CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 2.CHECK ENGINE START
• Start the engine.
Is any cylinder ignited?
Ye s>>If with the X-431, go to the next step.
If without the X-431, go to step 3.
No
>>Go to step 4.
3.PERFORM ACTIVE TEST FUNCTION
• Select ACTIVE TEST menu.
• Perform ignition active test (If the X-431 has the function).
• Make sure that each test produces a momentary engine speed drop.
Is the check result normal?
Ye s>>Inspection end.
No
>>Go to step 4.
4.CHECK FUNCTION OF IGNITION
• Let engine run at 3000 RPM.
• Read voltage signal between ECM terminals 10, 23 and ground.
IGNITION
COIL
TERMINAL NO. ITEM CONDITION
DATA (DC
VOLTAGE)
10 Ignition coil
1 terminal 3 Engine:
3000 RPM 0.3 - 3.0 V
23 Ignition coil
2 terminal 3 0.3 - 3.0 V
• If with check tool-timing mark lamp, check the actual ignition time.
CHECK ITEM CONTENTNORMAL VALUE
Ignition coil with power transistor •
Engine: Warm-up
condition
• Timing lamp (For check
the actual ignition time) Engine: Idle
2 - 18° BTDC
Engine: 2500 RPM 18 - 38° BTDC
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
DIAGNOSIS & TESTING
03
03–527Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK IGNITION COIL ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the ignition coil electrical connector (1).
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
6.CHECK IGNITION COIL POWER SUPPLY CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch on.
• Check supply voltage between ignition coil terminal
1 and ground in the ignition coil electrical connec-
tor.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 8.
No
>>Go to the next step.
7.DETECT MALFUNCTIONING PART
• Check the following:
Fuse 15
Front fuse and relay box B8
Harness connectors A-102, E-105
Harness open or short between ignition coil and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts.
DIAGNOSIS & TESTING
LTSM030017
LTSMD030022
03–528Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK IGNITION COIL GROUND CIRCUIT FOR AN OPEN
• Turn ignition switch off.
• Check harness continuity between ignition coil terminal 2 and ground.
• Continuity should exist.
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
9.DETECT MALFUNCTIONING PART
• Check harness for an open or short between ignition coil and ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open or short in harness or connectors.
10.CHECK IGNITION COIL INPUT SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Disconnect ECM connector.
• Check harness continuity between ECM terminal 10, 23 and ignition coil E-069, E-070, terminal 3.
• Continuity should exist.
• Check harness for short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair harness in harness or connectors.
11 .CHECK IGNITION COIL
• Check power transistor conducting state.
• Use simulation resistance meter.
• Connect the positive lead of the simulation resistance meter to the terminal of the power transistor.
CAUTION:
This test should be completed quickly (in 10 seconds), to prevent ignition coil from burning and
power transistor from damaging.
•Also check resistance between ignition coil terminals as table shown.
• Also check ignition coil signal output.
DIAGNOSIS & TESTING
03
03–529Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine TERMINAL NO. RESISTANCE(25°C)
1 & 2 Except 0 or
1&3 Except 0
2&3
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace the ignition coil.
12.CHECK HIGH TENSION CABLE RESISTANCE
• Check if there is crack exist.
• Check if the limited resistance value is 22 k.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace high tension cable.
13.CHECK SPARK PLUG
• Remove spark plug high tension cable.
• Remove spark plug.
• Check if there is burned electrode or damaged nonconductor. And check if the burned mark is even.
• Check if there is carbon deposit exist. Use steel wire or tool to eliminate it.
• Check if the clearance meet standard. The standard is: 1.1 mm.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace or eliminate or adjust the spark plug.
14.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 44 still present?
Ye s>>Replace the ECM.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03–530Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Engine Coolant Temperature (ECT) Sensor
Description
The Engine Coolant Temperature (ECT) Sensor is beside the thermostat. The ECT Sensor is a negative thermal
coefficient sensor.
Operation
The ECT sensor provides an input signal to the 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, and radiator fan on/off times.
Removal & Installation
1. Disconnect and isolate the negative battery cable.
2. Release the coolant system pressure.
WARNING!
Never remove the radiator 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 pres-
sure 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 electrical connector.
CAUTION:
Remove the coolant temperature sensor when the engine is cold.
03
03–531Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. Remove the engine coolant temperature sensor(1).
(Tighten: Engine coolant temperature sensor to 20
N·m).
5. Discard the O-ring.
6. Installation is in the reverse order of removal. NOTE: Replace a new O-ring when installing.
Coolant Temperature Sensor (For Instrument Cluster)
Description
The coolant temperature sensor (for instrument cluster) is located on the water outlet fitting. It is bimetallic strip struc-
ture.
Operation
The coolant temperature sensor (for instrument cluster) provides an input to the instrument cluster. With the coolant
temperature changes the bimetallic strip will curve complete the circuit and the temperature gauge will change.
Removal & Installation
1. Disconnect and isolate the negative battery cable.
2. Disconnect the coolant temperature sensor (for
instrument cluster) electrical connector.
3. Remove the coolant temperature sensor (1) (for instrument cluster).
(Tighten: Coolant temperature sensor (for instru-
ment cluster) to 14 N·m)
ON-VEHICLE SERVICE
LTSM030007
LTSM030002
03–532Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. Installation is in the reverse order of removal.
CAUTION:
Before removing the coolant temperature sensor (for instrument cluster), release the coolant pres-
sure and make sure the engine is cold.
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 ECM. In response, the
ECM retards ignition timing for all cylinders by a scheduled 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 vibration increases, the knock sensor output voltage also
increases.
The voltage signal produced by the knock sensor increases with the amplitude of vibration. The ECM receives an
input knock sensor voltage signal. If the signal rises above a predetermined level, the ECM will store that value in
memory and retard ignition timing to reduce engine knock. If the knock sensor voltage exceeds a present value, the
ECM retards ignition timing for all cylinders. It is not a selective cylinder retard.
The ECM ignores knock sensor input signal during engine idle conditions. Once the engine speed exceeds a spec-
ified value, knock retard is allowed.
Removal & Installation
1. Disconnect and isolate the negative battery cable.
2. Disconnect the knock sensor electrical connector.
3. Remove the knock sensor retaining bolt (1) andremove 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 O2 sensors 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.
ON-VEHICLE SERVICE
LTSM030011
03
03–533Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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.
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.
ON-VEHICLE SERVICE
LTSM030004
03–534Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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 (1).(Tighten: Downstream 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.
ON-VEHICLE SERVICE
LTSM030008
03
03–535Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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.
Operation
When engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing
gap cause 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 camshaft position sensor electrical connector from the wiring harness connector.
3. Remove the camshaft position sensor retaining bolt(1).
(Tighten: Camshaft position sensor retaining bolt to
10 N·m)
4. Remove camshaft position sensor.
5. Pull sensor up out of the cylinder head cover.
6. Installation is in the reverse order of the removal.
ON-VEHICLE SERVICE
LTSM030005
03–536Chery Automobile Co., Ltd.