EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION EC
A
EC
ENGINE CONTROL SYSTEM
QR (WITH EURO-OBD)
INDEX FOR DTC ...................................................... 21
Alphabetical Index .................................................. 21
DTC No. Index ....................................................... 24
PRECAUTIONS ........................................................ 27
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 27
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 27
Precaution .............................................................. 27
PREPARATION ......................................................... 31
Special Service Tools ............................................. 31
Commercial Service Tools ...................................... 32
ENGINE CONTROL SYSTEM .................................. 33
System Diagram ..................................................... 33
Vacuum Hose Drawing ........................................... 35
System Chart ......................................................... 37
Multiport Fuel Injection (MFI) System .................... 38
Electronic Ignition (EI) System ............................... 40
Air Conditioning Cut Control ................................... 41
Fuel Cut Control (At No Load and High Engine
Speed) .................................................................... 41
CAN Communication Unit ...................................... 42
BASIC SERVICE PROCEDURE .............................. 48
Idle Speed and Ignition Timing Check .................... 48
Accelerator Pedal Released Position Learning ...... 49
Throttle Valve Closed Position Learning ................ 50
Idle Air Volume Learning ........................................ 50
Fuel Pressure Check .............................................. 52
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 55
Introduction ............................................................ 55
Two Trip Detection Logic ........................................ 55
Emission-Related Diagnostic Information .............. 56
NATS (Nissan Anti-Theft System) .......................... 67
Malfunction Indicator (MI) ....................................... 67
OBD System Operation Chart ................................ 71
TROUBLE DIAGNOSIS ............................................ 76
Trouble Diagnosis Introduction ............................... 76
DTC Inspection Priority Chart ................................ 80
Fail-Safe Chart .......................................................81
Basic Inspection .....................................................82
Symptom Matrix Chart ............................................87
Engine Control Component Parts Location ............91
Circuit Diagram .......................................................96
ECM Harness Connector Terminal Layout .............98
ECM Terminals and Reference Value .....................98
CONSULT-II Function (ENGINE) ..........................106
Generic Scan Tool (GST) Function .......................116
CONSULT-II Reference Value in Data Monitor Mode
.118
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................121
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .123
Description ............................................................123
Testing Condition ..................................................123
Inspection Procedure ............................................123
Diagnostic Procedure ...........................................124
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................127
Description ............................................................127
Diagnostic Procedure ...........................................127
POWER SUPPLY AND GROUND CIRCUIT ...........128
Wiring Diagram .....................................................128
Diagnostic Procedure ...........................................129
Component Inspection ..........................................135
Ground Inspection ................................................135
DTC U1000, U1001 CAN COMMUNICATION LINE .136
Description ............................................................136
On Board Diagnosis Logic ....................................136
DTC Confirmation Procedure ...............................136
Wiring Diagram .....................................................137
Diagnostic Procedure ...........................................138
DTC P0011 IVT CONTROL .....................................139
Description ............................................................139
CONSULT-II Reference Value in Data Monitor Mode
.139
On Board Diagnosis Logic ....................................140
DTC Confirmation Procedure ...............................140
Diagnostic Procedure ...........................................141
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