2009 CHERY TIGGO check engine light

Downloaded from www.Manualslib.com manuals search engine Sensors & Relays
•Gently apply a slight vibration to sensors and relays in the system you are inspecting. This test may indicate a
loose or poorly mounted sensor or relay.
Engine Compartment
• There are several reasons a vehicle or engine vibration could cause an electrical complaint. Some of the things
to check for are:
Connectors not fully seated.
Wiring harness not long enough and is being stressed due to engine vibrations or rocking.
Wires laying across brackets or moving components.
Loose, dirty or corroded ground wires.
Wires routed too close to hot components.
• To inspect components under the hood, start by verifying the integrity of the ground connections (See Ground
Inspection described later). First, verify that the system is properly grounded. Then check for any loose connec-
tions by gently shaking the wiring or components as previously explained. Using the wiring diagrams, inspect
the wiring for continuity.
Behind The Instrument Panel
• An improperly routed or improperly clamped harness can become pinched during accessory installation. Vehicle
vibration can aggravate a harness which is routed along a bracket or near a mounting screw.
• An unclamped or loose harness can cause wiring to be pinched by seat components (such as slide guides)
during vehicle vibration. If the wiring runs under seating areas, inspect wire routing for possible damage or
pinching.
Heat Sensitivity Test
The customer’s concern may occur during hot weather or after the vehicle has sat for a short time. In such cases you
will want to check for a heat sensitive condition.
To determine if an electrical component is heat sensitive, heat the component with a heat gun or equivalent.
CAUTION:
Do not heat components above 60°C (140°F).
If the incident occurs while heat testing the component, replace or properly insulate the component as needed.
Freezing Test
The customer may indicate the incident goes away after the vehicle warms up (winter time). The cause could be
related to water freezing somewhere in the wiring/electrical system. There are two methods to check for this:
•The first method is to arrange for the owner to leave the vehicle overnight. Make sure it will get cold enough to
duplicate the complaint. Leave the vehicle parked outside overnight. In the morning, do a quick and thorough
diagnosis of those electrical components which could be affected.
• The second method is to put the suspect component into a freezer long enough for any water to freeze. Rein-
stall the part into the vehicle and check for a reoccurrence of the incident. If it occurs, repair or replace the
component as needed.
Water Intrusion Test
The incident may occur only during high humidity or in rainy/snowy weather. In such cases the incident could be
caused by water intrusion on an electrical part. This can be simulated by soaking the car or running it through a car
wash.
Electrical Load Test
The incident may be electrical load sensitive. Perform diagnosis with all accessories (including A/C, rear window
defogger, radio, fog lamps) turned on.
Cold or Hot Starting Test
On some occasions an electrical incident may occur only when the vehicle is started cold, or it may occur when the
vehicle is restarted hot shortly after being turned off. In these cases you may have to keep the vehicle overnight to
make a proper diagnosis.
DIAGNOSING ELECTRICAL FAILURES
01
01–17Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Voltage Drop Test
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage drop in
a circuit is caused by a resistance in the circuit during operation.
•Check the circuit using a Digital Multimeter (DMM).
• When measuring resistance with a DMM, remember that contact by a single strand of wire will give a reading
of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire is not able
to carry the current. The single strand will have a high resistance to the current. This will be indicated as a
slight voltage drop.
• Unwanted resistance can be caused by the following:
Undersized wiring (single strand example)
Corrosion on switch contacts
Loose wire connections or splices
Precautions For Handling Control Modules and Electrical Components
•Never reverse polarity of battery terminals.
• Only install components specified for the vehicle.
• Before replacing the control module, check the input and output and functions of the components.
• When disconnecting components:
Do not apply excessive force when disconnecting a connector.
If a connector is installed by tightening bolts, loosen mounting bolt, then remove it by hand.
• When connecting components:
Before installing a connector, make sure the terminal is not bent or damaged, and then correctly connect it.
When installing a connector by tightening bolts, tighten the mounting bolt until the painted area of the con-
nector becomes even with the surface.
• Do not apply excessive shock to the control module by dropping or hitting it.
• Be careful to prevent condensation in the control module due to rapid temperature changes and do not let
water or rain get on it. If water is found in the control unit, dry it fully and then install it in the vehicle.
• Be careful not to let oil get on the control module connector.
• Avoid cleaning the control module with volatile oil.
• When using a DMM, be careful not to let the test probes touch each other causing a short circuit. Prevent the
power transistor in the control module from being
shorted to damaging battery voltage.
• When checking input and output signals of the con-
trol module, use the specified test adapter (if
applicable).
DIAGNOSING ELECTRICAL FAILURES
LTSMD030028
01–18Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Engine Performance Diagnostics
CONDITIONPOSSIBLE CAUSE CORRECTION
Engine Does Not Start 1. Weak battery.
2. Corroded or loose battery
connections.
3. Faulty starter.
4. Faulty coil(s) or control unit.
5. Incorrect spark plug gap.
6. Contamination in fuel system.
7. Faulty fuel pump.
8. Incorrect timing.1. Test battery. Charge or replace if
necessary.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
3. Test starting system. Check for
codes. (Refer to Appropriate
Diagnostic Information)
4. Test and replace if needed. (Refer
to Appropriate Diagnostic
Information)
5. Set gap.
6. Clean system and replace fuel
filter.
7. Test fuel pump and replace as
needed. (Refer to Appropriate
Diagnostic Information)
8. Check for a skipped timing belt.
Engine Stalls Or Idles Rough 1. Idle speed too low.
2. Incorrect fuel mixture.
3. Intake manifold leakage.
4. Faulty ignition coil(s).1. Test minimum air flow. (Refer to
Appropriate Diagnostic Information)
2. (Refer to Appropriate Diagnostic
Information)
3. Inspect intake manifold, manifold
gasket, and vacuum hoses.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Loss Of Power 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
3. Faulty fuel pump.
4. Incorrect valve timing.
5. Leaking cylinder head gasket.
6. Low compression.
7. Burned, warped, excessive
clearance, or pitted valves.
8. Plugged or restricted exhaust
system.
9. Faulty ignition coil(s).
10. Burned spark plugs.1. Clean spark plugs and set gap.
2. Clean system and replace fuel
filter.
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each
cylinder.
7. Replace valves.
8. Perform exhaust restriction test.
Install new parts.
9. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
10. Replace spark plugs.
DIAGNOSIS & TESTING
02
02–13Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Engine Performance Diagnostics
CONDITIONPOSSIBLE CAUSE CORRECTION
Engine Does Not Start 1. Weak battery.
2. Corroded or loose battery
connections.
3. Faulty starter.
4. Faulty coil(s) or control unit.
5. Incorrect spark plug gap.
6. Contamination in fuel system.
7. Faulty fuel pump.
8. Incorrect timing.1. Test battery. Charge or replace if
necessary.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
3. Test starting system. Check for
codes. (Refer to Appropriate
Diagnostic Information)
4. Test and replace as needed.
(Refer to Appropriate Diagnostic
Information)
5. Set gap.
6. Clean system and replace fuel
filter.
7. Test fuel pump and replace as
needed. (Refer to Appropriate
Diagnostic Information)
8. Check for a skipped timing belt.
Engine Stalls Or Idles Rough 1. Idle speed too low.
2. Incorrect fuel mixture.
3. Intake manifold leakage.
4. Faulty ignition coil(s).1. Test minimum air flow. (Refer to
Appropriate Diagnostic Information)
2. (Refer to Appropriate Diagnostic
Information)
3. Inspect intake manifold, manifold
gasket, and vacuum hoses.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Loss Of Power 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
3. Faulty fuel pump.
4. Incorrect valve timing.
5. Leaking cylinder head gasket.
6. Low compression.
7. Burned, warped, excessive
clearance, or pitted valves.
8. Plugged or restricted exhaust
system.
9. Faulty ignition coil(s).
10. Burned spark plugs.1. Clean spark plugs and set gap.
2. Clean system and replace fuel
filter.
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each
cylinder.
7. Replace valves.
8. Perform exhaust restriction test.
Install new parts.
9. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
10. Replace spark plugs.
DIAGNOSIS & TESTING
02
02–87Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Engine Performance Diagnostics
CONDITIONPOSSIBLE CAUSES CORRECTION
Engine Does Not Start 1. Weak battery.
2. Corroded or loose battery
connections.
3. Faulty starter.
4. Faulty coil(s) or control unit.
5. Incorrect spark plug gap.
6. Contamination in fuel system.
7. Faulty fuel pump.
8. Incorrect timing.1. Test battery. Charge or replace if
necessary.
2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to terminals.
3. Test starting system. Check for
codes. (Refer to Appropriate
Diagnostic Information)
4. Test and replace as needed.
(Refer to Appropriate Diagnostic
Information)
5. Set gap.
6. Clean system and replace fuel
filter.
7. Test fuel pump and replace as
needed. (Refer to Appropriate
Diagnostic Information)
8. Check for a skipped timing belt.
Engine Stalls Or Idles Rough 1. Idle speed too low.
2. Incorrect fuel mixture.
3. Intake manifold leakage.
4. Faulty ignition coil(s).1. Test minimum air flow. (Refer to
Appropriate Diagnostic Information)
2. (Refer to Appropriate Diagnostic
Information)
3. Inspect intake manifold, manifold
gasket, and vacuum hoses.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Loss Of Power 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
3. Faulty fuel pump.
4. Incorrect valve timing.
5. Leaking cylinder head gasket.
6. Low compression.
7. Burned, warped, excessive
clearance, or pitted valves.
8. Plugged or restricted exhaust
system.
9. Faulty ignition coil(s).
10. Burned spark plugs.1. Clean spark plugs and set gap.
2. Clean system and replace fuel
filter.
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Correct valve timing.
5. Replace cylinder head gasket.
6. Test compression of each
cylinder.
7. Replace valves.
8. Perform exhaust restriction test.
Install new parts.
9. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
10. Replace spark plugs.
DIAGNOSIS & TESTING
02
02–163Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Check the valve spring center line. Discard the springs that do not meet specifications.
• The following specifications apply to both intake
and exhaust valve springs.
VALVE SPRING CENTER LINE
DESCRIPTION SPECIFICATION LIMIT
Spring Center Line ≤2.0° ≤4.0°
Assembly
1. Install the valve springs (2).
2. Install the valve spring retainers (1).
3. Using valve spring compressor MD - 998772, com-
press the valve springs.
4. Install the valve keepers.
5. Strike the valve stem lightly with a plastic hammer after installation to verify proper assembly.
CYLINDER HEAD UNIT REPAIR
LTSM020100
LTSM020039
02
02–255Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Electronic Throttle Control Actuator Self-Learning Operation Introduction
EPC Lamp Control Strategy
The Electronic Pedal Control (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 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.
Self-Learning Components
Perform the self-learning process when the following repairs have been made:
•Replaced the ECM
• ECM which was disconnected and reconnected
• Replaced the Accelerator Pedal
• Replaced the 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.
Self-Learning Condition
The self-learning condition as the Electronic Throttle Control Actuator Self-Learning Condition.
CAUTION:
Ensure that the Electronic Throttle Control Actuator self-learning process lasts for at least 10 sec-
onds according to the Electronic Throttle Control Actuator self-learning condition. If the self-learn-
ing process fails, the engine can’t be started or the EPC lamp will be on. If this condition occurs,
perform the Self-Learning operating again after the DTCs be erased in ECM.
Diagnostic Trouble Code (DTC) List
DTC DTC DEFINITION
P000A ACamshaft Position Slow Response
P000B BCamshaft Position Slow Response
P0010 ACamshaft Position Actuator Circuit/Open
P0011 ACamshaft Position - Timing Over - Advanced or System Performance
P0012 ACamshaft Position - Timing Over - Retarded
P0013 BCamshaft Position - Actual Circuit/Open
P0014 BCamshaft Position - Timing Over - Advanced or System Performance
P0015 BCamshaft Position - Timing Over - Retarded
P0016 Crankshaft - Camshaft Position Correlation
P0030 O
2Sensor Heater Control Circuit (Bank 1 Sensor 1)
P0031 O
2Sensor Heater Control Circuit (Bank 1 Sensor 1) Low
DIAGNOSIS & TESTING
03
03–23Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.ITEMTEST METHOD DATA (AVERAGE DC
VOLTAGE)
19 Knock sensor 1 •
Test Method 1: Knock at
cylinder with rubber
hammer
• Test Method 2: Knock at
sensor slightly Output signal voltage
should exist.
20 Knock sensor 2
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC SET CONDITION POSSIBLE CAUSE
P0324 Knock control system
error ECM detected that the
input signal is out of the
acceptable range. •
Knock sensor
• Harness or connectors
• ECM
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.
• Run engine for a while then select view DTC.
• If DTC is detected, go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See 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.CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground harness or connections.
DIAGNOSIS & TESTING
03–178Chery Automobile Co., Ltd.