Chery Tiggo. Manual — part 72
ELECTRONIC ENGINE CONTROLS
03
CONTENTS
page
1.6L & 1.8L Engine Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-1
2.0L Engine Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-227
2.4L Engine Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-441
2.4L Engine Symptom Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-543
Ignition Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-565
Evaporative Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03-576
1.6L & 1.8L ENGINE CONTROLS
GENERAL INFORMATION
03-3
Description
03-3
Operation
03-3
Electronic Engine Control Input & Output
Device Failure Modes
03-4
Specifications
03-5
Special Tools
03-6
Electrical Schematics
03-9
ECM Connector Pin-Out Table
03-20
DIAGNOSIS & TESTING
03-22
Diagnostic Help
03-22
Intermittent DTC Troubleshooting
03-22
Ground Inspection
03-22
Electronic Throttle Control Actuator
Self-Learning Operation Introduction
03-23
Diagnostic Trouble Code (DTC) List
03-23
ECM Power Supply and Ground Circuit
Test
03-28
Power Supply and Ground Circuit
03-28
Diagnostic Trouble Code (DTC) Tests
03-35
P0016 - Camshaft Position-Crankshaft
Position Correlation Error
03-35
P0031 - O
2
Sensor 1 Heater Control
Circuit Low
03-45
P0032 - O
2
Sensor 1 Heater Control
Circuit High
03-51
P0102 - Mass Or Volume Air Flow
Circuit Low Input
03-57
P0103 - Mass Or Volume Air Flow
Circuit High Input
03-63
P0105 - Manifold Absolute Pressure/
Barometric Pressure Circuit, P0106 -
Manifold Absolute Pressure Or
Barometric Pressure Range/
Performance
03-68
P0107 - Manifold Absolute Pressure Or
Barometric Pressure Low Input,
P0108 - Manifold Absolute Pressure Or
Barometric Pressure High Input
03-73
P0112 - Intake Air Temperature Circuit
Low Input
03-78
P0113 - Intake Air Temperature Circuit
High Input
03-84
P0117 - Engine Coolant Temperature
Circuit Low Input
03-91
P0118 - Engine Coolant Temperature
Circuit High Input
03-96
P0122 - Throttle Position Sensor A
Circuit Low Input
03-101
P0123 - Throttle Position Sensor A
Circuit High Input
03-107
P0132 - O
2
Sensor 1 Circuit High
Voltage
03-112
P0171 - Fuel Trim System Too Lean
03-118
P0172 - Fuel Trim System Too Rich
03-131
P0201 - Cylinder 1 - Injector Circuit,
P0202 - Cylinder 2 - Injector Circuit,
P0203 - Cylinder 3 - Injector Circuit,
P0204 - Cylinder 4 - Injector Circuit
03-142
P0221 - Throttle Position Sensor B
Performance
03-149
03
P0261 - Cylinder 1 Injector Circuit Low,
P0264 - Cylinder 2 Injector Circuit Low,
P0267 - Cylinder 3 Injector Circuit Low,
P0270 - Cylinder 4 Injector Circuit Low
03-157
P0262 - Cylinder 1 Injector Circuit High,
P0265 - Cylinder 2 Injector Circuit High,
P0268 - Cylinder 3 Injector Circuit High,
P0271 - Cylinder 4 Injector Circuit High
03-164
P0321 - Distributor Engine Speed In
Phase Circuit Performance
03-171
P0324 - Knock Control System Error
03-177
P0343 - Camshaft Position Sensor
Circuit High Input
03-181
P0444 - Evaporative Emission System
Purge Control Valve Circuit Open
03-187
P0506 - Idle Control System RPM
Lower Than Expected
03-191
P0601 - Internal Control Module
Memory Check Sum Error, P0604 -
Internal Controller Module Random
Access Memory (RAM) Error, P0605 -
Internal Controller Module ROM Test
Error, P0606 - ECM Processor
03-193
P0602 - ECM Programming Error
03-195
P0645 - A/C Clutch Relay Circuit
03-197
P1545 - Throttle Position Control
Malfunction
03-202
P2138 - Pedal Position Sensor
Performance
03-210
ON-VEHICLE SERVICE
03-217
Engine Coolant Temperature (ECT)
Sensor
03-217
Description
03-217
Operation
03-217
Removal & Installation
03-217
Knock Sensor
03-218
Description
03-218
Operation
03-218
Removal & Installation
03-218
Oxygen Sensor
03-218
Description
03-218
Operation
03-218
Upstream Oxygen Sensor
03-219
Downstream Oxygen Sensor
03-219
Removal & Installation - Upstream
Oxygen Sensor
03-219
Removal & Installation - Downstream
Oxygen Sensor
03-219
Crankshaft Position (CKP) Sensor
03-220
Description
03-220
Operation
03-220
Removal & Installation
03-220
Camshaft Position (CMP) Sensor
03-220
Description
03-220
Operation
03-221
Removal & Installation
03-221
Vehicle Speed Sensor
03-221
Description
03-221
Operation
03-221
Removal & Installation
03-221
Accelerator Sensor
03-221
Description
03-221
Operation
03-222
Removal & Installation
03-222
Manifold Absolute Pressure Sensor -
1.6L
03-222
Description
03-222
Operation
03-222
Removal & Installation
03-222
Air Flow Sensor - 1.8L
03-223
Description
03-223
Operation
03-223
Removal & Installation
03-223
Accelerator Pedal Position Sensor
03-224
Description
03-224
Operation
03-224
Removal & Installation
03-224
Electronic Throttle Control Actuator
03-225
Description
03-225
Operation
03-225
Removal & Installation
03-225
Engine Control Module (ECM)
03-226
Description
03-226
Operation
03-226
Removal & Installation
03-226
GENERAL INFORMATION
Description
The Engine Control Module (ECM) consists of a microcomputer and electrical connectors containing circuits for signal
input, output, power supply and ground. The ECM controls the engine functions.
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
• Refrigerant Pressure Sensor
• Camshaft Position (CMP) Sensor
• Crankshaft Position (CKP) Sensor
• Engine Coolant Temperature (ECT) Sensor
• Manifold Absolute Pressure (MAP) Sensor (1.6L)
• Air Flow Sensor (1.8L)
• Throttle Position Sensor (Integral with Electronic Throttle Control Actuator)
• Power Steering Switch
• Accelerator Pedal Position (APP) Sensor
• Knock Sensor
• Oxygen Sensor (Upstream & Downstream)
• Vehicle Speed Sensor
• Clutch Pedal Switch (Manual transaxle only)
ECM Outputs
• Canister Control Valve
• Fuel Injectors
• Fuel Pump Relay
• Electronic Throttle Control Actuator
• Ignition Coil
• A/C Compressor
• Cooling Fan
• Oxygen Sensor Heater (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
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
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