Chery Tiggo. Manual — part 182
2.4L ENGINE CONTROLS
GENERAL INFORMATION
03-442
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 & TESTING
03-458
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 SERVICE
03-531
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
03-532
Knock 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
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.
Electronic Engine Control Input & Output Device Failure Modes
NUMBER
ITEM
FAILURE MODE
CORRECTION
1
CKP
• Engine is hard to start.
• The engine RPM will be limited after the engine starts.
• The highest RPM is less than 3800.
• Excessive exhaust emissions.
• No ignition signal to the ECM.
• The tachometer does not work.
• Rough engine operation.
Replace
2
CMP
• The fuel injector ON time may vary from 720 degrees to 360
degrees.
• The sensor output is not correct, the MIL light will turn on
when with the second revolution after the engine starts.
• Engine is hard to start.
• The highest RPM is less than 4000.
Replace
3
APPS
• The MIL light will turn on.
• Poor acceleration.
• The engine RPM will be limited after the engine starts.
Replace
4
ECT
• Engine hard to start when cold.
• Engine hard to start when hot.
• Poor driving capability.
• If the sensor circuit is shorted to power, the engine will run
under the default values.
• The temperature gauge indicates too high.
• The temperature gauge indicates too low.
• The cooling fan operates continuously on high speed.
• The high temperature warning lamp will flash when the IP
indicates low temperature.
Replace
5
MAF
• The cooling fan will operate for approximately 60 seconds on
high speed after the ignition switch is turned off.
• Poor acceleration.
• Poor driving capability.
Replace
6
O
2
Sensor
• Poor fuel economy.
• Excessive exhaust emissions.
• Sluggish acceleration.
• Poor driving capability.
Replace
7
Knock Sensor
• The engine produces an engine knock.
• Overheated engine.
• Excessive exhaust emissions.
• Poor fuel economy.
• Lack of engine power.
• Internal engine damage.
Replace
8
ECM
• Unstable engine idle.
• Poor acceleration.
• Unable to start.
• High engine idle.
• The engine exhaust exceeds emission standards.
• Engine is hard to start.
• Air conditioner does not operate.
• Fuel injector control failure.
• Engine stalls out.
Replace
9
Ignition Coil
• Unstable idle.
• Lack of engine power.
• Poor fuel economy.
• Excessive exhaust emissions.
• Weak spark.
Replace
GENERAL INFORMATION
03
NUMBER
ITEM
FAILURE MODE
CORRECTION
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
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