keeps the sensors at proper operating temperature
during all operating modes. Maintaining correct sensor temperature at all times allows the system to enter into closed
loop operation sooner. Also, it allows the system to remain in closed loop operation during periods of extended idle.
ON-VEHICLE SERVICE
BESM030018
03–218Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Upstream Oxygen Sensor
The input from the upstream heated oxygen sensor tells the Engine Control Module (ECM) the oxygen content of the
exhaust gas. Based on this input, the ECM fine tunes the air-fuel ratio by adjusting injector pulse width.
Downstream Oxygen Sensor
The downstream heated oxygen sensor signal is used to detect catalytic convertor deterioration. As the convertor
deteriorates, the signal from the downstream sensor begins to match the upstream sensor signal except for a slight
time delay. By comparing the downstream heated oxygen sensor signal to the signal from the upstream sensor, the
ECM calculates catalytic convertor efficiency. This calculation is also used to establish the upstream O2 goal voltage
(switching point).
Removal & Installation - Upstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the upstream oxygen sensor (1).(Tighten: Upstream oxygen sensor to 45 N·m)
4. Installation is in the reverse order of removal.
Installation Notes:
• Before installing the oxygen sensor, coat the threads with rust inhibiting lubricant.
Removal & Installation - Downstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the downstream oxygen sensor (2).
(Tighten: Downstream oxygen sensor to 45 N·m)
ON-VEHICLE SERVICE
BESM030017
BESM030017
03
03–219Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. Installation is in the reverse order of removal.
Installation Notes:
• Before installing the oxygen sensor, coat the threads with rust inhibiting lubricant.
Crankshaft Position (CKP) Sensor
Description
The Crankshaft Position (CKP) sensor is located on the flywheel shell facing the gear teeth of the signal plate. It
detects the fluctuation of the engine revolution. The sensor consists of a permanent magnet and induction coil.
Operation
The crankshaft sensor is made of a toothed metal disk mounted on the crankshaft and a stationary detector that
covers a magnetic coil that the current passes through. As the metal teeth move past the coil, its magnetic field is
disturbed. This causes a stream of pulses in the current. The Engine Control Module (ECM) can calculate the speed
of the engine from the crankshaft’s frequency of pulses
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the CKP sensor electrical connector.
3. Remove the CKP sensor retaining bolt (1) and
remove the CKP sensor.
(Tighten: Crankshaft position sensor retaining bolt
to 10 N·m)
4. Installation is in the reverse order of removal.
Camshaft Position (CMP) Sensor
Description
The Camshaft Position (CMP) sensor senses the protrusion of inlet valve cam sprocket to identify a particular cyl-
inder. The CMP sensor senses the piston position. When the Crankshaft Position (CKP) sensor becomes inoperative,
the CMP sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
The sensor consists of a permanent magnet and Hall IC.
ON-VEHICLE SERVICE
LTSM030036
03–220Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Operation
When engine is running, the high and low parts of the teeth causes the gap with the sensor to change. The changing
gap causes the magnetic field near the sensor to change. Due to the changing magnetic field, the voltage from the
sensor changes. The Engine Control Module (ECM) detects the voltage signal and identify piston position and cyl-
inder timing.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the CMP sensor electrical connector.
3. Remove the CMP sensor (1) retaining bolt.(Tighten: Camshaft position sensor retaining bolt to
7 N·m)
4. Pull the CMP sensor up and take out of the cylin- der head cover.
5. Installation is in the reverse order of removal.
Vehicle Speed Sensor
Description
The vehicle speed sensor is mounted to the transaxle housing.
Operation
The vehicle speed sensor generates a signal sent to the Engine Control Module (ECM) and the Transaxle Control
Module (TCM) utilize to perform engine and transaxle functions.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the vehicle speed sensor connector.
3. Remove the vehicle speed sensor mounting bolt (1).
(Tighten: Vehicle speed sensor mounting bolt to 10
N·m)
4. Remove the vehicle speed sensor carefully.
5. Installation is in the reverse order of removal.
Accelerator Sensor
Description
The accelerator sensor is located on the right front crossbeam.
ON-VEHICLE SERVICE
BESM030016
BESM030024
03
03–221Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Operation
The accelerator sensor monitors the road conditions. It sends a signal to the ECM, the ECM determines if a possible
misfire condition exists.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the accelerator sensor electrical con-nector.
3. Remove the accelerator sensor (1).
4. Installation is in the reverse order of removal.
Manifold Absolute Pressure Sensor - 1.6L
Description
The Manifold Absolute Pressure (MAP) sensor, is mounted to the front of the engine on the intake manifold.
Operation
The MAP sensor monitors the pressure in the intake manifold. The pressure in the manifold moves a diaphragm
connected to resistors which alter their resistance values. The output voltage of the MAP sensor signals the ECM
about the pressure in the intake manifold.
Removal & Installation
1. Disconnect the negative battery cable.
ON-VEHICLE SERVICE
LTSM030030
03–222Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2. Disconnect the MAP sensor electrical connector.
3. Remove the MAP sensor mounting bolt (1).(Tighten: MAP sensor mounting bolt to 6 N·m)
4. Remove the MAP sensor.
5. Installation is in the reverse order of removal.
Air Flow Sensor - 1.8L
Description
The air flow sensor is placed in the air intake hose. The air flow sensor measures the intake flow rate by measuring
a part of the entire intake flow. The air flow sensor converts the amount of air drawn into the engine into a voltage
signal. The Engine Control Module (ECM) needs to know intake air volume to calculate engine load. This is neces-
sary to determine how much fuel to inject.
Operation
The air flow sensor controls the temperature of the hot wire to a certain amount. The heat generated by the hot wire
is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the electric current
supplied to the hot wire is changed to maintain the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this voltage signal change.
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the air flow sensor electrical connector.
ON-VEHICLE SERVICE
LTSM030037
03
03–223Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. For 2.0L engine, remove the air flow sensor retain-ing bolts (1).
(Tighten: Air flow sensor retaining bolts to 5 N·m)
5. Pull sensor up and take out of the air cleaner case.
6. Installation is in the reverse order of removal.
Accelerator Pedal Position Sensor
Description
The Accelerator Pedal Position (APP) sensor is located inside the accelerator pedal. The accelerator pedal position
sensor can not be disassembled by itself. The accelerator pedal must be replaced as a unit.
Operation
The accelerator pedal position (APP) sensor on the accelerator pedal works according to the Hall principal. the sen-
sor is integrated into the pedal lever axis. It consists of a shaft with a ring magnet. This rotates in a printed circuit
board with a stator in the fixed Hall elements. This produces a change in the voltage. The accelerator pedal position
sensor is supplied with 5 V from the Engine Control Module (ECM). The information regarding accelerator position is
supplied to the ECM by means of two voltages.
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the instrument panel lower trim panel.
ON-VEHICLE SERVICE
BESM030029
03–224Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3. Disconnect the APP sensor electrical connector (2).
4. Remove the three APP sensor mounting bolts (1).(Tighten: APP sensor mounting bolts to 11 N·m)
5. Remove the APP sensor with the pedal.
6. Installation is in the reverse order of removal.
Electronic Throttle Control Actuator
Description
The throttle body is located on the intake manifold. It controls air into the intake manifold. The electronic throttle
control actuator consists of throttle control motor, throttle position sensor, etc. The throttle control motor is operated
by the Engine Control Module (ECM) and it opens and closes the throttle valve. The throttle position sensor detects
the throttle valve position.
Operation
Filtered air from the air cleaner enters the intake manifold through the throttle body. A throttle valve (plate) is used to
supply air for idle and driving conditions. The throttle position sensor is part the throttle body. The throttle position
sensor signal is used by the ECM to determine throttle position. The ECM controls the electronic throttle control to
meter air into the engine. This regulates engine power. The vehicle is in sense a “Drive by Wire” system.
Removal & Installation
1. Remove the engine cover.
2. Disconnect the negative battery cable.
ON-VEHICLE SERVICE
LTSM030038
03
03–225Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3. Disconnect the electronic throttle control actuatorconnector.
4. Remove two hoses on electronic throttle control actuator.
5. Remove four electronic throttle control actuator mounting bolts.
(Tighten: Electronic throttle control actuator bolts to
10 N·m)
6. Remove the throttle control actuator carefully.
7. Installation is in the reverse order of removal.
Engine Control Module (ECM)
Description
The Engine Control Module (ECM) for this model is serviced only as a complete unit.
Operation
The ECM is a pre-programmed, microprocessor-based digital computer. It regulates ignition timing, air-fuel ratio,
emission control devices, charging system, certain transmission features, speed control, air conditioning compressor
clutch engagement and idle speed. The ECM can adapt its programming to meet changing operating conditions.
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the glove box (See Instrument Panel Removal & Installation in Section 15 Body).
3. Disconnect the ECM electrical connector.
4. Remove the ECM retaining bolts (1). (Tighten: ECM retaining bolts to 10 N·m)
5. Remove the ECM.
6. Installation is in the reverse order of removal.
Installation Notes:
•
NOTE :
The Immobilizer control module must be matched to
the new ECM before the vehicle will start.
Matching Immobilizer Control Module to New
Engine Control Module (ECM)
Perform the following to match the Immobilizer control
module to the new ECM: With the X-431 scan tool, choose T11 series.
Choose immobilize.
Choose input code.
Input the safety code.
Click the small keyboard.
Click OK.
Choose Immobilizer adapt.
Choose read Immobilizer to ECM immedi-
ately.
Click OK.
ON-VEHICLE SERVICE
BESM030022
LTSM030025
03–226Chery Automobile Co., Ltd.