HỆ THỐNG điều KHIỂN ĐỘNG cơ NISSAN 2001

HỆ THỐNG ĐIỀU KHIỂN ĐỘNG CƠ NISSAN ĐỜI 2001

Trang 1

SECTION EC

CONTENTS

DIAGNOSTIC TROUBLE CODE INDEX 4

Alphabetical & P No Index for DTC 4

PRECAUTIONS AND PREPARATION 6

Special Service Tools 6

Commercial Service Tools 6

Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” 8

Precautions for On Board Diagnostic (OBD) System of Engine and A/T 8

Engine Fuel & Emission Control System 9

Precautions 10

ENGINE AND EMISSION CONTROL OVERALL SYSTEM 12

Circuit Diagram 12

Engine Control Component Parts Location 13

System Diagram 15

Vacuum Hose Drawing 16

System Chart 17

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION 18

Multiport Fuel Injection (MFI) System 18

Distributor Ignition (DI) System 20

Air Conditioning Cut Control 21

Fuel Cut Control 22

EVAPORATIVE EMISSION SYSTEM 23

Description 23

Inspection 23

Evaporative Emission Line Drawing 26

On Board Refueling Vapor Recovery (ORVR) 28

POSITIVE CRANKCASE VENTILATION 33

Description 33

Inspection 33

BASIC SERVICE PROCEDURE 34

Fuel Pressure Release 34

Fuel Pressure Check 34

Fuel Pressure Regulator Check 35

Injector Removal and Installation 35

Fast Idle Cam (FIC) 35

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment 37

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION 45

Introduction 45

Two Trip Detection Logic 45

Emission-related Diagnostic Information 46

Malfunction Indicator Lamp (MIL) 60

OBD System Operation Chart 60

CONSULT-II 66

Generic Scan Tool (GST) 77

TROUBLE DIAGNOSIS — Introduction 79

Introduction 79

Diagnostic Worksheet 79

TROUBLE DIAGNOSIS — Work Flow 81

Work Flow 81

Description for Work Flow 82

TROUBLE DIAGNOSIS — Basic Inspection 83

Basic Inspection 83

TROUBLE DIAGNOSIS — General Description 89

Diagnostic Trouble Code (DTC) Inspection Priority Chart 89

Fail-Safe Chart 90

Symptom Matrix Chart 91

CONSULT-II Reference Value in Data Monitor Mode 94

Major Sensor Reference Graph in Data Monitor Mode 96

ECM Terminals and Reference Value 98

TROUBLE DIAGNOSIS — SPECIFICATION VALUE 108

Description 108

Testing Condition 108

Inspection Procedure 108

Diagnostic Procedure 109

TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT 112

Description 112

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 2

Common I/I Report Situations 112

Diagnostic Procedure 112

TROUBLE DIAGNOSIS FOR POWER SUPPLY 113

Main Power Supply and Ground Circuit 113

TROUBLE DIAGNOSIS FOR DTC P0100 118

Mass Air Flow Sensor (MAFS) 118

Absolute Pressure Sensor 127

Intake Air Temperature Sensor 129

Engine Coolant Temperature Sensor (ECTS) 134

Throttle Position Sensor 139

Engine Coolant Temperature (ECT) Sensor 151

Heated Oxygen Sensor 1 (Front) (Circuit) 156

Heated Oxygen Sensor 1 (front) (Lean Shift Monitoring) 163

Heated Oxygen Sensor 1 (Front) (Rich Shift Monitoring) 170

Heated Oxygen Sensor 1 (Front) (Response Monitoring) 178

Heated Oxygen Sensor 1 (Front) (High Voltage) 186

Heated Oxygen Sensor 1 Heater (Front) 192

Heated Oxygen Sensor 2 (Rear) (Min Voltage Monitoring) 196

Heated Oxygen Sensor 2 (Rear) (Max Voltage Monitoring) 204

Heated Oxygen Sensor 2 (Rear) (Response Monitoring) 212

Heated Oxygen Sensor 2 (Rear) (High Voltage) 219

Heated Oxygen Sensor 2 Heater (Rear) 225

Fuel Injection System Function (Lean side) 230

Fuel Injection System Function (Rich side) 235

Fuel Tank Temperature Sensor 240

TROUBLE DIAGNOSIS FOR DTC P0300 -P0304 244

No 4 - 1 Cylinder Misfire, Multiple Cylinder Misfire 244

Knock Sensor (KS) 249

Crankshaft Position Sensor (CKPS) (OBD) 254

Camshaft Position Sensor (CMPS) 259

EGR Function (Close) 266

EGRC-BPT Valve Function 275

Three Way Catalyst Function 280

Evaporative Emission (EVAP) Control System (Small Leak) (Negative Pressure) 284

Evaporative Emission (EVAP) Canister Purge Volume Control Solenoid Valve 293

Evaporative Emission (EVAP) Canister Vent Control Valve (Circuit) 299

Evaporative Emission (EVAP) Control System Pressure Sensor 304

Evaporative Emission (EVAP) Control System (Large Leak) 310

Fuel Level Sensor Function (Slosh) 318

Fuel Level Sensor Function 321

Fuel Level Sensor Circuit 323

Vehicle Speed Sensor (VSS) 326

Idle Air Control Valve (IACV) — Auxiliary Air Control (AAC) Valve 330

Closed Throttle Position Switch 335

A/T Control 341

Engine Control Module (ECM) 345

Trang 3

Thermostat Function 347

Closed Loop Control 348

Crankshaft Position Sensor (CKPS) (OBD) (COG) 351

EGRC-Solenoid Valve 356

EGR Temperature Sensor 361

EGR Function (Open) 367

Evaporative Emission (EVAP) Control System (Small Leak) (Positive Pressure) 374

Evaporative Emission (EVAP) Control System (Very Small Leak) 376

Evaporative Emission (EVAP) Canister Purge Volume Control Solenoid Valve 386

Evaporative Emission (EVAP) Canister Vent Control Valve (Close) 393

Evaporative Emission (EVAP) Control System Purge Flow Monitoring 398

Evaporative Emission (EVAP) Canister Vent Control Valve (Open) 405

Fuel Level Sensor Circuit (Ground signal) 412

Vacuum Cut Valve Bypass Valve (Circuit) 415

Vacuum Cut Valve Bypass Valve 420

A/T Diagnosis Communication Line 425

Park/Neutral Position (PNP) Switch 428

TROUBLE DIAGNOSIS FOR OVERHEAT 433

Overheat 433

TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS 445

Ignition Signal 445

Injector 451

Start Signal 454

Fuel Pump 457

Power Steering Oil Pressure Switch 463

IACV-FICD Solenoid Valve 467

Electric Load Signal 471

MIL & Data Link Connectors 474

SERVICE DATA AND SPECIFICATIONS (SDS) 475

General Specifications 475

Inspection and Adjustment 475

When you read wiring diagrams:

쎲 Read GI section, ‘‘HOW TO READ WIRING DIAGRAMS’’.

쎲 Read EL section, ‘‘POWER SUPPLY ROUTING’’ for power distribution circuit.

When you perform trouble diagnoses, read GI section, ‘‘HOW TO FOLLOW FLOW CHART IN TROUBLE DIAGNOSES’’ and ‘‘HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT’’.

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 4

Alphabetical & P No Index for DTCALPHABETICAL INDEX FOR DTC

Items

(CONSULT-II screen terms)

DTC*4

Reference page CONSULT-II

GST*1 Unable to access ECM — EC-90

*COOLAN T SEN/CIRC P0125 EC-151

A/T 1ST GR FNCTN P0731 AT-95

A/T 2ND GR FNCTN P0732 AT-101

A/T 3RD GR FNCTN P0733 AT-107

A/T 4TH GR FNCTN P0734 AT-113

A/T COMM LINE P0600 EC-341

A/T DIAG COMM LINE P1605 EC-425

A/T TCC S/V FNCTN P0744 AT-125

ABSL PRES SEN/CIRC P0105 EC-127

AIR TEMP SEN/CIRC P0110 EC-129

ATF TEMP SEN/CIRC P0710 AT-83

CMP SEN/CIRCUIT P0340 EC-259

CLOSED LOOP-B1 P1148 EC-348

CLOSED TP SW/CIRC P0510 EC-335

COOLANT T SEN/CIRC P0115 EC-134

CKP SENSOR (COG) P1336 EC-351

CKP SEN/CIRCUIT P0335 EC-254

CYL 1 MISFIRE P0301 EC-244

EGR TEMP SEN/CIRC P1401 EC-361

EGRC SOLENOID/V P1400 EC-356

EGRC-BPT VALVE P0402 EC-275

ENGINE SPEED SIG P0725 AT-92

EVAP PURG FLOW/MON P1447 EC-398

EVAP SMALL LEAK P0440 EC-284

EVAPO SYS PRES SEN P0450 EC-304

EVAP GROSS LEAK P0455 EC-310

EVAP SMALL LEAK P1440 EC-374

EVAP VERY SML LEAK P1441 EC-376

FUEL LEVL SEN/CIRC P0464 EC-323

FUEL LEV SEN SLOSH P0460 EC-318

FUEL LEVEL SENSOR P0461 EC-321

FUEL LEVL SEN/CIRC P1464 EC-412

FUEL SYS-LEAN BK1 P0171 EC-230

FUEL SYS-RICH BK1 P0172 EC-235

FUEL TEMP SEN/CIRC P0180 EC-240

Items (CONSULT-II screen terms)

DTC*4

Reference page CONSULT-II

EL-257

NO DTC IS DETECTED THER TESTING MAY BE REQUIRED.

TP SEN/CIRC A/T*2 P1705 AT-148

TW CATALYST SYS-B1 P0420 EC-280

VC CUT/V BYPASS/V P1491 EC-420 VC/V BYPASS/V P1490 EC-415 VEH SPD SEN/CIR AT*3 P0720 AT-88 VEH SPEED SEN/CIRC*3 P0500 EC-326 VENT CONTROL VALVE P1446 EC-393 VENT CONTROL VALVE P1448 EC-405 VENT CONTROL VALVE P0446 EC-299

*1: These numbers are prescribed by SAE J2012.

*2: When the fail-safe operation occurs, the MIL nates.

illumi-*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor” meet the fail- safe condition at the same time.

*4: 1st trip DTC No is the same as DTC No.

Trang 5

P NO INDEX FOR DTC

DTC*4

Items (CONSULT-II screen terms) Reference pageCONSULT-II

GST*1

— Unable to access ECM EC-90

— NATS MALFUNC EC-59 or EL

P0100 MAF SEN/CIRCUIT*2 EC-118

P0105 ABSL PRES SEN/CIRC EC-127

P0110 AIR TEMP SEN/CIRC EC-129

P0115 COOLANT T SEN/CIRC EC-134

P0120 THRTL POS SEN/CIRC*2 EC-139

P0125 *COOLAN T SEN/CIRC EC-151

P0171 FUEL SYS-LEAN/BK1 EC-230

P0172 FUEL SYS-RICH/BK1 EC-235

P0180 FUEL TEMP SEN/CIRC EC-240

P0300 MULTI CYL MISFIRE EC-244

P0301 CYL 1 MISFIRE EC-244

P0325 KNOSK SEN/CIRC-B1 EC-249

P0335 CKP SEN/CIRCUIT EC-254

P0340 CMP SEN/CIRCUIT EC-259

P0400 EGR SYSTEM EC-266

P0402 EGRC-BPT VALVE EC-275

P0420 TW CATALYST SYS-B1 EC-280

P0440 EVAP SMALL LEAK EC-284

P0443 PURG VOLUME CONT/V EC-293

P0446 VENT CONTROL VALVE EC-299

P0450 EVAPO SYS PRES SEN EC-304

P0455 EVAP GROSS LEAK EC-310

P0460 FUEL LEV SEN SLOSH EC-318

P0461 FUEL LEVEL SENSOR EC-321

P0464 FUEL LEVL SEN/CIRC EC-323

P0500 VEH SPEED SEN/CIRC*3 EC-326

P0505 IACV/AAC VLV/CIRC EC-330

DTC*4

Items (CONSULT-II screen terms) Reference pageCONSULT-II

GST*1 P0510 CLOSED TP SW/CIRC EC-335 P0600 A/T COMM LINE EC-341

P0705 PNP SW/CIRC AT-78 P0710 ATF TEMP SEN/CIRC AT-83 P0720 VEH SPD SEN/CIR AT*3 AT-88 P0725 ENGINE SPEED SIG AT-92 P0731 A/T 1ST GR FNCTN AT-95 P0732 A/T 2ND GR FNCTN AT-101 P0733 A/T 3RD GR FNCTN AT-107 P0734 A/T 4TH GR FNCTN AT-113 P0740 TCC SOLENOID/CIRC AT-120 P0744 A/T TCC S/V FNCTN AT-125 P0745 L/PRESS SOL/CIRC AT-133 P0750 SFT SOL A/CIRC*2 AT-138 P0755 SFT SOL B/CIRC*2 AT-143 P1126 THERMSTAT FNCTN EC-347 P1148 CLOSED LOOP-B1 EC-348 P1336 CKP SENSOR (COG) EC-351 P1400 EGRC SOLENOID/V EC-356 P1401 EGR TEMP SEN/CIRC EC-361 P1402 EGR SYSTEM EC-367 P1440 EVAP SMALL LEAK EC-374 P1441 EVAP VERY SML LEAK EC-376 P1444 PURG VOLUME CONT/V EC-386 P1446 VENT CONTROL VALVE EC-393 P1464 FUEL LEVL SEN/CIRC EC-412 P1447 EVAP PURG FLOW/MON EC-398 P1448 VENT CONTROL VALVE EC-405 P1490 VC/V BYPASS/V EC-415 P1491 VC CUT/V BYPASS/V EC-420 P1605 A/T DIAG COMM LINE EC-425 P1705 TP SEN/CIRC A/T*2 AT-148 P1706 P-N POS SW/CIRCUIT EC-428 P1760 O/R CLTCH SOL/CIRC AT-154

*1: These numbers are prescribed by SAE J2012.

*2: When the fail-safe operation occurs, the MIL nates.

illumi-*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor” meet the fail- safe condition at the same time.

*4: 1st trip DTC No is the same as DTC No.

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 6

Special Service Tools

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

open-Commercial Service Tools

Tool name Description

Leak detector

(J41416)

NT703

When locating the EVAP leak

EVAP service port adapter

Trang 7

Tool name Description

Oxygen sensor thread

a: J-43897-18 18 mm diameter, for Zirconia Oxygen Sensor

b: J-43897-12 12 mm diameter, for Titania Oxygen Sensor

Anti-seize lubricant

(Perma-tex TM 133AR or equivalent

meeting MIL specification

MIL-A-907)

NT779

Lubricating oxygen sensor thread cleaning tool when reconditioning exhaust system threads.

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 8

Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used alongwith a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certaintypes of collision The SRS system composition which is available to NISSAN MODEL L30 is as follows(The composition varies according to the optional equipment):

쎲 For a frontal collision

The Supplemental Restraint System consists of driver air bag module (located in the center of thesteering wheel), front passenger air bag module (located on the instrument panel on passenger side),seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable

쎲 For a side collision

The Supplemental Restraint System consists of side air bag module (located in the outer side of frontseat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision),wiring harness, warning lamp (one of components of air bags for a frontal collision)

Information necessary to service the system safely is included in the RS section of this Service Manual.

WARNING:

쎲 To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must

be performed by an authorized NISSAN dealer.

쎲 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module, see the RS section.

쎲 Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual Spiral cable and wiring harnesses (except “SEAT BELT PRE-TEN- SIONER”) covered with yellow insulation either just before the harness connectors or for the complete harness are related to the SRS.

Precautions for On Board Diagnostic (OBD) System of Engine and A/T

The ECM has an on board diagnostic system It will light up the malfunction indicator lamp (MIL) to warnthe driver of a malfunction causing emission deterioration

CAUTION:

쎲 Be sure to turn the ignition switch “OFF” and disconnect the negative battery terminal before any repair or inspection work The open/short circuit of related switches, sensors, solenoid valves, etc will cause the MIL to light up.

쎲 Be sure to connect and lock the connectors securely after work A loose (unlocked) tor will cause the MIL to light up due to the open circuit (Be sure the connector is free from water, grease, dirt, bent terminals, etc.)

connec-쎲 Certain systems and components, especially those related to OBD, may use a new style slide-locking type harness connector.

For description and how to disconnect, refer to EL-5 section (“Description”, “HARNESS NECTOR”).

CON-쎲 Be sure to route and secure the harnesses properly after work The interference of the ness with a bracket, etc may cause the MIL to light up due to the short circuit.

har-쎲 Be sure to connect rubber tubes properly after work A misconnected or disconnected rubber tube may cause the MIL to light up due to the malfunction of the EGR system or fuel injection system, etc.

쎲 Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and TCM (Transmission control module) before returning the vehicle to the customer.

Trang 9

Engine Fuel & Emission Control System

AEC878A

GI

MA EM LC

EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 10

Precautions

쎲 Before connecting or disconnecting the ECM harness connector, turn ignition switch OFF and disconnect negative battery terminal Failure to do so may damage the ECM because battery voltage is applied to ECM even if ignition switch is turned off.

SEF308Q

쎲 When connecting ECM harness connector, tighten securing bolt until the gap between orange indicators disappears.

: 3.0 - 5.0 N䡠m(0.3 - 0.5 kg-m, 26 - 43 in-lb)

SEF291H

쎲 When connecting or disconnecting pin connectors into

or from ECM, take care not to damage pin terminals (bend or break).

Make sure that there are not any bends or breaks on ECM pin terminal, when connecting pin connectors.

MEF040D

쎲 Before replacing ECM, perform Terminals and ence Value inspection and make sure ECM functions properly Refer to EC-98.

Refer-SEF217U

쎲 After performing each TROUBLE DIAGNOSIS, perform

“OVERALL FUNCTION CHECK” or “DTC (Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.

The DTC should not be displayed in the “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE” if the

CHECK” should be a good result if the repair is pleted.

Trang 11

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 12

Circuit Diagram

WEC121A

Trang 13

Engine Control Component Parts Location

SEF739Z

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 14

SEF469UA SEF468UA

(Cont’d)

Trang 15

System Diagram

SEF849Z

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 16

Vacuum Hose Drawing

Trang 17

System Chart

Camshaft position sensor 䉴

ECM

Mass air flow sensor 䉴

Engine coolant temperature sensor 䉴

Heated oxygen sensor 1 (front) 䉴

Ignition switch 䉴

Throttle position sensor 䉴

*4

Closed throttle position switch 䉴

Park/neutral position (PNP) switch 䉴

Air conditioner switch 䉴

Intake air temperature sensor 䉴

*1

쎲 EGR temperature sensor

쎲 EVAP control system pressure

sensor

쎲 Fuel level sensor

䉴

Battery voltage 䉴

Power steering oil pressure switch 䉴

Vehicle speed sensor 䉴

Ambient air temperature switch 䉴

Fuel injection & mixture ratio

Distributor ignition system 䉴 Power transistor

Idle air control system 䉴 IACV-AAC valve and

IACV-FICD solenoid valve

Fuel pump control 䉴 Fuel pump relay

On board diagnostic system 䉴 Malfunction indicator lamp(On the instrument panel)

EGR control 䉴 EGRC-solenoid valve

Heated oxygen sensor 1 heater (front) control 䉴 Heated oxygen sensor 1 heater

*1: These sensors are not used to control the engine system They are used only for the on board diagnosis.

*2: The DTC related to A/T will be sent to ECM.

*3: This sensor is not used to control the engine system under normal conditions.

*4: This switch will operate in place of the throttle position sensor to control EVAP parts if the sensor malfunctions.

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 18

Multiport Fuel Injection (MFI) SystemINPUT/OUTPUT SIGNAL LINE

Camshaft position sensor Engine speed and piston position 䉴

Mass air flow sensor Amount of intake air 䉴

Engine coolant temperature sensor Engine coolant temperature 䉴

Heated oxygen sensor 1 (front) Density of oxygen in exhaust gas 䉴

Throttle position sensor Throttle position 䉴

Throttle valve idle position Park/neutral position (PNP) switch Gear position 䉴

Air conditioner switch

䉴 Air conditioner operation

Knock sensor Engine knocking condition 䉴

Electrical load Electrical load signal 䉴

Power steering oil pressure switch Power steering operation 䉴

Heated oxygen sensor 2 (rear)* Density of oxygen in exhaust gas 䉴

* Under normal conditions, this sensor is not for engine control operation.

BASIC MULTIPORT FUEL INJECTION

SYSTEM

The amount of fuel injected from the fuel injector

is determined by the ECM The ECM controls the

length of time the valve remains open (injection

pulse duration) The amount of fuel injected is a

program value in the ECM memory The program

value is preset by engine operating conditions

These conditions are determined by input signals

(for engine speed and intake air) from both the

camshaft position sensor and the mass air flow

쎲 When selector lever is changed from “N” to

“D” (A/T models only)

쎲 High-load, high-speed operation

쎲 During deceleration

쎲 During high engine speed operation

Trang 19

This stage is referred to as the closed loop control condition.

Heated oxygen sensor 2 (rear) is located downstream of thethree way catalyst Even if the switching characteristics of theheated oxygen sensor 1 (front) shift, the air-fuel ratio is con-trolled to stoichiometric by the signal from the heated oxygensensor 2 (rear)

OPEN LOOP CONTROL

The open loop system condition refers to when the ECM detectsany of the following conditions Feedback control stops in order

to maintain stabilized fuel combustion

쎲 Deceleration and acceleration

쎲 High-load, high-speed operation

쎲 Malfunction of heated oxygen sensor 1 (front) or its circuit

쎲 Insufficient activation of heated oxygen sensor 1 (front) atlow engine coolant temperature

쎲 High engine coolant temperature

쎲 During warm-up

쎲 When starting the engine

MIXTURE RATIO SELF-LEARNING CONTROL

The mixture ratio feedback control system monitors the mixtureratio signal transmitted from the heated oxygen sensor 1 (front).This feedback signal is then sent to the ECM The ECM controlsthe basic mixture ratio as close to the theoretical mixture ratio aspossible However, the basic mixture ratio is not necessarily con-trolled as originally designed Both manufacturing differences(i.e., mass air flow sensor hot film) and characteristic changesduring operation (i.e., injector clogging) directly affect mixture ratio.Accordingly, the difference between the basic and theoreticalmixture ratios is monitored in this system This is then computed

in terms of “injection pulse duration” to automatically sate for the difference between the two ratios

compen-“Fuel trim” refers to the feedback compensation value comparedagainst the basic injection duration Fuel trim includes shortterm fuel trim and long term fuel trim

“Short term fuel trim” is the short-term fuel compensation used

to maintain the mixture ratio at its theoretical value The signalfrom the heated oxygen sensor 1 (front) indicates whether themixture ratio is RICH or LEAN compared to the theoreticalvalue The signal then triggers a reduction in fuel volume if themixture ratio is rich, and an increase in fuel volume if it is lean

“Long term fuel trim” is overall fuel compensation carried outlong-term to compensate for continual deviation of the shortterm fuel trim from the central value Such deviation will occurdue to individual engine differences, wear over time andchanges in the usage environment

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 20

FUEL INJECTION TIMING

Two types of systems are used

Sequential multiport fuel injection system

Fuel is injected into each cylinder during each engine cycleaccording to the firing order This system is used when theengine is running

MEF523D

Simultaneous multiport fuel injection system

Fuel is injected simultaneously into all four cylinders twice eachengine cycle In other words, pulse signals of the same widthare simultaneously transmitted from the ECM

The four injectors will then receive the signals two times for eachengine cycle

This system is used when the engine is being started and/or ifthe fail-safe system (CPU) is operating

FUEL SHUT-OFF

Fuel to each cylinder is cut off during deceleration or operation

of the engine at excessively high speeds

Distributor Ignition (DI) SystemINPUT/OUTPUT SIGNAL LINE

Camshaft position sensor Engine speed and piston position 䉴

ECM 䉴 Power

tran-sistor

Mass air flow sensor Amount of intake air 䉴

Throttle valve idle position

Park/Neutral position (PNP) switch Gear position 䉴

Battery voltage

TCM (Transmission control module) A/T gear shifting 䉴

Trang 21

e.g., N: 1,800 rpm, Tp: 1.50 msec

A°BTDCDuring the following conditions, the ignition timing is revised bythe ECM according to the other data stored in the ECM

If engine knocking occurs, the knock sensor monitors the dition The signal is transmitted to the ECM The ECM retardsthe ignition timing to eliminate the knocking condition

con-Air Conditioning Cut ControlINPUT/OUTPUT SIGNAL LINE

Air conditioner switch Air conditioner “ON” signal 䉴

Air conditioner relay

Throttle position sensor Throttle valve opening angle 䉴

Camshaft position sensor Engine speed 䉴

Power steering oil pressure switch Power steering operation 䉴

SYSTEM DESCRIPTION

This system improves engine operation when the

air conditioner is used

Under the following conditions, the air conditioner

is turned off

쎲 When the accelerator pedal is fully depressed

쎲 When cranking the engine

쎲 At high engine speeds

쎲 When the engine coolant temperaturebecomes excessively high

쎲 When operating power steering during lowengine speed or low vehicle speed

쎲 When engine speed is excessively low

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 22

Fuel Cut Control (at no load & high engine speed)

INPUT/OUTPUT SIGNAL LINE

ECM 䉴 Injectors

Park/Neutral position (PNP) switch Neutral position 䉴

Camshaft position sensor Engine speed 䉴

If the engine speed is above 4,000 rpm with no load, (forexample, in neutral and engine speed over 4,000 rpm) fuel will

be cut off after some time The exact time when the fuel is cutoff varies based on engine speed

Fuel cut will operate until the engine speed reaches 2,000 rpm,then fuel cut is cancelled

NOTE:

This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”, EC-18.

Trang 23

SEF222U

The evaporative emission system is used to reduce bons emitted into the atmosphere from the fuel system Thisreduction of hydrocarbons is accomplished by activated char-coals in the EVAP canister

hydrocar-The fuel vapor in the sealed fuel tank is led into the EVAP ister which contains activated carbon and the vapor is storedthere when the engine is not operating or when refueling to thefuel tank

can-The vapor in the EVAP canister is purged by the air through thepurge line to the intake manifold when the engine is operating.EVAP canister purge volume control solenoid valve is controlled

by engine control module When the engine operates, the flowrate of vapor controlled by EVAP canister purge volume controlsolenoid valve is proportionally regulated as the air flowincreases

EVAP canister purge volume control solenoid valve also shutsoff the vapor purge line during decelerating and idling

SEF470U

Inspection

EVAP CANISTER

Check EVAP canister as follows:

1 Pinch the fresh air hose

2 Blow air into port䊊A and check that air flows freely throughport 䊊B

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 24

TIGHTENING TORQUE

Tighten EVAP canister as shown in the figure

Make sure new O-ring is installed properly between EVAP canister and EVAP vent control valve.

SEF427N

SEF943S

FUEL TANK VACUUM RELIEF VALVE (Built into fuel filler cap)

1 Wipe clean valve housing

2 Check valve opening pressure and vacuum

Pressure:

16.0 - 20.0 kPa (0.163 - 0.204 kg/cm 2 , 2.32 - 2.90 psi)

Trang 25

EVAP SERVICE PORT

Positive pressure is delivered to the evaporator system throughthe evaporator service port If fuel vapor leakage in the evapo-rator system occurs, use a leak detector to locate the leak

쎲 Never use compressed air or a high pressure pump.

쎲 Do not start engine.

쎲 Do not exceed 4.12 kPa (0.042 kg/cm 2 , 0.6 psi) of sure in EVAP system.

2 Also attach the pressure pump and hose

3 Turn ignition switch “ON”

4 Select the “EVAP SYSTEM CLOSE” of “WORK PORT MODE” with CONSULT-II

SUP-5 Touch “START” A bar graph (Pressure indicating play) will appear on the screen

dis-6 Apply positive pressure to the EVAP system until thepressure indicator reaches the middle of the bargraph

7 Locate the leak using a leak detector Refer to

“Evaporative Emission Line Drawing”, EC-26

OR

-1 Attach the EVAP service port adapter securely to theEVAP service port and pressure pump with pressuregauge to the EVAP service port

2 Apply battery voltage to between the terminals ofboth EVAP canister vent control valve and vacuumcut valve bypass valve to make a closed EVAP sys-tem

3 To locate the leak, deliver positive pressure to theEVAP system until pressure gauge points reach 1.38

to 2.76 kPa (0.014 to 0.028 kg/cm2, 0.2 to 0.4 psi)

4 Locate the leak using a leak detector Refer to

“Evaporative Emission Line Drawing”, EC-26

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 26

Evaporative Emission Line Drawing

AEC781A

Trang 27

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 28

On Board Refueling Vapor Recovery (ORVR)SYSTEM DESCRIPTION

SEF662U

From the beginning of refueling, the fuel tank pressure goes up When the pressure reaches the settingvalue of the refueling control valve (RCV) opening pressure, the RCV is opened After RCV opens, theair and vapor inside the fuel tank go through refueling EVAP vapor cut valve, RCV and refueling vaporline to the EVAP canister The vapor is absorbed by the EVAP canister and the air is released to theatmosphere

When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closedand refueling is stopped because of auto shut-off The vapor which was absorbed by the EVAP canister

is purged during driving

The RCV is always closed during driving and the evaporative emission control system is operated thesame as conventional system

WARNING:

When conducting inspections below, be sure to observe the following:

쎲 Put a “ CAUTION: INFLAMMABLE” sign in workshop.

쎲 Do not smoke while servicing fuel system Keep open flames and sparks away from work area.

쎲 Be sure to furnish the workshop with a CO 2 fire extinguisher.

CAUTION:

쎲 Before removing fuel line parts, carry out the following procedures:

a Put drained fuel in an explosion-proof container and put lid on securely.

b Release fuel pressure from fuel line Refer to “Fuel Pressure Release”, EC-34.

c Disconnect battery ground cable.

쎲 Always replace O-ring when the fuel gauge retainer is removed.

쎲 Do not kink or twist hose and tube when they are installed.

쎲 Do not tighten hose and clamps excessively to avoid damaging hoses.

쎲 After installation, run engine and check for fuel leaks at connection.

쎲 Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

Trang 29

Check EVAP canister for water.

Weigh the EVAP canister with vent control

1 Check hose connections

to the EVAP canister and water separator for clogging and poor connection.

2 Check water separator.

Refer to “COMPONENT INSPECTION”, EC-292.

If NG, repair or replace hose or replace water separator.

CHECK COMPONENT

(Refueling EVAP vapor cut valve).

Check refueling EVAP vapor cut valve for

CHECK COMPONENT

(Refueling control valve).

Check refueling control valve diaphragm

for damage Blow air from port C, check

that there is no air flow from the port C.

Refer to “COMPONENT INSPECTION”,

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

Trang 30

SYMPTOM: Cannot refuel/Fuel odor from the fuel filler

opening is strong while refueling.

INSPECTION START

CHECK COMPONENT

(Water separator and EVAP canister).

1 Check water separator for insect nests

or debris Refer to “COMPONENT INSPECTION”, EC-292.

2 Weigh the EVAP canister with vent

con-trol valve attached.

If the weight is:

If OK, check if water drains from the

can-ister Water should not drain from the

EVAP canister.

OK

䉴

NG Replace water separator or EVAP canister and check hose connector to EVAP canister and water separator for clogging and poor connection If NG, repair or replace hose.

CHECK COMPONENT

(Vent hoses and vent tubes).

Check hoses and tubes between EVAP

canister and refueling control valve for

clogging, kink, loosen and improper

(Filler neck tube).

Check signal line and recirculation line for

clogging, dent and cracks.

OK

䉴

NG Replace filler neck tube.

CHECK COMPONENT

(Refueling control valve).

Refer to “COMPONENT INSPECTION” on

(Refueling EVAP vapor cut valve).

Refer to “COMPONENT INSPECTION” on

next page.

OK

䉴

NG Replace fuel tank with refueling EVAP vapor cut valve.

CHECK COMPONENT

(Fuel filler tube).

1 Check filler neck tube and hose

con-nected to the fuel tank for clogging, dent and cracks.

2 Check one-way fuel valve for clogging.

Refer to “COMPONENT INSPECTION”, EC-32.

OK

䉴

NG Replace fuel filler tube orreplace one-way fuel valve with fuel tank.

Trang 31

COMPONENT INSPECTION

Refueling control valve

Check refueling control valve as follows:

1 Check visually for cracks in the appearance

2 Check air continuity between port A and B

Blow air into the port A Air should flow freely through portB

3 Blow air into port C and check there is no leakage

4 Apply pressure to both port A and C [20 kPa (150 mmHg,5.91 inHg)] and check there is no leakage from port B

If NG, replace refueling control valve

SEF664U

Refueling EVAP vapor cut valve

1 Remove fuel tank Refer to “FUEL SYSTEM” in FE section.Drain fuel from the tank as follows:

With CONSULT-II

a Remove fuel feed hose located on the fuel gaugeretainer, and then connect a spare fuel hose to other side

of the fuel container

b Drain fuel using “FUEL PUMP RELAY” in “ACTIVETEST” mode with CONSULT-II

Without CONSULT-II

a Remove fuel gauge retainer

b Drain fuel from the tank using a hand pump into a fuelcontainer

2 Check valve head appearance visually for cracks

3 Check refueling EVAP vapor cut valve for being stuck toclose as follows

Blow air into the refueling EVAP vapor cut valve, and checkthat the air flows freely into the tank

4 Check EVAP vapor cut valve for being stuck to open as lows

fol-a Connect vacuum pump to cut valve

b Remove fuel gauge retainer with fuel gauge unit

Always replace O-ring with new one.

c Put fuel filler tank upside down

d Apply negative pressure [−13.3 kPa (−100 mmHg, −3.94inHg)] with fuel gauge retainer remaining open and checkthat the pressure is applicable

If NG, replace refueling EVAP vapor cut valve with fuel tank

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

(Cont’d)

Trang 32

One-way fuel valve

1 Drain fuel from the tank

Refer to “COMPONENT INSPECTION” of refueling EVAPvapor cut valve, EC-31

2 Remove fuel filler tube and hose

3 Check one-way fuel valve for operation

When a stick is inserted, the valve should open, whenremoving stick it should close

Do not drop any material into the tank.

If NG, replace one-way fuel valve with fuel tank

(Cont’d)

Trang 33

This system returns blow-by gas to the intake

col-lector

The positive crankcase ventilation (PCV) valve is

provided to conduct crankcase blow-by gas to the

intake manifold

During partial throttle operation of the engine, the

intake manifold sucks the blow-by gas through

the PCV valve

Normally, the capacity of the valve is sufficient to

handle any blow-by and a small amount of

venti-lating air

The ventilating air is then drawn from the air duct

into the crankcase In this process the air passesthrough the hose connecting air inlet tubes torocker cover

Under full-throttle condition, the manifold vacuum

is insufficient to draw the blow-by flow through thevalve The flow goes through the hose connection

in the reverse direction

On vehicles with an excessively high blow-by, thevalve does not meet the requirement This isbecause some of the flow will go through the hoseconnection to the intake collector under all condi-tions

AEC909

SEF244Q

InspectionPCV (Positive Crankcase Ventilation) VALVE

With engine running at idle, remove PCV valve from breatherseparator A properly working valve makes a hissing noise as airpasses through it A strong vacuum should be felt immediatelywhen a finger is placed over the valve inlet

ET277

VENTILATION HOSE

1 Check hoses and hose connections for leaks

2 Disconnect all hoses and clean with compressed air If anyhose cannot be freed of obstructions, replace

GI

MA EM LC

EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 34

Fuel Pressure Release

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

Fuel Pressure Check

쎲 When reconnecting fuel line, always use new clamps.

쎲 Make sure that clamp screw does not contact adjacent parts.

쎲 Use a torque driver to tighten clamps.

쎲 Use Pressure Gauge to check fuel pressure.

쎲 Do not perform fuel pressure check with system ating Fuel pressure gauge may indicate false readings.

oper-1 Release fuel pressure to zero

2 Disconnect fuel hose between fuel filter and fuel tube(engine side)

3 Install pressure gauge between fuel filter and fuel tube

4 Start engine and check for fuel leakage

Trang 35

Approximately 294 kPa (3.0 kg/cm 2 , 43 psi)

If results are unsatisfactory, perform Fuel Pressure tor Check

Regula-SEF718B

Fuel Pressure Regulator Check

1 Stop engine and disconnect fuel pressure regulator vacuumhose from intake manifold

2 Plug intake manifold with a rubber cap

3 Connect variable vacuum source to fuel pressure regulator

4 Start engine and read indication of fuel pressure gauge asvacuum is changed

Fuel pressure should decrease as vacuum increases If results are unsatisfactory, replace fuel pressure regulator.

SEF476U

SEF245QD

Injector Removal and Installation

1 Release fuel pressure to zero

2 Remove injector tube assembly with injectors from intakemanifold

3 Remove injectors from injector tube assembly

쎲 Push injector tail piece

쎲 Do not pull on the connector

4 Install injectors

쎲 Clean exterior of injector tail piece

쎲 Use new O-rings

CAUTION:

After properly connecting injectors to fuel tube assembly, check connections for fuel leakage.

5 Assemble injectors to injector tube assembly

6 Install injector tube assembly to intake manifold

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 36

COMPONENT INSPECTION AND ADJUSTMENT

Perform inspection and adjustment as follows:

1 Make sure the engine has cooled down and remove thethrottle body Refer to “OUTER COMPONENT PARTS” in

EM section

2 Leave the throttle body for more than 3 hours so the perature of the thermowax levels with the ambient air tem-perature

tem-Avoid direct sunlight or other heat source (heater, air conditioner, etc.).

3 Check dimension L1 without removing thermowax fromthrottle body Measure ambient air temperature with a ther-mometer

L1dimension Judgement and remedy Inside hatched area The thermowax is normal Perform FIC adjustment.

Go to step 4.

Outside hatched area Replace the thermowax and install the FIC Perform

adjustment from step 2.

SEF505S

4 Check the clearance A between the stopper and the throttleadjusting screw (TAS) If not within specifications (thehatched area as shown in the figure below), adjust clear-ance using screw S

Do not adjust the clearance using the throttle adjusting screw (TAS).

5 After adjusting clearance A, tighten the lock nut of screw S

6 Install the throttle body Refer to “OUTER COMPONENTPARTS” in EM section

7 Warm up engine to normal operating temperature Confirmthere is clearance between FIC and roller

SEF673U

Trang 37

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

(7) Air intake system

(Oil filler cap, oil level gauge, etc.)

쎲 On models equipped with automatic transaxle, when checking idle speed, ignition timing and mixture ratio, checks should be carried out while shift lever is in

“N” position.

쎲 When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe.

쎲 Turn off headlamps, heater blower, rear defogger.

쎲 Keep front wheels pointed straight ahead.

쎲 Make the check after the cooling fan has stopped.

GI

MA EM LC EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

IDX

Trang 38

Overall inspection sequence

SEF554Y

NOTE:

If a vehicle contains a part which is operating outside of design specifications with no MIL illumination, the part shall not be replaced prior to emission testing unless it is determined that the part has been tampered with or abused in such a way that the diagnostic system cannot rea- sonably be expected to detect the resulting malfunction.

Adjustment (Cont’d)

Trang 39

Visually check the following:

쎲 Air cleaner clogging

쎲 Hoses and ducts for leaks

쎲 EGR valve operation

쎲 Electrical connectors

쎲 Gasket

쎲 Throttle valve and throttle position sensor operations

Start engine and warm it up until engine coolant temperature

indicator points to the middle of gauge and ensure that engine

speed is below 1,000 rpm.

Open engine hood and run engine at about 2,000 rpm for about

2 minutes under no-load.

Perform ECM Self-diagnosis.

Rev engine two or three times under no-load, then run engine for

about 1 minute at idle speed.

1 Select “IGNITION TIMING ADJ” in WORK SUPPORT mode.

Rev engine (2,000 - 3,000 rpm) 2 or 3 times under no-load and

run engine at idle speed.

Check ignition timing with a timing light.

EC

FE CL

MT AT

FA RA BR

ST RS

BT HA EL

Trang 40

Check base idle speed.

Read idle speed in “IGN TIMING ADJ” mode with CONSULT-II.

OR Check idle speed.

Định dạng
Số trang	476
Dung lượng	6,98 MB