Index Infiniti Infiniti F50 - service repair manual 2006 year
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Infiniti F50. Manual - part 340
EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION
A
EC
INDEX FOR DTC ........................................................ 9
Alphabetical Index .................................................... 9DTC No. Index ....................................................... 12
PRECAUTIONS ........................................................ 17
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TEN-SIONER” ................................................................ 17On Board Diagnostic (OBD) System of Engine and A/T .......................................................................... 17Precaution .............................................................. 17Wiring Diagrams and Trouble Diagnosis ................ 20
PREPARATION ......................................................... 21
Special Service Tools ............................................. 21Commercial Service Tools ...................................... 21
ENGINE CONTROL SYSTEM .................................. 23
System Diagram ..................................................... 23Vacuum Hose Drawing ........................................... 24System Chart ......................................................... 25Multiport Fuel Injection (MFI) System .................... 26Electronic Ignition (EI) System ............................... 28Nissan Torque Demand (NTD) Control System ..... 29Air Conditioning Cut Control ................................... 30Fuel Cut Control (at No Load and High Engine Speed) .................................................................... 30CAN communication .............................................. 30
BASIC SERVICE PROCEDURE .............................. 34
Idle Speed and Ignition Timing Check .................... 34Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment ............................................................. 35Accelerator Pedal Released Position Learning ...... 46Throttle Valve Closed Position Learning ................ 46Idle Air Volume Learning ........................................ 46Fuel Pressure Check .............................................. 48
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 51
Introduction ............................................................ 51Two Trip Detection Logic ........................................ 51Emission-related Diagnostic Information ................ 52IVIS (Infiniti Vehicle Immobilizer System — NATS)
... 65
Malfunction Indicator Lamp (MIL) ........................... 65OBD System Operation Chart ................................ 69
TROUBLE DIAGNOSIS ............................................ 74
Trouble Diagnosis Introduction ............................... 74DTC Inspection Priority Chart ................................. 79Fail-safe Chart ........................................................ 81Basic Inspection ..................................................... 82Symptom Matrix Chart ............................................ 87Engine Control Component Parts Location ............ 91Circuit Diagram ....................................................... 97ECM Harness Connector Terminal Layout ............. 99ECM Terminals and Reference Value ..................... 99CONSULT-II Function ........................................... 108Generic Scan Tool (GST) Function ....................... 121CONSULT-II Reference Value in Data Monitor Mode
. 123
Major Sensor Reference Graph in Data Monitor Mode ..................................................................... 126
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .128
Description ............................................................ 128Testing Condition .................................................. 128Inspection Procedure ............................................ 128Diagnostic Procedure ........................................... 129
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-DENT ....................................................................... 132
Description ............................................................ 132Diagnostic Procedure ........................................... 132
POWER SUPPLY CIRCUIT FOR ECM ................... 133
Wiring Diagram ..................................................... 133Diagnostic Procedure ........................................... 136Component Inspection .......................................... 140
DTC U1000, U1001 CAN COMMUNICATION LINE .141
Description ............................................................ 141On Board Diagnosis Logic .................................... 141DTC Confirmation Procedure ............................... 141Wiring Diagram ..................................................... 142Diagnostic Procedure ........................................... 143
DTC P0011, P0021 IVT CONTROL ........................ 144
Description ............................................................ 144CONSULT-II Reference Value in Data Monitor Mode
. 145
On Board Diagnosis Logic .................................... 145