low oil pressure CHERY TIGGO 2009 Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine Torque Specifications
CAUTION:
When torquing a fastener in two steps, DO NOT use a torque wrench for the second step.
DESCRIPTIONTORQUE (N·m)
Alternator Adjusting Bolt 10
Alternator Bracket Bolt 24
Alternator Center Nut 45
Camshaft Position Sensor Bracket 14
Camshaft Position Sensor 10
Camshaft Position Sensor Cylinder 22
Crank Belt Gear 25
Ignition Coil 10
Locking Bolt 22
Spark Piston 25
Water Pump Belt Gear 9
Timing Belt Automatic Tensioner Bolt 24
Belt Gear of Balance Axle 46
Central Belt Wheel Bolt 36
Lower Balance Shaft Bolt 55
Timing Belt Cover Bolts 11
Tensioner Wheel Bolt 49
Tensioner Arm Bolt 22
Tensioner Bracket 49
Timing Belt Indicator 09
Timing Belt Rear Cover 11
Upper Balance Shaft Tensioner Bolt 19
Camshaft Pulley Bolt 90
Crankshaft Pulley Bolt 120
Connecting Bolt of Outflow Pipe 20
EGR Valve 22
Exhaust Manifold Nut (M8) 30
Exhaust Manifold Nut (M10) 50
Fuel Pressure Regulator 9
Fuel Return Pipe 09
Injector and Distribution Pipe 12
Intake Manifold Bolt 20
Intake Manifold Bracket 14
Thermostat Housing Bolt 24
Water Pump Bolts 14
Rocker Cover Bolt 4
Rocker and Camshaft Assembly Bolt 32
Trust Bearing Cover Bolt 19
GENERAL INFORMATION
02–153Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSES CORRECTION
Engine Miss On Acceleration 1. Dirty or incorrectly gapped spark
plugs.
2. Contamination in fuel system.
7. Burned, warped, excessive
clearance, or pitted valves.
4. Faulty ignition coil(s).1. Clean spark plugs and set gap.
2. Clean fuel system and replace
fuel filter.
3. Replace valves.
4. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
Engine Miss At High Speed 1. Dirty or incorrect spark plug gap.
2. Faulty ignition coil(s).
3. Dirty fuel injector(s).
4. Contamination in fuel system.1. Clean spark plugs and set gap.
2. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
3. Test and replace if necessary.
(Refer to Appropriate Diagnostic
Information)
4. Clean system and replace fuel
filter.
Engine Mechanical Diagnostics
CONDITION
POSSIBLE CAUSES CORRECTION
Valve Train Noise 1. High or low oil level in crankcase.
2. Thin or diluted oil.
3. Thick oil.
4. Low oil pressure.
5. Worn cam lobe.
6. Worn valve guides.
7. Excessive runout of valve seats
on valve faces.1. Check and correct engine oil
level.
2. Change oil to correct viscosity.
3. Change engine oil and filter.
4. Check and correct engine oil
level.
5. Install new camshaft.
6. Replace cylinder head.
7. Grind valve seats and replace
valves.
Connecting Rod Noise 1. Insufficient oil supply.
2. Low oil pressure.
3. Thin or diluted oil.
4. Excessive bearing clearance.
5. Connecting rod journal out-of-
round.
6. Connecting rod out-of-round.
7. Misaligned connecting rods.
8. Connecting rod nuts loose.1. Check engine oil level.
2. Check engine oil level. Inspect oil
pump relief valve and spring.
3. Change oil to correct viscosity.
4. Measure bearings for correct
clearance. Repair if necessary.
5. Replace crankshaft or grind
surface.
6. Replace connecting rod.
7. Replace bent connecting rods.
8. Tighten the connecting rod nuts.
Main Bearing Noise 1. Insufficient oil supply.
2. Low oil pressure.
3. Thin or diluted oil.
4. Excessive bearing clearance.
5. Excessive end play.
6. Crankshaft journal out-of-round or
worn.
7. Loose flywheel or torque
converter.1. Check engine oil level.
2. Check engine oil level. Inspect oil
pump.
3. Change oil to correct viscosity.
4. Measure bearings for correct
clearance. Repair if necessary.
5. Check thrust bearing for wear on
flanges.
6. Replace crankshaft or grind
journals.
7. Tighten to correct torque.
DIAGNOSIS & TESTING
02–164Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSES CORRECTION
Oil Pressure Drop 1. Low oil level.
2. Faulty oil pressure sending unit.
3. Low oil pressure.
4. Clogged oil filter.
5. Thin or diluted oil.
6. Excessive bearing clearance.1. Check engine oil level.
2. Install new sending unit.
3. Check sending unit and main
bearing oil clearance.
4. Install new oil filter.
5. Change oil to correct viscosity.
6. Measure bearings for correct
clearance.
Oil Leaks 1. Misaligned or deteriorated
gaskets.
2. Loose fastener, broken or porous
metal part.
3. Misaligned or deteriorated cup or
threaded plug.1. Replace gasket.
2. Tighten, repair or replace the part.
3. Replace if necessary.
Oil Consumption Or Spark Plugs
Fouled 1. PCV system malfunction.
2. Worn, scuffed or broken rings.
3. Carbon in oil ring slots.
4. Rings fitted too tightly in grooves.
5. Worn valve guide(s).
6. Valve stem seal(s) worn or
damaged.1. Check system and repair if
necessary.
2. Hone cylinder bores. Install new
rings.
3. Install new rings.
4. Remove rings and check grooves.
If groove is not proper width, replace
piston.
5. Replace cylinder head.
6. Replace seal(s).
Cylinder Compression Pressure Test
•
The result of a cylinder compression pressure test
can be utilized to diagnose several engine malfunc-
tions.
• Ensure the battery is completely charged and the
engine starter motor is in good operating condition.
Otherwise the indicated compression pressures
may not be valid for diagnostic purposes.
Check engine oil level and add oil if neces-
sary.
Disconnect the spark plug wires.
Remove all spark plugs from engine (as spark plugs are being removed, check electrodes for
abnormal firing indicators fouled, hot, oily,
etc.).
Record cylinder number of each spark plug for future reference.
Disconnect fuel injector electrical connectors.
Be sure throttle blade is fully open during the compression check.
Insert compression pressure adaptor or the equivalent into each spark plug hole in cylinder head.
Crank engine until maximum pressure is reached on gauge. Record each cylinder pressure.
Compression should not be less than 880 kPa and not vary more than 25 percent from cylinder to cylinder.
If one or more cylinders have abnormally low compression pressures, repeat the compression test.
If the same cylinder or cylinders repeat an abnormally low reading on the second compression test, it could indicate the existence of a problem with the cylinder in question.
NOTE :
The recommended compression pressures are to be used only as a guide to diagnosing engine problems. An engine
should not be disassembled to determine the cause of low compression unless some malfunction is present.
DIAGNOSIS & TESTING
LTSM020191
02
02–165Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 10.Disconnectandremovethefuelline(2)atthefuel
rail.
11.Removethefuelpressureregulatorretainingbolt
(1)andsetthefuelpressureregulatoraside.
(Tighten:Fuelpressureregulatorboltto9N·m)
12.Removetheairinlethoseandtheaircleanercase
assembly.
13.Removetheacceleratorcableboltfromthecylinderhead.
14.Disconnectandremovethefollowingelectricalconnectors:
Coolanttemperaturesensor
Crankshaftpositionsensor
Camshaftpositionsensor
Ignitioncoil
Fourfuelinjectors
Airflowsensor
Canistersolenoidvalve
EGRcontrolsolenoidvalve
Throttlepositionsensor
A/Ccompressor
Oilpressuresensor
Powersteeringpumppressureswitch
Generator
Upstreamoxygensensor
Knocksensor
Idleaircontrolmotor
ON-VEHICLESERVICE
LTSM040006
LTSM020160
02–184CheryAutomobileCo.,Ltd.

Downloaded from www.Manualslib.com manuals search engine Upper Balance Shaft
Removal & Installation
1 - Upper Balance Shaft Rear Bearing
2 - Upper Balance Shaft Front Bearing
3 - Upper Balance Shaft
4 - Oil Pressure Switch
5 - Front Cover Gasket
6 - Oil Pump Driven Gear
7 - Oil Pump Drive Gear
8 - Front Cover
9 - Upper Balance Shaft Oil Seal
10 - Crankshaft Front Oil seal
11 - Oil Filter Adapter Gasket
12 - Oil Filter Adapter13 - Pressure-Relief Valve
14 - Pressure Relief Spring
15 - Pressure-Relief Valve Seal
16 - Oil Filter
17 - Pressure Relief Valve Plug
18 - Plug
19 - Front Cover Bolt
20 - O-Ring
21 - Oil Pump Oil Seal
22 - Oil Pump Cover
23 - Lower Balance Shaft
24 - Lower Balance Shaft Rear Bearing
ON-VEHICLE SERVICE
LTSM020133
02–204Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Lower Balance Shaft
Removal & Installation
1 - Upper Balance Shaft Rear Bearing
2 - Upper Balance Shaft Front Bearing
3 - Upper Balance Shaft
4 - Oil Pressure Switch
5 - Front Cover Gasket
6 - Oil Pump Driven Gear
7 - Oil Pump Drive Gear
8 - Front Cover
9 - Upper Balance Shaft Oil Seal
10 - Crankshaft Front Oil Seal
11 - Oil Filter Adapter Gasket
12 - Oil Filter Adapter13 - Pressure-Relief Valve
14 - Pressure Relief Spring
15 - Pressure-Relief Valve Seal
16 - Oil Filter
17 - Pressure Relief Valve Plug
18 - Plug
19 - Front Cover Bolt
20 - O-Ring
21 - Oil Pump Oil Seal
22 - Oil Pump Cover
23 - Lower Balance Shaft
24 - Lower Balance Shaft Rear Bearing
ON-VEHICLE SERVICE
LTSM020133
02–208Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Using a press, press the piston pin (1) in under pressure. When the pressure is less than standard value,
replace piston pin and piston component and/or
replace connecting rod.standard value: 7,350-
17,200 Newtons
• Check to make sure the piston can rotate freely.
Piston Ring Installation
NOTE :
The compression rings have an identification mark (1)
on the top of the ring.
Piston Ring Identification Marks:
•No. 1 Ring - 1R
• No. 2 Ring - 2R
When installing piston ring, keep the mark upwards and
towards the top of piston.
• Size markings of pistons shown as the following:
SIZE IDENTIFICATION
Standard None
Increase 0.50 mm 50
Increase 1.00 mm 100
CAUTION:
Do not use a piston ring expander to install the oil control rings.
Oil Control Ring Installation
•Install the main ring of oil control ring into oil ring groove.
NOTE :
There is no difference between the upper and lower oil control rings.
ENGINE UNIT REPAIR
LTSM020113
LTSM020116
02
02–227Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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
03–3Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
The Engine Control Module (ECM) utilizes integrated circuitry and information carried on the Controller Area Network
(CAN) data bus along with many hard wired inputs to monitor many sensors and switches inputs throughout the
vehicle. In response to those inputs, the internal circuitry and programming of the ECM allow it to control and inte-
grate many electronic functions and features of the vehicle through both hard wired outputs and the transmission of
electronic message outputs to other electronic modules in the vehicle over the CAN data bus.
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
• A/C Pressure Switch
• Camshaft Position (CMP) Sensor
• Crankshaft Position (CKP) Sensor
• Engine Coolant Temperature (ECT) Sensor
• Intake Air Temperature (IAT) Sensor
• Air Flow Sensor
• Throttle Position Sensor (integral with Electronic Throttle Control Actuator)
• Power Steering Switch
• Accelerator Pedal Position (APP) Sensor
• Knock Sensor
• Oxygen Sensor (Upstream & Downstream)
• 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 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.
03
03–229Chery Automobile Co., Ltd.

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
03
03–457Chery Automobile Co., Ltd.