EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION EC
A
EC
Revision: 2004 November 2004 Murano
ENGINE CONTROL SYSTEM
INDEX FOR DTC ........................................................ 8
Alphabetical Index .................................................... 8
DTC No. Index ....................................................... 12
PRECAUTIONS ........................................................ 16
Precautions for Supplemental Restraint System
(SRS) ?AIR BAG? and ?SEAT BELT PRE-TEN-
SIONER? ................................................................ 16
On Board Diagnostic (OBD) System of Engine and
CVT ........................................................................ 16
Precaution .............................................................. 16
Wiring Diagrams and Trouble Diagnosis ................ 19
PREPARATION ......................................................... 20
Special Service Tools ............................................. 20
Commercial Service Tools ...................................... 21
ENGINE CONTROL SYSTEM .................................. 22
System Diagram ..................................................... 22
Vacuum Hose Drawing ........................................... 23
System Chart ......................................................... 24
Multiport Fuel Injection (MFI) System .................... 25
Electronic Ignition (EI) System ............................... 27
Nissan Torque Demand (NTD) Control System ..... 28
Air Conditioning Cut Control ................................... 29
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 29
CAN Communication .............................................. 30
BASIC SERVICE PROCEDURE .............................. 31
Idle Speed and Ignition Timing Check .................... 31
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................. 32
Accelerator Pedal Released Position Learning ...... 43
Throttle Valve Closed Position Learning ................ 43
Idle Air Volume Learning ........................................ 43
Fuel Pressure Check .............................................. 45
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 47
Introduction ............................................................ 47
Two Trip Detection Logic ........................................ 47
Emission-Related Diagnostic Information .............. 48
NVIS (Nissan Vehicle Immobilizer System ? NATS)
... 62
Malfunction Indicator Lamp (MIL) ...........................62
OBD System Operation Chart ................................65
TROUBLE DIAGNOSIS ............................................71
Trouble Diagnosis Introduction ...............................71
DTC Inspection Priority Chart .................................75
Fail-Safe Chart .......................................................77
Basic Inspection .....................................................78
Symptom Matrix Chart ............................................83
Engine Control Component Parts Location ............87
Circuit Diagram .......................................................93
ECM Harness Connector Terminal Layout .............95
ECM Terminals and Reference Value .....................95
CONSULT-II Function ...........................................105
Generic Scan Tool (GST) Function .......................118
CONSULT-II Reference Value in Data Monitor .....121
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................124
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .126
Description ............................................................126
Testing Condition ..................................................126
Inspection Procedure ............................................126
Diagnostic Procedure ...........................................127
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................130
Description ............................................................130
Diagnostic Procedure ...........................................130
POWER SUPPLY AND GROUND CIRCUIT ...........131
Wiring Diagram .....................................................131
Diagnostic Procedure ...........................................134
Ground Inspection ................................................139
DTC U1000, U1001 CAN COMMUNICATION LINE .140
Description ............................................................140
On Board Diagnosis Logic ....................................140
DTC Confirmation Procedure ...............................140
Wiring Diagram .....................................................141
Diagnostic Procedure ...........................................142
DTC P0011, P0021 IVT CONTROL ........................143
Description ............................................................143
CONSULT-II Reference Value in Data Monitor Mode
.143