ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
TROUBLE DIAGNOSIS - INDEX ....................................8
Alphabetical & P No. Index for DTC ...........................8
PRECAUTIONS .............................................................14
Supplemental Restraint System (SRS) ″AIR
BAG″ and ″SEAT BELT PRE-TENSIONER″.............14
Precautions for On Board Diagnostic (OBD)
System of Engine and A/T.........................................14
Engine Fuel & Emission Control System..................15
Precautions................................................................16
Wiring Diagrams and Trouble Diagnosis...................17
PREPARATION .............................................................18
Special Service Tools ................................................18
Commercial Service Tools.........................................18
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.........................................................................20
Engine Control Component Parts Location...............20
Circuit Diagram..........................................................24
System Diagram........................................................25
Vacuum Hose Drawing..............................................26
System Chart.............................................................27
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................28
Multiport Fuel Injection (MFI) System .......................28
Electronic Ignition (EI) System..................................30
Air Conditioning Cut Control......................................31
Fuel Cut Control (at no load & high engine
speed)........................................................................32
Evaporative Emission System...................................32
On Board Refueling Vapor Recovery (ORVR)..........38
Positive Crankcase Ventilation..................................47
BASIC SERVICE PROCEDURE...................................49
Fuel Pressure Release..............................................49
Fuel Pressure Check.................................................49
Fuel Pressure Regulator Check................................50
Injector.......................................................................51
How to Check Idle Speed and Ignition Timing..........52
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment.................................................................53
Idle Air Volume Learning ...........................................66
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................68
Introduction................................................................68
Two Trip Detection Logic...........................................68
Emission-related Diagnostic Information...................69
Malfunction Indicator Lamp (MIL)..............................82
OBD System Operation Chart...................................83
CONSULT-II...............................................................89
Generic Scan Tool (GST)........................................103
TROUBLE DIAGNOSIS - INTRODUCTION................105
Introduction..............................................................105
Work Flow................................................................107
TROUBLE DIAGNOSIS - BASIC INSPECTION.........109
Basic Inspection.......................................................109
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION.............................................................121
DTC Inspection Priority Chart..................................121
Fail-safe Chart.........................................................122
Symptom Matrix Chart.............................................123
CONSULT-II Reference Value in Data Monitor
Mode........................................................................127
Major Sensor Reference Graph in Data Monitor
Mode........................................................................130
ECM Terminals and Reference Value .....................132
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..140
Description...............................................................140
Testing Condition.....................................................140
Inspection Procedure...............................................140
Diagnostic Procedure ..............................................141
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................144
Description...............................................................144
Diagnostic Procedure ..............................................144
TROUBLE DIAGNOSIS FOR POWER SUPPLY........145
Main Power Supply and Ground Circuit..................145
DTC P0100 MASS AIR FLOW SENSOR (MAFS)......152
Component Description...........................................152
CONSULT-II Reference Value in Data Monitor
Mode........................................................................152
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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