2009 CHERY TIGGO sensor

Downloaded from www.Manualslib.com manuals search engine 8.CHECK TPS
• Connect all harness connectors disconnected.
• Turn ignition switch on.
• Check voltage between ECM terminals 54 (TPS1) and ground, terminal 38 (TPS2) and ground under the follow-
ing conditions:
TPS
TERMINAL NO. ITEM
CONDITION VOLTAGE
(DC
VOLTAGE)
5 Electronic
throttlecontrol
actuator (TPS2)
Ignition
switch:
ON •
Engine
stopped
•
Accelerator
pedal:
Fully
released 4.24 V
• Engine
stopped
•
Accelerator
pedal:
Fully
depressed 0.72 V
6 Electronic
throttlecontrol
actuator (TPS1) •
Engine
stopped
•
Accelerator
pedal:
Fully
released 0.74 V
• Engine
stopped
•
Accelerator
pedal:
Fully
depressed 4.62 V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace TPS circuits for open or short.
If the TPS circuits are normal, replace electronic throttle control actuator. Perform throttle valve posi-
tion self-learning.
9.CHECK APP SENSOR GROUND CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between APP sensor terminal 2 and ECM terminal 35, APP sensor terminal 5 and
ECM terminal 36.
• Continuity should exist.
• Also check harness for short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to power in harness or connectors.
DIAGNOSIS & TESTING
03–418Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 10.CHECK APP SENSOR CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between APP sensor 1 terminal 4 and ECM terminal 16, APP sensor 2 terminal 1 and
ECM terminal 40.
• Continuity should exist.
• Also check harness for short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to power or short to ground in harness or connectors.
11 .CHECK APP SENSOR
• Connect all harness connectors disconnected.
• Turn ignition switch on.
• Check voltage between ECM terminals 16 (APP sensor 1 signal), 40 (APP sensor 2 signal) and ground under
the following conditions:
TERMINAL NO. ITEM CONDITION DATA (DC
VOLTAGE)
16 Accelerator Pedal
Position sensor
Turn ignition switchon •
Engine stopped
• Accelerator pedal:
Fully released 0.72 - 0.74 V
• Engine stopped
• Accelerator pedal:
Fully depressed 3.95 V
40 Accelerator Pedal
Position sensor •
Engine stopped
• Accelerator pedal:
Fully released 0.36 - 0.37 V
• Engine stopped
• Accelerator pedal:
Fully depressed 1.97 V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace accelerator pedal assembly.
Perform Accelerator pedal position self-learning.
12.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P2138 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–419Chery 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 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 series 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
03–427Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6. Installation is in the reverse order of removal.
NOTE :
After installing 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.
The knock sensor contains 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 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 and isolate 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 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.
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
03–428Chery 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
03–429Chery 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
When the engine is running, the high and low parts of the teeth cause 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) receives the voltage signal and detects the fluctuation
of the engine revolution.
Removal & Installation
1. Disconnect and isolate 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.
ON-VEHICLE SERVICE
LTSM030036
03–430Chery 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 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 retaining bolt (1).(Tighten: Camshaft position sensor retaining bolt to
7 N·m)
4. Remove CMP sensor.
5. Pull sensor up out of the cylinder head cover.
6. Installation is in the reverse order of removal.
Air Flow Sensor
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
BESM030016
03
03–431Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4. Remove the air flow sensor retaining 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 Sensor
Description
The accelerator sensor is located on the right front crossbeam.
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 connect.
3. Remove the accelerator sensor (1).
4. Installation is in the reverse order of removal.
Speed Control System
Description
The Speed Control System allows a driver to keep the vehicle at a predetermined speed without depressing the
accelerator pedal. The driver can set vehicle speed in advance between approximately 25 km/h and 130 km/h.
ECM controls throttle angle of electronic throttle control actuator to regulate engine speed.
If any malfunction occurs in the Speed Control System, it automatically deactivates the system and the cruise indi-
cator flashes.
ON-VEHICLE SERVICE
BESM030029
LTSM030030
03–432Chery Automobile Co., Ltd.