2009 CHERY TIGGO ECU

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Diagnostic Help
1. The X-431 scan tool connects to the Data Link Connector (DLC) and communicates with the vehicle electronicmodules through the data network.
2. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.
3. If the Diagnostic Trouble Code (DTC) cannot be deleted, it is a current fault.
4. Use only a digital multimeter to perform voltage readings on electronic systems.
5. Refer to any Technical Bulletins that may apply to the failure.
6. Visually inspect the related wiring harness.
7. Inspect and clean all Engine Control Module (ECM) grounds that are related to the most current DTC.
8. If numerous trouble codes were set, use a wiring schematic and look for any common ground circuits or voltage supply circuits that may apply to the DTC.
Intermittent DTC Troubleshooting
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.
• Wiggle the related wiring harness and connectors while looking for an interrupted signal on the affected circuit.
• If possible, try to duplicate the conditions under which the DTC set.
• 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 dam-
age, or foreign material.
• A data recorder, and/or oscilloscope should be used to help diagnose intermittent conditions.
• Remove the Engine Control Module (ECM) from the troubled vehicle and install in a new vehicle and test. If
the DTC cannot be deleted, the ECM is malfunctioning. If the DTC can be deleted, return the ECM to the origi-
nal vehicle.
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.
03–22Chery 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. Program the vehicle Immobilizer control module whenever the Engine Control Module (ECM) is replaced.
5. The scan tool connects to the Data Link Connector (DLC) and communicates with the ECM.
6. 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.
7. 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.
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.
Electronic Throttle Control Actuator Self-Learning Operation Introduction
EPC Lamp Control Strategy
The EPC lamp will be on for a few seconds and turn off after the ignition switch is turned on and the engine is not
running. After the engine started, the EPC lamp will go off if the DTC is not existent in ECM. If the internal self-check
failed, the EPC lamp will continue to light.
Electronic Throttle Control Actuator Self-Learning Condition
•Engine stopped and the ignition switch is on.
• Vehicle speed is 0 km/h.
• The Engine Coolant Temperature (ECT) is between 5.25°C and 100.5°C.
• The intake air temperature is more than 5.25°C.
• The accelerator pedal fully released.
• Battery voltage is more than 12 V.
Electronic Throttle Control Actuator Self-Learning Operating Procedure
Turn the ignition switch on for 10 seconds, then turn the ignition switch off. During the procedure, do not operate any
other components.
03
03–247Chery 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
03
03–459Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS AND TESTING
Starter Motor Bench Test
Starter motor operation can be confirmed by performing
the following free-running bench test. This test can only
be performed with the starter motor removed from the
vehicle.1. Remove the starter motor from the vehicle (See Starter Motor Removal & Installation in Section 05
Starting and Charging).
2. Mount the starter motor securely in a soft-jawed bench vise. The vise jaws should be clamped on
the mounting flange of the starter motor (never
clamp on the starter motor by the field frame).
3. Connect a suitable volt-ampere tester and a 12 V battery to the starter motor in series, and set the
ammeter to the 100 A scale.
4. Install a jumper wire from the solenoid terminal to the solenoid battery terminal. The starter motor should oper- ate. If the starter motor fails to operate, replace the faulty starter motor assembly.
5. Adjust the carbon pile load of the tester to obtain the free running test voltage.
6. Note the reading on the ammeter and compare this reading to the free-running test maximum amperage draw.
7. If the ammeter reading exceeds the maximum amperage draw specification, replace the faulty starter motor assembly.
Starter Solenoid Test
This test can only be performed with the starter motor removed from the vehicle.
1. Remove the starter motor from the vehicle (See Starter Motor Removal & Installation in Section 05
Starting and Charging).
2. Disconnect the wire from the solenoid field coil ter- minal.
3. Check the solenoid for continuity between the sole- noid terminal and the solenoid field coil terminal
with a continuity tester. There should be continuity.
If there is continuity, go to Step 4. If not, replace
the faulty starter motor assembly.
4. Using a continuity tester, check for continuity between the solenoid terminal and the solenoid
case. There should be continuity. If not, replace the
faulty starter motor assembly.
VISM050005
VISM050007
05–6Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Battery
Description
This vehicle is equipped with a single 12 V battery. All of the components of the battery system are located within the
engine compartment of the vehicle. The battery system for this vehicle contains the following components:
•Battery - The storage battery provides a reliable means of storing a renewable source of electrical energy within
the vehicle.
• Battery Cables - The battery cables connect the positive and negative charged battery terminal posts to the
vehicle electrical system.
• Battery Hold Down - The battery hold down hardware secures the battery in the battery tray.
• Battery Tray - The battery tray provides a secure mounting location in the vehicle for the battery and an anchor
point for the battery hold down hardware.
Operation
The battery is designed to store electrical energy in a chemical form. When an electrical load is applied to the ter-
minals of the battery, an electrochemical reaction occurs. This reaction causes the battery to discharge electrical
current from its terminals. As the battery discharges, a gradual chemical change takes place within each cell. The
sulfuric acid in the electrolyte combines with the plate materials, causing both plates to slowly change to lead sulfate.
At the same time, oxygen from the positive plate material combines with hydrogen from the sulfuric acid, causing the
electrolyte to become mainly water. The chemical changes within the battery are caused by the movement of excess
or free electrons between the positive and negative plate groups. This movement of electrons produces a flow of
electrical current through the load device attached to the battery terminals.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the positive battery cable.
3. Remove the battery hold down retaining nuts (1).
4. Remove the battery.
5. Installation is in the reverse order of removal.
LTSM050001
05
05–7Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Positive Battery Cable
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the positive battery cable.
3. Remove the battery cable from the B+ terminal of the generator.
4. Remove the battery cable from the B+ terminal of the starter motor.
5. One at a time, trace the battery cable retaining push pins, fasteners and routing clamps until the cables are freefrom the vehicle.
6. Remove the battery cable from the engine compartment.
7. Installation is in the reverse order of removal.
Negative Battery Cable
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the bolts securing the negative cable to the body ground and the transaxle.
3. One at a time, trace the battery cable retaining push pins, fasteners and routing clamps until the cables are free from the vehicle.
4. Remove the battery cable from the engine compartment.
5. Installation is in the reverse order of removal.
Battery Hold Down
Removal & Installation
1. Remove the retaining nuts (1).
2. Remove the battery hold down.
3. Installation is in the reverse order of removal.
ON-VEHICLE SERVICE
LTSM050001
05–8Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Diagnostic Help
1. The X-431 scan tool connects to the Data Link Connector (DLC) and communicates with the vehicle electronicmodules through the data network.
2. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.
3. If the Diagnostic Trouble Code (DTC) cannot be deleted, it is a current fault.
4. Use only a digital multimeter to perform voltage readings on electronic systems.
5. Refer to any Technical Bulletins that may apply to the failure.
6. Visually inspect the related wiring harness.
7. Inspect and clean all Engine Control Module (ECM) grounds that are related to the most current DTC.
8. If numerous trouble codes were set, use a wiring schematic and look for any common ground circuits or voltage supply circuits that may apply to the DTC.
Intermittent DTC Troubleshooting
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.
• Wiggle the related wiring harness and connectors while looking for an interrupted signal on the affected circuit.
• If possible, try to duplicate the conditions under which the DTC set.
• 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 dam-
age, or foreign material.
• A data recorder, and/or oscilloscope should be used to help diagnose intermittent conditions.
• Remove the Engine Control Module (ECM) from the troubled vehicle and install in a new vehicle and test. If
the DTC cannot be deleted, the ECM is malfunctioning. If the DTC can be deleted, return the ECM to the origi-
nal vehicle.
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. Diagnostic Scan Tool X-431
2. Digital Multimeter
3. Jumper Wire
Transaxle Control Module (TCM) Electrical Harness Test Tool
If using a TCM electrical harness test tool, you can diagnose the TCM harness while the TCM is still connected.
•Measure sensor and solenoid resistance (always measure resistance with the power off).
• Measure the signal voltage of the TCM (always measure voltage with the power on).
08
08–19Chery Automobile Co., Ltd.