ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
TROUBLE DIAGNOSIS - INDEX ....................................9
Alphabetical Index .......................................................9
DTC No. Index...........................................................13
PRECAUTIONS .............................................................18
Supplemental Restraint System (SRS) ″AIR
BAG″ and ″SEAT BELT PRE-TENSIONER″.............18
Precautions for On Board Diagnostic (OBD)
System of Engine and A/T.........................................18
Engine Fuel & Emission Control System..................19
Precautions................................................................20
Wiring Diagrams and Trouble Diagnosis...................21
PREPARATION .............................................................22
Special Service Tools ................................................22
Commercial Service Tools.........................................22
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.........................................................................24
Engine Control Component Parts Location...............24
Circuit Diagram..........................................................28
System Diagram........................................................29
Vacuum Hose Drawing..............................................30
System Chart.............................................................31
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................32
Multiport Fuel Injection (MFI) System .......................32
Electronic Ignition (EI) System..................................34
Air Conditioning Cut Control......................................35
Fuel Cut Control (at no load & high engine
speed)........................................................................36
Evaporative Emission System...................................36
On Board Refueling Vapor Recovery (ORVR)..........42
Positive Crankcase Ventilation..................................51
CAN Communication.................................................52
Automatic Speed Control Device (ASCD) System....53
BASIC SERVICE PROCEDURE...................................56
Fuel Pressure Release..............................................56
Fuel Pressure Check.................................................56
Injector.......................................................................57
How to Check Idle Speed and Ignition Timing..........58
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment.................................................................59
Accelerator Pedal Released Position Learning.........71
Throttle Valve Closed Position Learning...................71
Idle Air Volume Learning ...........................................71
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................75
Introduction................................................................75
Two Trip Detection Logic...........................................75
Emission-related Diagnostic Information...................76
Malfunction Indicator Lamp (MIL)..............................92
OBD System Operation Chart...................................96
CONSULT-II.............................................................101
Generic Scan Tool (GST)........................................117
TROUBLE DIAGNOSIS - INTRODUCTION................119
Introduction..............................................................119
Work Flow................................................................121
TROUBLE DIAGNOSIS - BASIC INSPECTION.........123
Basic Inspection.......................................................123
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION.............................................................128
DTC Inspection Priority Chart..................................128
Fail-safe Chart.........................................................129
Symptom Matrix Chart.............................................131
CONSULT-II Reference Value in Data Monitor
Mode........................................................................135
Major Sensor Reference Graph in Data Monitor
Mode........................................................................138
ECM Terminals and Reference Value .....................141
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..152
Description...............................................................152
Testing Condition.....................................................152
Inspection Procedure...............................................152
Diagnostic Procedure ..............................................153
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................156
Description...............................................................156
Diagnostic Procedure ..............................................156
TROUBLE DIAGNOSIS FOR POWER SUPPLY........157
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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