coolant CHERY TIGGO 2009 Service Manual PDF

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 2.4L ENGINE CONTROLS
GENERAL INFORMATION03-442
Description 03-442
Operation 03-442
Electronic Engine Control Input & Output
Device Failure Modes 03-443
Specifications 03-444
Special Tools 03-445
Electrical Schematics 03-447
ECM Connector Pin-Out Table 03-457
DIAGNOSIS & TESTING03-458
Diagnostic Help 03-458
Diagnostic Logic 03-458
Ground Inspection 03-459
Diagnostic Tools 03-459
Diagnostic Trouble Code (DTC) List 03-461
ECM Power Supply and Ground Circuit
Test 03-462
Power Supply And Ground Circuit
Diagnostic Check 03-462
Diagnostic Trouble Code (DTC) Tests 03-469
11 - Oxygen Sensor 03-469
12- Air Flow Sensor 03-476
13 - Air Temperature Sensor 03-482
14 - Throttle Position Sensor 03-487
21 - Coolant Temperature Sensor 03-493
22 - Crankshaft Position Sensor 03-498
23 - Camshaft Position Sensor 03-504
25 - Atmosphere Pressure Sensor 03-510
31 - Knock Sensor 03-515
41 - Injector 03-519
44 - Ignition Signal 03-525
ON-VEHICLE SERVICE03-531
Engine Coolant Temperature (ECT)
Sensor 03-531
Description 03-531
Operation 03-531
Removal & Installation 03-531
Coolant Temperature Sensor (For
Instrument Cluster) 03-532
Description 03-532
Operation 03-532
Removal & Installation 03-532Knock Sensor
03-533
Description 03-533
Operation 03-533
Removal & Installation 03-533
Oxygen Sensor 03-533
Description 03-533
Operation 03-533
Upstream Oxygen Sensor 03-534
Downstream Oxygen Sensor 03-534
Removal & Installation - Upstream
Oxygen Sensor 03-534
Removal & Installation - Downstream
Oxygen Sensor 03-535
Camshaft Position (CMP) Sensor 03-536
Description 03-536
Operation 03-536
Removal & Installation 03-536
Air Flow Sensor 03-537
Description 03-537
Operation 03-537
Removal & Installation 03-537
Throttle Control Actuator 03-538
Description 03-538
Operation 03-538
Removal & Installation 03-538
Engine Control Module (ECM) 03-539
Description 03-539
Operation 03-539
Removal & Installation 03-539
Throttle Position Sensor (TPS) 03-540
Description 03-540
Operation 03-540
Removal & Installation 03-540
Idle Air Control (IAC) Motor 03-541
Description 03-541
Operation 03-541
Removal & Installation 03-541
Crankshaft Position (CKP) Sensor 03-542
Description 03-542
Operation 03-542
Removal & Installation 03-542
03
03–441Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
The Engine Control Module (ECM) consists of a microcomputer and connectors for signal input and output and for
power supply. The ECM controls the engine.
The following are the input and output components monitored by the ECM. The monitored functions include compo-
nents from the engine, ignition, transaxle, air conditioning, or any other ECM supported subsystem.
ECM Inputs
•Brake Switch Sensor
• Camshaft Position (CMP) Sensor
• Crankshaft Position (CKP) Sensor
• Engine Coolant Temperature (ECT) Sensor
• Air Flow Sensor
• Coolant Temperature Sensor (For Instrument Cluster)
• Throttle Position Sensor (Integral with Electronic Throttle Control Actuator)
• Power Steering Switch
• Knock Sensor
• Oxygen Sensor (Upstream & Downstream)
• Clutch Pedal Switch (Manual transmission only)
ECM Outputs
• Canister Control Valve
• Fuel Injectors
• Fuel Pump Relay
• Electronic Throttle Control Actuator
• Ignition Coil
• A/C Compressor
• Cooling Fan
• Oxygen Sensor heating coil (Upstream & Downstream)
Operation
The ECM monitors components and circuits and tests them in various ways depending on the hardware, function,
and type of signal. For example, analog inputs such as throttle position or engine coolant temperature are typically
checked for opens, shorts and out-of-range values. This type of monitoring is carried out continuously. Some digital
inputs like vehicle speed or crankshaft position rely on rationality checks - checking to see if the input value makes
sense at the current engine operating conditions. These types of tests may require monitoring several components
and can only be carried out under appropriate test conditions.
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.
03–442Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine NUMBER ITEMFAILURE MODECORRECTION
10 Fuel Injector •
Unstable idle.
• Lack of engine power.
• Poor acceleration.
• Engine will not start.
• Plugged injector. Replace
11 TPS•
Poor acceleration.
• The MIL light will turn on. Replace
12 EVAP•
The engine base fuel closed-loop control self-learning will be
shut off.
• The engine idle air control self-learning will be shut off.
• Unstable idle or high idle. Replace
13 Fuel Pump •
Noisy fuel pump operation.
• Poor acceleration.
• Engine will not start. Replace
14 MAP•
Poor acceleration.
• Unstable idle.
• Rough engine operation. Replace
15 IAT•
Intake air temperature will be equal to the coolant
temperature. Replace
16 Cooling Fan •
High engine temperature.
• Poor air conditioner performance. Replace
17 Accelerator
Sensor •
Misfire
• Poor driving capability.
• Rough engine operation. Replace
Specifications
Torque Specifications
DESCRIPTION
TORQUE (N·m)
Engine Coolant Temperature Sensor 20
Knock Sensor 20
Oxygen Sensors 45
Crankshaft Position Sensor 20
Camshaft Position Sensor 10
Air Flow Sensor 8
Engine Control Module 10
Electronic Throttle Control Actuator 10
Vehicle Speed Sensor 10
Coolant Temperature Sensor (For Instrument Cluster) 14
GENERAL INFORMATION
03–444Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ECM Connector Pin-Out Table
ECM PIN-OUT TABLE
PINCIRCUIT IDENTIFICATION PINCIRCUIT IDENTIFICATION
1 Injector 1 39-
2 Injector 3 40-
3 -41A/C Pressure Switch
4 Idle Air Control 1 42-
5 Idle Air Control 3 43-
6 EGR Control 44-
7 Lan 1 45-
8 Fuel Pump Relay 46-
9 EVAP Control 47-
10 Ignition Coil 1 48Diagnostic Link K
11 -4 9 -
12 Switched Supply Voltage 50RPM
13 GND 51Lan 2
14 Injector 2 52Upstream Oxygen Sensor Heater
15 Injector 4 53-
16 -54Diagnostic Link K
17 Idle Air Control 2 55Ignition Switch Start
18 Idle Air Control 4 56Intake Air Temperature Sensor
19 Air Flow Sensor 57-
20 -58 -
21 Cooling Fan Control 59Downstream Oxygen Sensor
22 A/C Relay 60Upstream Oxygen Sensor
23 Ignition Coil 2 61-
24 -62Knock Sensor
25 Switched Supply Voltage 63-
26 GND 64Continuous Supply Voltage
27 -65Regulated Sensor Supply
28 -66Ignition Switch On
29 Generator G 67 Engine Coolant Temperature Sensor
30 -68Throttle Position Sensor
31 -69Atmosphere Pressure Sensor
32 MIL Lamp 70Speed In
33 Power Steering Switch 71Idle Position Switch
34 Main Relay 72Camshaft Position Sensor
35 -73Crankshaft Sensor
36 -74Air Flow Sensor
37 Generator FR 75P/N Switch
38 -76Sensor (GND)
GENERAL INFORMATION
03
03–457Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Trouble Code (DTC) List
DTCDTC DEFINITION
11 Oxygen Sensor
12 Air Flow Sensor
13 Air Temperature Sensor
14 Throttle Position Sensor
21 Coolant Temperature Sensor
22 Crankshaft Position Sensor
23 Camshaft Position Sensor
24 Speed Sensor
25 Atmosphere Pressure Sensor
31 Knock Sensor
36 Ignition Signal Terminal
41 Injector
44 Ignition Signal
54 Immobilizer Communication
61 Electronic 4AT Communication
64 ALT FR Signal
DIAGNOSIS & TESTING
03
03–461Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK MAF SENSOR REFERENCE CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
AIR FLOW SENSOR
TERMINAL ECM TERMINAL
37
4
• Continuity should exist.
• Check harness for short to power or short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open or short to power or short to ground in harness or connec-
tors.
7.CHECK MAF SENSOR
• Connect air flow sensor connector.
• Connect ECM connector.
• With digital multimeter and the X-431, check sensor signal output data and data stream value.
CAUTION:
To new vehicle (less than 500 km mileage), the sensor output frequency is 10 % higher than stan-
dard value.
CHECK ITEM CHECK CONTENT NORMAL VALUE
Air flow sensor •
Engine coolant
temperature: 80 - 95°C
• Lamp and all other
condition: OFF
• Transaxle: Neutral •
Engine is running
• Warm-up running
• Idle 19-45HZ
• Engine is running: 2,500
RPM 72 - 112 HZ
• Engine is accelerating Frequency direct
proportion with speed
DIAGNOSIS & TESTING
03
03–479Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 21 - Coolant Temperature Sensor
DIAGNOSIS & TESTING
LTSMW030005T
03
03–493Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINALNO. ITEM
CONDITION DATA (DC
VOLTAGE)
67 Engine Coolant
Temperature (ECT) sensor Ignition switch: ON ECT: 0°C
3.2 - 3.8 V
ECT: 20°C 2.3 - 2.9 V
ECT: 40°C 1.3 - 1.9 V
ECT: 80°C 0.3 - 0.9 V
76 Sensor (GND) -Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
21 Coolant temperature
sensor •
Ignition switch:
ON position for 60
seconds
• Engine: Running •
Signal output is
above 4.6 V for 4
seconds
continuously
(amount to -45°C
engine coolant
temperature).
• Signal output is
below 0.1 V for 4
seconds
continuously
(amount to 145°C
engine coolant
temperature). •
Engine Coolant
Temperature (ECT)
sensor
• Harness or
connectors
• ECM
• Ignition switch:
ON
• Engine speed is
above 500 RPM •
Signal output raise
from below 1.6 V to
above 1.6 V
(amount to 40°C
engine coolant
temperature).
• Signal output is
above 1.6 V for 5
minutes.
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ECM.
• Start engine and warm it to normal operating temperature, then select view DTC and data stream.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information.
NOTE :
Before performing the following procedure, make sure that the ECM connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03–494Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK GROUND CONNECTION
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect the ground connection E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-
subishi 2.4L Engine) in Section 16 Wiring).
Is the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connection.
2.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR ELECTRICAL CONNECTOR
• Disconnect the ECT (1) electrical connector.
• 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.
DIAGNOSIS & TESTING
LTSM030007
03
03–495Chery Automobile Co., Ltd.