CHERY TIGGO 2009 Service Repair Manual

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
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03–457Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Diagnostic Help
1. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.
2. If the Diagnostic Trouble Code (DTC) cannot be deleted, it is a current fault.
3. Use a digital multimeter to perform voltage readings on the Electronic Fuel Injection (EFI) system.
4. The scan tool connects to the Data Link Connector (DLC) and communicates with the ECM.
5. If the failure is intermittent perform the following:•Check for loose connectors.
• Look for any chafed, pierced, pinched, or partially broken wires.
• Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
• Look for the data to change or for the DTC to reset during the wiggle test.
• Look for broken, bent, pushed out or corroded terminals.
• Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as
damage or foreign material.
6. Remove the ECM from the troubled vehicle and install in a new vehicle and test. If the DTC can not be deleted, the ECM is malfunctioning. If the DTC can be deleted, return the ECM to the original vehicle.
Diagnostic Logic
If the DTC can not be deleted, it is a current failure.
If the DTC can be deleted, it is an intermittent incident. In many cases, the malfunction resolves itself (the part or
circuit function returns to normal without intervention). It is important to realize that the symptoms described in the
customer’s complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent causes of inter-
mittent incidents occurrences is poor electrical connections. Because of this, the conditions under which the incident
occurred may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not
indicate the specific malfunctioning area.
Check if it is because of the loosening of cable joint.
Look for any chafed, pierced, pinched, or partially broken wires.
Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Look for broken, bent, pushed out or corroded terminals.
Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as damage,
foreign material.
Refer to any Technical Service Bulletins that may apply.
DIAGNOSTIC REFERENCE
•Check ground terminals for corroding or loose connection. Refer to Ground Inspection.
• Search for electrical incident. Refer to Diagnosis for an Electrical Incident.
• Check connector terminals. Refer to How to Check Terminal.
DURING ENGINE CHECKS AND REPAIRS USE CAUTION NOT TO HARM THE ENGINE MECHANICAL SYSTEM
• Check cylinder pressure.
• Check ignition timing.
• Check fuel system pressure.
• Check the EVAP system.
• Check for vacuum leaks.
• Check output of the TPS.
• Check the injectors for leaks.
Remove and install the doubtful ECM to a new vehicle and test it. If the DTC can not be deleted, the malfunction is
inside of ECM; if the DTC can be deleted, change the original ECM back and check it again according to above
items.
Inspect and clean all ECM, engine, and body grounds that are related to the DTC. If numerous trouble codes were
set, use a wire schematic and look for any common ground or supply circuits for any camshaft pulley DTCs inspect
for dirt/metal debris.
03–458Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Use the scan tool to perform a System Test if one applies to a failing component. A co-pilot, data recorder, and/or
oscilloscope should be used to help diagnose intermittent conditions.
CAUTION:
Before starting repairs which do not require battery power:
•Turn ignition switch off.
• Disconnect the negative battery terminal.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connec-
tions are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can become an unwanted
resistance. This added resistance can alter the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically
affect an electronically controlled circuit. A poor or corroded ground can effect the circuit. Perform the following when
inspecting a ground connection:
1. Remove the ground bolt or screw.
2. Inspect all mating surface for tarnish, dirt, rust, etc.
3. Clean as required to assure good contact.
4. Reinstall bolt or screw securely.
5. Inspect for add-onaccessories which may be interfering with the ground circuit.
6. If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are crimped to one eyelet, make
sure no excess wire insulation has been crimped creating a bad ground.
Diagnostic Tools
1. Scan Tool X-431
2. Engine Analyzer (KES-200)
3. Digital Multimeter
4. Jumper Wire
Hardware Requirements
The hardware configuration of X-431 is as follows:
DIAGNOSIS & TESTING
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03–459Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Scan Tool Configuration
ITEM NAMEDESCRIPTION
1 X-431 Main Unit To Display Operational
Buttons, Test Results, Help
Information, etc.
2 Mini-Printer To Print Test Results.
(Optional)
3 CF Card To Store Diagnostic Software
and Data
4 USB Cable To Connect CF Card
Reader/Writer and Computer
5 CF Card
Reader/Writer To Read or Write Data On
The CF Card
6 Mitsubishi-12+16
Pin Connector To Diagnose Mitsubishi
Electronic Control Systems
On Chery B11 Series
7 Fiat-3 Pin
Connector To Diagnose Vehicles With
Fiat-3 Pin Diagnostic
ConnectorITEM NAME
DESCRIPTION
8 Smart OBDII-16
Pin Connector To Diagnose Other Systems
Of Vehicle With OBDII-16
Pin Diagnostic Connector
9 Power Cord To Connect AC 100 - 240 V
Outlet and Power Adapter
10 Cigarette Lighter
Cable To Get Power From Vehicle
Cigarette Lighter
11 Battery Cable
W/Two Clips To Get Power From Vehicle
Battery
12 Power Adapter To Convert 100 - 240 V AC
Power Into 12 V DC Power
13 Main Cable To Connect The Diagnostic
Connector and Smartbox
14 Smartbox To Perform Vehicle
Diagnosis
DIAGNOSIS & TESTING
BESM030003
03–460Chery 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
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03–461Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ECM Power Supply and Ground Circuit Test
Power Supply And Ground Circuit Diagnostic Check
DIAGNOSIS & TESTING
LTSMW030003T
03–462Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
TERMINAL NO.ITEMCONDITIONDATA (DC VOLTAGE)
12 Power supply for ECM Ignition switch: ON Battery Voltage (11 - 14 V)
25
34 ECM relayIgnition switch: OFF
More than a few seconds
after turning ignition switch OFF Battery Voltage (11 - 14 V)
64 Battery All timeBattery Voltage (11 - 14 V)
66 Ignition switch Ignition switch: ON Battery Voltage (11 - 14 V)
Ignition switch: OFF Approximately 0 V
DIAGNOSIS & TESTING
03
03–463Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
LTSMW030004T
03–464Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Specification data are reference values and are measured between each terminal and ground.
TERMINAL NO.ITEMCONDITIONDATA (DC VOLTAGE)
13 ECM ground Ignition switch: ON Approximately 0 V
26 ECM ground Ignition switch: ON Approximately 0 V
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.
• Start the engine and warm it to normal operating temperature.
• With the scan tool, select view data stream.
• If the data stream is not detected, the condition is current. Go to Diagnostic Procedure Step 1.
• If the data stream is detected, the condition is intermittent (See Diagnosis & Testing Diagnostic Help in Section
03 Electronic Engine Controls).
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.INSPECTION START
• Start engine.
Is engine running?
Ye s>>Go to step 8.
No
>>Go to step 2.
2.CHECK ECM POWER SUPPLY CIRCUIT - (1)
• Turn ignition switch OFF and then ON position.
• Check voltage between ECM terminal 66 and
ground.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 5.
No
>>Go to step 3.
DIAGNOSIS & TESTING
LTSMD030074
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03–465Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.DETECT MALFUNCTIONING PART
• Check the following:
Fuse 17
Harness connectors C-103, E-103, terminal 1
Front fuse and relay box connector A
Harness open or short between ECM and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts.
4.CHECK ECM POWER SUPPLY CIRCUIT - (2)
• Check voltage between ECM terminal 64 and ground.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Check the following:
Harness connectors A-102, E-105, terminal 4
Front fuse and relay box connector A
Harness open or short between ECM and battery
5.CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace ground connections.
6.CHECK ECM GROUND CIRCUIT FOR AN OPEN OR SHORT
• Disconnect ECM harness connector.
• Check harness continuity between ECM terminals 13, 26 and ground.
• Continuity should exist.
• Also check harness for short to power.
Is the check result normal?
Ye s>>Go to step 8.
No
>>Go to the next step.
7.DETECT MALFUNCTIONING PART
• Check harness for open or short between ECM terminals 13, 26 and ground.
• Repair open circuit or short to power in harness or connectors.
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
03–466Chery Automobile Co., Ltd.