Diagnosis of gasoline engine system

Brake System 1 HPC Service Diagnosis Program Passenger (SDP, PL 2) Diagnosis of Gasoline Engine System HPC Service Diagnosis Program Passenger (SDP, PL 2)Preface Diagnosis of Gasoline Engine System 3. chuẩn đoán động cơ xăng , cách chuẩn đoán lỗi thường gặp trên động cơ xăng

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Diagnosis of Gasoline Engine System

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Preface

The recent increase in carbon emission has strengthened the awareness of the seriousness of its effects

on the global warming and climate changes The vehicle emission regulation is continuously being strengthened and in response, automobiles are being equipped with cutting-edge and intelligent technologies, which are rapidly changing

Such changes in the automotive technologies require service centers to possess high level diagnosis techniques to troubleshoot the advanced technological systems in an automobile

This lesson is composed of the following contents to improve your ability in troubleshooting the electronic control gasoline engine

 First, the lesson includes educational modules that consist of knowledge and technology required to perform troubleshooting task;

 Second, the lesson will be on-site oriented to strengthen connection with the actual tasks; and

 Third, the lesson will be developed with a standardized troubleshooting procedure

The lesson is composed of key modules that will facilitate the improvement of the actual

troubleshooting capabilities and the participants will partake in-depth learning experience for each lesson items through corresponding hands-on experience This Maintenance Manual will provide you with important guideline to facilitate your learning experience

NOTE

The contents herein may be revised, without prior notice, in accordance with the specification changes of Hyundai Motor Company's vehicles

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Table of Contents

Management Philosophy System Error! Bookmark not defined Group & Industry Overview Error! Bookmark not defined

Preface 3

Table of Contents 4

Module 1 Engine Management System 7

1.1 Basic Knowledge of the System 9

1.1.1 System Overview 9

1.1.2 Roles 10

1.1.3 Input and Output Elements 11

1.1.4 Sensor 12

1.1.5 Actuator 19

1.2 Worksheet 20

1.2.1 PCM (ECM) Circuit Analysis 20

1.2.2 Data Analysis 21

1.2.3 Air-Fuel Ratio 39

1.2.4 Case Study 41

Module 2 Continuously Variable Valve Timing 43

2.1.2 System Operation Principles 46

2.1.3 Effects of Application 50

2.1.4 Components 52

2.1.5 Driving Mechanism 54

2.1.6 Dual CVVT 57

2.1.7 Dual CVVT Configuration 59

2.2 Worksheet 61

2.2.1 System Components 61

2.2.2 Driving Mechanism 63

2.2.3 Service Data Analysis 68

2.2.4 Waveform Analysis 73

2.2.5 DTC Analysis 74

2.2.6 Case Study 75

2.3 Standard Troubleshooting Process 77

Module 3 Gasoline Direct Injection System 81

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3.1.2 Components 84

3.1.3 System Operation Principles 86

3.2 Worksheet 90

3.2.1 Understanding the System 90

3.2.2 Troubleshooting 94

3.3 Standard Troubleshooting Process 98

Module 4 On-Board Diagnosis System 101

4.1.2 Standard Diagnostic Connector and DTC 104

4.1.3 Exhaust Gas Monitoring 105

4.2 Worksheet 112

4.2.1 Understanding the Principles of the Vapor Gas Leakage Monitoring System 112

4.2.2 Vapor Gas Leakage Monitoring System Diagnosis 118

4.2.3 Case Study 122

4.2.4 Understanding Misfire 123

4.2.5 Case Study - Misfire 126

4.2.6 Standard Troubleshooting Process 131

Module 5 Service Tip 139

5.1 Basic Usage of GDS 141

5.2 Current Data 147

5.2.1 -1.6 MPI Engine Current Data 147

5.2.2 -1.6 GDI Engine Current Data 151

5.2.4 -2.0 TCI Engine Current Data 158

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Module 1 Engine Management System

LESSON

Basic Knowledge of the System 9

Worksheet 20

EMS is the item that consists of the basic details on the engine configuration and controls The most

important aspect in diagnosing malfunction is to figure out how to analyze the components that are

not visible To do this, you will learn the following 4 main points

 Understand the overall circuit of the EMS configuration: You can see the entire configuration and

PCM control at a single glance

 Check Input/Output terminal information: Check the input/output information of each component

and understand what signal the components transmit and receive

 Analyze service data: You must be able to analyze the invisible data exchange through the output

readings of the sensors

 Check DTC: You must know what items are included in the component related error codes

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apply 제목 1 to the text that you want to appear here Diagnosis of Gasoline Engine System

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1.1 Basic Knowledge of the System

Demands have increased for improvement of related technology including safety, convenience,

economy and environmental protection of vehicle In the past, engine control has been achieved

through mechanical elements such as carburetor or power distributor

However, simultaneous control of exhaust gas was impossible and optimal control of engine was

operated in simultaneous injection type, but recent engine uses independent injection type which

operates each injector independently

System not only supplies required torque and output of engine and controls the air-fuel ratio for

exhaust gas control, but also controls the ignition timing Recent EMS controls injectors, ETC, spark

plugs, etc depending on the status vehicle and various sensors that measure mechanical values of

engine

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The figure shows the configuration of fuel injection control system, which consists of the intake system, the fuel system and the control system The intake system measures and controls the air required for combustion of engine and consists of Mass Air Flow type and MAP sensor type depending on the method of measuring the intake air The fuel system supplies the fuel to the combustion chamber and control system determines the optimal amount of fuel depending on the load and speed of the engine And, the amount of fuel supplied to the engine is controlled by injection time of injector

(1) Intake System

The intake system has different methods of measuring intake air depending on the system That is, there

is MAFS for direct measuring type But for indirect measuring type, MAFS does not exist and MAP sensor

is installed at the intake manifold In air flow diagram, air from the air duct passes through air cleaner and flows into the combustion chamber via MAFS, throttle valve, surge tank, intake manifold and intake port What is important in this course is that the suction resistance of air should be low and that amount

of suction air should be measured accurately and fast

The control system receives input signals from various sensors of engine, calculates the optimal amount

of fuel injection in consideration of engine load status, rotation speed, driving performance of vehicle, reduction of exhaust gas and reduction of fuel consumption rate, sends this data to injector and

controls the amount of fuel injection Micro computer calculates the amount of basic fuel injection from intake air flow and engine rpm, and calculates adjusted fuel amount by the input signal from various sensors In addition, it determines the injection timing and the cylinder to inject the fuel from CKP sensor and CMP sensor, and controls the feedback by the signals from oxygen sensor

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1.1.3 Input and Output Elements

Electronic control gasoline engine can be divided into input elements and output elements focusing on

ECU The input element includes Air Mass Sensor (MAF) which measures the amounts of air flowing to

combustion chamber and transmits the value to ECU; Oxygen Sensor that informs the oxygen

concentration of exhaust gas discharged through exhaust pipe for control of air fuel ratio; and various

sensors that detect coolant temperature and rpm of engine so that ECU can control the engine normally

The output element refers to the element that sends output signals directly from ECU to operate the

actuators or coils, and includes injector, ISA (Idle Speed Adjuster) and ignition coil Such part that

controls these control elements is called 'Control System' and this control system can be largely divided

into ignition system, injector, idling speed controller and exhaust gas controller

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1.1.4.1 Temperature Sensor

[Coolant Temperature Sensor] [Oil Temperature Sensor ] [Intake Temperature Sensor]

[Types of Temperature Sensor] [Coolant Temperature Sensor Circuit]

First one is the sensor that detects the temperature, such as coolant temperature sensor, intake

temperature sensor and exhaust gas temperature sensor It uses the property that resistance changes as the temperature rises

Its type includes NTC thermistor that has negative temperature coefficient, PTC thermistor that has positive temperature coefficient and CTR thermistor where electric resistance rapidly changes over some temperature

(1) Sensors Applied to Vehicles

Coolant Temperature Sensor, Intake Temperature Sensor, Oil Temperature Sensor, Pin Thermo Sensor, Exhaust Gas Temperature Sensor, Air Conditioner Indoor/Outdoor Temperature Sensor, LPG Temperature Sensor

(2) Types of Thermistor

The sensor having a resistance that changes with an increase in temperature is called Thermistor

 (-) Temperature Coefficient → NTC Thermistor (Negative Temperature Coefficient)

 (+) Temperature Coefficient → PTC Thermistor (Positive Temperature Coefficient)

 Electrical resistance rapidly changes at some temperature → CTR Thermistor (Critical Temperature Resistor)

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1.1.4.2 Pressure Sensor

[Intake Manifold - MAP Sensor] [Barometric Pressure Sensor in ECU]

Internal Structure of Pressure Sensor] [MAP Sensor Circuit]

Sensors that detect the pressure include intake manifold pressure sensor and barometric pressure

sensor

MAP sensor is used to determine the basic injection of fuel, injection time and ignition time by indirectly

detecting the amount of intake air depending on the pressure change of intake manifold MAP sensor is

installed at surge tank and measures the changes in absolute pressure in the intake manifold When the

engine operates, the pressure in intake manifold changes depending on engine status When the engine

load and rpm increase with throttle valve open, absolute pressure in intake manifold increases (decrease

in negative pressure) When the engine load and rpm decreases with throttle valve closed, absolute

pressure in the intake manifold decreases (increase in negative pressure) MAP sensor measures

absolute pressure in the intake manifold using the piezoelectric effects It is connected to intake

manifold as vacuum port to detect the changes in pressure of intake manifold The sensor consists of

piezo resistor that forms the bridge circuit and silicon chip It has different resistance values for

deformation and the signals proportional to the pressure of intake manifold flow through the bridge

circuit

Air pressure is an index that indicates the density of air The air density gets lowered as the altitude gets

higher, resulting in less amount of air Accordingly, the amount of fuel required to keep certain air-fuel

ratio decreases at the higher altitude Likewise, it is required to adjust the ignition timing depending on

the density of air It is used to compensate for adjustment of idling speed and operation of EGR valve in

some vehicles Like this, air pressure should be measured to compensate for the changing density of air

over the altitude or climate and Barometric Pressure Sensor (BPS) is required for this BPS is mounted as

all-in-one type with MAFS or installed inside engine ECU

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1.1.4.3 RPM Detection Sensor

[CKP Sensor] [CMP Sensor] [Wheel Speed Sensor]

[Magnetic Type - Analog] [Hall-IC Type - Digital]

it faces the round shape tone wheel as shown in the above left figure This tone wheel is installed inside the cylinder block depending on the engine or installed together with fly wheel in the middle position where it connects with transmission Mounting position of CKP sensor differs depending on mounting position of tone wheel In most passenger cars, it is mounted on sides of cylinder block In commercial vehicles or some RV types, it is sometimes mounted at transmission housing

In case of electronic induction type CKP sensor, several teeth are installed on tone wheel mounted on crank shaft (the teeth differ depending on vehicle type and among 60 teeth installed at the interval of 6°

in general two teeth are deleted and used as reference points) Install the sensor close to the teeth With regard to output of electronic induction type CKP sensor, tone wheel installed on the crank shaft rotates

as the engine rotates Accordingly, magnetic flux in the sensor changes and generates voltage signal At this time, the interval between the teeth and sensor is very important If it is narrower than the specified gap, it generates higher voltage than normal output signal to generate unstable state in fast driving condition If it is wider than the specified gap, it generates lower output voltage than the normal output signal, generating problems at the time of cranking Accordingly, it is very important to comply with specified torque and gaps accurately when mounting CKP

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(2) CMPS

Camshaft Position Sensor (CMP) is to monitor compression stroke TDC of No 1 cylinder and is used to

identify each cylinder to determine the fuel injection and ignition sequence Installation position of

sensor is the end of camshaft at all times to detect the position of camshaft This sensor is called No.1

TDC sensor or face sensor (mode sensor) depending on the manufacturer, and the sensor that uses Hall

Effect is sometimes called hall sensor Camshaft position sensor uses the principle of generating

electromotive force as the gap of the detection part of hall sensor changes while the teeth installed on

camshaft rotates together with camshaft It generates 1 digital pulse signal for each rotation of camshaft

(2 rotations of crank shaft) That is, as the current flows in hall device, electron inside the device is biased

to one direction and the potential difference is generated so that this voltage is detected Output

voltage is proportionate to the strength of current and magnetic field and it becomes bigger as the

device gets thinner

Vehicle Speed Sensor (VSS) functions to inform to the engine ECU and instrument cluster whether the

vehicle is idling status or driving status ECU controls idling speed control valve, canister purge valve,

torque converter, clutch, cruise control and speed sensitive auto door lock device of ETACS using this

signal Vehicle speed sensor is available in reed switch type embedded in speedometer and the hall

sensor type using the hall effects installed at the transmission

1.1.4.4 Operating Position Detection Sensor

[TPS Sensor] [APS Sensor] [Internal Structure of Sensor]

(1) TPS

TPS is installed on the throttle body and detects the opening amount of throttle valve ECU of engine

controls the fuel injection and ignition timing by determining the load status of engine with this output

voltage and is used as a signal that determines the idling status in some system Output voltage of

variable resistance type potentiometer changes depending on the opening amount of throttle valve

and TPS plays a role of detecting the opening amount of throttle valve using this Potentiometer is a

kind of variable resistor that is made up of lines of resistance or resistors The figure shows the operation

example of TPS Movement of throttle valve moves the vibrator of potentiometer and output voltage

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comes from the signal terminal depending on the movement of vibrator That is, it gives high voltage (up to 5V) when throttle valve fully opens and low voltage (close to 0V) when it fully closes When the throttle valve is between them, it outputs the value between supply voltage and OV

(2) APS

APS is the sensor applied to the vehicle mounted with ETC Since acceleration pedal, throttle body and wire are not mounted, ECU should recognize the position of acceleration pedal to control ETC APS is installed on the acceleration pedal to determine the acceleration will of driver APS determines the position of acceleration pedal using the potentiometer just like TPS APS is very important signal for safety of vehicle and has 2 output signals basically Output of APS2 gives ½ value of APS1 output at all times APS1 signal is the main signal and if APS1 signal is defective, ECU determines the will of driver for acceleration using APS2 signal Recently, several types of vehicles are mounted with organ pedal for better feeling of acceleration

1.1.4.5 Oxygen Sensor

Oxygen sensor is mounted at exhaust gas manifold to detect the air-fuel ratio from the oxygen density difference in the air and air density in exhaust gas That is, when the output voltage is high (about 1V), air-fuel ratio is concentrated, and if the output voltage is low (about 0V), air-fuel ratio is rare In addition, such change rapidly occurs around the theoretical air-fuel ratio Accordingly, engine ECU controls the fuel injection time to keep the fuel injection amount to theoretical air-fuel ratio by signal of oxygen sensor

As air pollution has emerged as a serious social problem, vehicle exhaust gas regulation has been reinforced and automobile companies have developed various technologies to cope with such

regulation of exhaust gas Among them, post-processing technology of exhaust gas using 3-way

catalytic converter is most widely used 3-way catalytic converter is the device that purifies the harmful exhaust gas using oxidation of HC, CO and reduction of Nox

3-way catalytic converter has the highest purification rate around theoretical air-fuel ratio If it is thicker than theoretical air-fuel ratio, discharge of CO and HC increases and if it is rarer than theoretical air-fuel ratio, discharge of Nox increases Accordingly, it is required to control combustion at theoretical air-fuel ratio for effective operation of 3-way catalytic converter It is called control of air- -

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control In the control of air-fuel ratio, it is required to examine whether combustion occurs at

theoretical air-fuel ratio and the oxygen sensor performs this function

There are 2 types of oxygen sensor depending on the devices used: zirconium oxide (ZrO2) type and

titanium oxide (TiO2) type Zirconia oxygen sensor detects the changes of electromotive force by

difference in oxygen density in the air and the oxygen density in the exhaust gas If the air-fuel ratio is

concentrated (if the density of oxygen in the exhaust gas is low), it generates high voltage close to

about 1V If the air fuel ratio is rare (if the density of oxygen in the exhaust gas is high), it generates low

voltage close to about 0V, and rapidly changes around the theoretical air-fuel ratio Titanium oxide

oxygen sensor detects the changes in resistance value depending on the difference in density of oxygen

and uses the property that resistance value rapidly changes around the theoretical air-fuel ratio

1.1.4.6 Switch Types

Switches are one of input elements and include brake, clutch, air-conditioner, ignition and power

steering switches Switch signal is sometimes installed at power or grounding line

In addition, it is divided into pull-down type or pull-up type

 Brake Switch: Brake switch signal is the signal that determines the operation of brake pedal For example,

when the brake switch signal is entered during cruise operation, it plays a role of releasing the cruise control

 Clutch Switch: Clutch switch is the signal that determines the operation of clutch and is used during

operation of cruise or at start-up

 Ignition Switch: When the ignition switch operates, power is supplied to all systems and components

 Inhibitor Switch: Inhibitor switch is the switch that detects the position of transmission lever and start-up is

possible only when P or N signal is entered to ECU In addition, if D or R signal is entered to ECU in idle status,

ECU increases idle rpm and compensates for the load of engine

 Power Steering Switch: Power steering pump is the device operated by engine power and idle rpm becomes

unstable when the power steering pump operates at the engine idle To compensate for this, when power

steering pump operates, switch On signal is entered to ECU Then ECU increases engine rpm to stabilize idle

rpm Recently, several types of vehicles complement steering using electric motors such as MDPS and EHPS

In these vehicles, power steering switch is removed

 A/C Switch: When the driver operates the air conditioner, engine idle rpm becomes unstable To compensate

for this, ECU increases engine idle rpm when the switch signal is entered

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Vehicles share information with other systems through communication For example, for vehicle speed signal, ECU receives vehicle speed information through communication line from ABS module In addition, TCU requests ECU to reduce torque and this signal is entered to EUC through communication line

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1.1.5 Actuator

1.1.5.1 Motor (H-Bridge)

Motor control using H bridge includes ETC (Electric Throttle Control) and MTC (Manifold Throttle Valve)

Above figure is Delphi type H-bridge motor operation circuit and the circuit is configured using 4

transistors When TR1 and TR4 operate in the circuit, IG power applies power to the motor via TR1 and

connects to the ground via TR4 so that the motor rotates clockwise

It is required to change the polarity at both ends of motor in order to change rotation direction at the

DC motor When TR2 and TR3 operate at the H bridge interface circuit, polarity changes at both ends of

the motor so that the motor rotates counterclockwise Motor has rotational inertia so that it rotates even

if power is cut off Since it is a throttle valve that controls the amounts of intake air, precision of control is

required ECU controls the throttle valve to the set track using the motor It controls the brake at the

motor and keeps the setting position

Brake control of DC motor stops when the closed circuit is configured based on the motor Whether it is

plus or minus, when the same polarity is approved to both ends of motor, the motor immediately stops

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Hands-on-Mark the items that pertain to ① the battery power input, ② sensor input and ③ actuator output

on the PCM circuit with a highlighter

① Battery Power Input (Red) Battery, ECU FUSE-1, 3 and 4, Engine Control Relay, Sensor Fuse, Power

Connection Terminal 1 2 3

② Sensor Input (Yellow) Rail Pressure Sensor, Fuel Tank Pressure Sensor, APT sensor, MAP Sensor, Oxygen Sensor, Battery Sensor, FF Sensor, CKP/CMP Sensor, Knock Sensor,

Water Temperature Sensor, APS, TPS

③ Actuator Output (Blue) Injector, Purge Control Solenoid Valve, Fuel Pressure Regulator Valve, Oil Control Valve, Canister Close Valve, Variable Intake Valve, Fuel Sensor & Pump,

Ignition Coil, ETC Motor

[Example]

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 Understand configuration circuit (check terminal signal reading)

 Understand the DTC items and detection conditions

 Measure and analyze service data

Hands-on-Complete the following tasks on PCM input/output items

Input/Output Items

Power Input

(1) Engine control relay (2) Battery power (3) MAP sensor (4) Oxygen sensor (5) Throttle position sensor (6) Crankshaft position sensor Sensor Signals Input (7) Camshaft position sensor

(8) ETC motor Actuator Output (9) Ignition coil

(10) Injector

Task

① Complete the circuit Complete the given circuit

② Organize DTCs Find the DTC that corresponds to the presented condition

③ Measure service data Measure and record the relevant service data

④ Check symptoms when disconnected Check DTC and symptoms in case of disconnection

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1.2.2.1 Power Input & Engine Control Relay

Complete the missing part of the circuit diagram and fill in the functions for each terminal in the PCM

blank space

Check signal value for each terminal

Terminal Signal Name Condition Signal Value

3, 5, 6 Engine Control Relay IG ON 12V

75, 58 Battery Power (B+) Hot at all time 12V

41 Battery Power (ON/START) IG ON 12V

53 Engine Control Relay

Control

IG OFF 12V IG OFF 12V

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1.2.2.2 MAP Sensor

blank space

59 Air Intake Temperature Sensor Signal Input Idle 2.55V

61 Air Intake Temperature Sensor Ground - 0V

82 MAP Sensor Signal Input Idle 0.8~1.6V

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In case the air intake temperature change after IG ON

is lower than the spec value

Intake Air Temperature Sensor 1 Circuit Low Input

In case the Air Intake Temperature Sensor signal value is lower than 0.22V

Intake Air Temperature Sensor 1 Circuit High Input

In case the Air Intake Temperature Sensor signal value is higher than 4.93V

(4) Service Data

Measure and record the service data from the following items

Acceleration

In case of disconnectio

n

Engine RPM Air Intake Pressure (MAP) Sensor - Voltage

Air Intake Pressure (MAP) Sensor

Air Intake Temperature Sensor - Voltage

Air Intake Temperature Sensor

Check the DTC and symptoms that occur after disconnecting the MAP Sensor connector

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1.2.2.3 Oxygen Sensor

blank space

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14 Oxygen Sensor (B1S2) Signal Input Idle 0.1~0.9V

83 Pumping Cell Voltage (Rc/Rp) Idle

Normal Reading: 455mV±50mV Concentrated: Max Normal Reading+150Mv Lean: Minimum Normal Reading-150mV

84 Virtual Ground (VS-/IP-) Idle

88 Oxygen Sensor (B1S1) Heater Control Idle 8~10Hz / 0~100%

89 Oxygen Sensor (B1S2) Heater Control Idle 8~10Hz / 0~100%

104 Compensated Resistance (Rc) Idle Rc-Rc/Rp < ±0.1V

105 Nernst Cell Voltage (VS+) Idle

Normal Reading: 455mV±50mV Concentrated: Max Normal Reading+150mV Lean: Minimum Normal Reading-150mV

1 Sensor 1) In case the value is shown as lean in fuel increasing mode O2 Sensor Pumping Current

Circuit/Open (Bank 1 Sensor 1)

In case fixed signal on the front linear sensor pumping current detection circuit is detected

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Measure the service data for the following items with graph and then record the summary

Item IG ON Idle In case of disconnection

Oxygen Sensor Voltage (B1S1) - Linear 2.0V 1.9~2.0V

Oxygen Sensor Voltage (B1S2) - Binary 0.4V 0.7V

Oxygen Sensor Heating Time (B1S1) 0% 29~32%

Oxygen Sensor Heating Time (B1S2) 0% 46~48%

 Measuring Condition

ⓐ Idle →ⓑ Slow Acceleration (3,000RPM) →ⓒ Deceleration →ⓓ Sudden Acceleration (3,000RPM) →

ⓔ Deceleration

 Engine RPM

 Oxygen Sensor Voltage (B1S1) Linear

 Oxygen Sensor Voltage (B1S2) Binary

Check the DTC and symptoms that occur after disconnecting the Oxygen Sensor connector

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1.2.2.4 Throttle Position Sensor and ETC Motor

Complete the missing part of the circuit diagram and fill in the functions for each terminal in the PCM blank space

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P0122 Throttle/Pedal Position Sensor / Switch

'A' Circuit Low Input In case the TPS1 signal value is lower than 0.12V

P0123 Throttle/Pedal Position Sensor / Switch

'A' Circuit High Input In case the TPS1 signal value is higher than 4.9V

Throttle Actuator Control Range / Performance (Bank 1)

In case the actual position of the throttle valve after activating the ETC motor is different from the target position

P2101 Throttle Actuator Control Motor Circuit

Range / Performance In case the ETC motor wiring is shorted or disconnected

P2104 Throttle Actuator Control System -

P2106 Throttle Actuator Control System

Force Limited Power

Entering the emergency mode incase of failure of the TPS1

Throttle Position Sensor 2 - Voltage

Power supplied to the TPS ETC Motor Duty

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1.2.2.5 CKPS and CMPS

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(2) Terminal Information

Terminal Information: Check signal value for each terminal

8 Crank Shaft Position Sensor (CKPS) Input Engine Running 0V-5V (850Hz~3,000Hz)

29 CMPS (Bank 1/Intake) Signal Input Engine Running 0V-5V (7Hz~25Hz)

(3) DTC (Error Code)

Find the DTC items relevant to the CKP&CMP Sensor and fill in the blank space

P0335 Crankshaft Position Sensor

'A' Circuit In case CKPS signal is not received while CMPS signal is detected

Crankshaft Position Sensor 'A' Circuit

Range/Performance

In case CKPS signal's reference point signal is not received after IG

ON

P0340 Camshaft Position Sensor 'A'

Circuit (Single Sensor)

In case the CMPS (intake) signal is received but at high or low voltage

P0341

Camshaft Position Sensor 'A' Circuit Range / Performance (Bank 1)

In case abnormal CMPS (intake) signal is received

P0365 Camshaft Position Sensor 'A'

Circuit Maifunction (Bank 1)

In case the CMPS (exhaust) signal is received but at high or low voltage

Camshaft Position Sensor 'B' Circuit Range / Performance (Bank 1)

In case abnormal CMPS (exhaust) signal is received

Measure the CKPS/CMPS simultaneous wave signal and then draw the wave in the blank

 Reference Point as the basis

CMPS (intake)

CMPS (exhaust)

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CKPS

※Reference Data

1.2.2.6 Ignition Device (Ignition Coil)

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Signal Name Condition Signal Value

1 Ignition Coil (Cylinder #2) Control Engine

Running Peak Voltage 360~440V

Ignition Control Wave Output

Running

Running Peak Voltage 360~440V

Ignition Control Wave Output

Ignition Coil Control

 Ignition Time

 Peak Voltage

 Power-TR Base Voltage/Time

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Name IG ON Idle 2000RPM In case of disconnection

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(2) Terminal Information

Terminal Signal Name Condition Signal Value

73 Injector (Cylinder #1) High Control Engine

Running Peak Voltage 55V Injection Control Wave

P0261 Cylinder 1 Injector Circuit

Low In case the control wiring "-" on the injector drive circuit is shorted

Measure the output waveform and than draw a rough sketch of the wave form

Injector Control Line

 Fuel Injection Time

 Drive Surge Voltage (High/Low)

Name IG ON Idle 2000RPM In case of disconnection

Engine RPM – Cyl 1 Fuel Injection Time

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1.2.2.8 Other Input/Output Devices

Fuel tank pressure

sensor

Check fuel tank pressure to detect leakage of vapor gas in accordance with the OBD regulation

in the A/C compressor

① Sensor Ground

② APT Sensor Signal Input

③ Sensor Power (5V) Smart Key Module Driver authentication signal received by the

Push Button Start System

① Smart Key Module Communication Line (K-LINE)

Battery Sensor Inputs sensor signal to calculate the SOC value

for controlling the alternator current ① LIN Communication Signal Input

Power Distribution

Module (PDM)

Transmits engine RPM signal to the PDM after

IG ON (used to cut off start signal)

① Frequency Signal Output (21Hz~100Hz)

① PWM Pulse Signal (High)

② PWM Pulse Signal (Low)

Oil Control Valve Controls the Oil Control Valve (OCV) to advance

or retard the valve timing in the CVVT System

① Ground Control When Closed (0V)

1 Sensor Power #2 (15A)

Variable Intake

Valve

Valve that variably controls the path (length or volume) of the intake manifold based on the engine RPM and load

1 Sensor Power #2 (15A)

② Ground Control Based on Open/Closed

Knock Sensor Controls knocking by detecting the knocking in

the engine

① Irregular Frequency

② Sensor Ground

Alternator Alternator is controlled by the PCM when

regulating generated current

① PWM Signal Output (125Hz)

③ Current Load Signal Input

Cooling Fan

Control Cooling Fan Relay Control (High/Low)

① Cooling Fan Relay (High) Control

② Cooling Fan Relay (Low) Control

ABS/VDC Communication line between ABS/ESC

modules ① Vehicle Speed Signal Input Water

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Sensor & Sender ④ Sensor Ground

1.2.3.1 Measuring Service Data

Measure and record the sensor output reading from the following items (accurately record the

measurement unit)

Engine Revolutions per Minute (RPM)

Manifold Absolute Pressure Sensor

(MAPS) Air-Fuel Ratio Learning Control

Air-Fuel Ratio Check & Compensation

Oxygen Sensor Voltage (B1S1) - Linear

Oxygen Sensor Voltage (B1S2) - Binary

System too Rich at idle (Bank 1)

In case when the air-fuel ratio goes over the limit due to decreased amount of fuel after the oxygen sensor signal detected concentrated state in idle mode (in case of maintaining the limit value for over 20 seconds within 90 second period)

P2191 System too lean at higher Load

(Multiple)(Bank 1)

In case when the air-fuel ratio goes over the limit due to increased amount of fuel after the oxygen sensor signal detected lean state in partial load mode (in case of maintaining the limit value for over 20 seconds within 90 second period)

P2192 System too Rich at higher Load (Bank

1)

In case when the air-fuel ratio goes over the limit due to decreased amount of fuel after the oxygen sensor signal detected concentrated state in partial load mode (in case of maintaining the limit value for over 20 seconds within 90 second period)

Trang 40

Quiz !

Do you now understand the major components of the ETC gasoline engine? Then let's review the circuit once again What DTC will be indicated in the below circuit diagram if the ① fuse (sensor 15A) is disconnected?

Possible Symptom: _

Displayed DTC: _

Tiêu đề	Diagnosis of Gasoline Engine System
Trường học	Hyundai Motor Company
Chuyên ngành	Automotive Engineering
Thể loại	Maintenance Manual

Định dạng
Số trang	182
Dung lượng	5,33 MB