Infiniti Q45. Manual — part 340

CLOCK

DI-227

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A

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DI

Removal and Installation

NKS001F0

REMOVAL

1.

Remove the cluster lid C, refer to

IP-10, "INSTRUMENT PANEL

ASSEMBLY"

.

2.

Remove the screws, and remove clock.

BULB REPLACEMENT

1.

Turn the back of the bulbs (1) counterclockwise about 1/4 turn to
unlock them.

2.

Pull the old bulbs from the clock (2).

3.

Install the new bulbs and turn them clockwise about 1/4 turn to
lock them in place.

INSTALLATION

Installation is the reverse order of removal.

PKIA0309E

Clock bulbs

: 12V-1.12W (BLUE CAP)

×

2

PKIC8029E

DI-228

CLOCK

EC-1

ENGINE CONTROL SYSTEM

B ENGINE

CONTENTS

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SECTION

EC

A

EC

ENGINE CONTROL SYSTEM

INDEX FOR DTC . . . . . . . . . . . . . . 9

DTC No. Index . . . . . . . . . . . . . . . 9
Alphabetical Index . . . . . . . . . . . . .. 13

PRECAUTIONS . . . . . . . . . . . . . . 17

Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” . . . . . . . . . . . . . . . . 17
On Board Diagnostic (OBD) System of Engine and
A/T . . . . . . . . . . . . . . . . . . .. 17
Precaution . . . . . . . . . . . . . . . .. 17

PREPARATION . . . . . . . . . . . . . . . 21

Special Service Tools . . . . . . . . . . . . 21
Commercial Service Tools . . . . . . . . . .. 22

ENGINE CONTROL SYSTEM . . . . . . . . .. 23

System Diagram . . . . . . . . . . . . . . 23
Multiport Fuel Injection (MFI) System . . . . . 24
Electronic Ignition (EI) System . . . . . . . ... 26
Fuel Cut Control (at No Load and High Engine
Speed) . . . . . . . . . . . . . . . . . 27

AIR CONDITIONING CUT CONTROL . . . . . . 28

Input/Output Signal Chart . . . . . . . . . ... 28
System Description . . . . . . . . . . . . 28

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

... 29

System Description . . . . . . . . . . . . 29
Component Description . . . . . . . . . . .. 30

CAN COMMUNICATION . . . . . . . . . . .. 31

System Description . . . . . . . . . . . . 31

EVAPORATIVE EMISSION SYSTEM . . . . . ... 32

Description . . . . . . . . . . . . . . . . 32
Component Inspection . . . . . . . . . . ... 35
How to Detect Fuel Vapor Leakage . . . . . ... 36

ON BOARD REFUELING VAPOR RECOVERY
(ORVR) . . . . . . . . . . . . . . . . . .. 38

System Description . . . . . . . . . . . . 38
Diagnostic Procedure . . . . . . . . . . . . 39
Component Inspection . . . . . . . . . . ... 41

POSITIVE CRANKCASE VENTILATION . . . . . 44

Description . . . . . . . . . . . . . . . . 44
Component Inspection . . . . . . . . . . ... 44

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-

NATS) . . . . . . . . . . . . . . . . . . 46

Description . . . . . . . . . . . . . . . .. 46

ON BOARD DIAGNOSTIC (OBD) SYSTEM . . . 47

Introduction . . . . . . . . . . . . . . . . 47
Two Trip Detection Logic . . . . . . . . . . 47
Emission-related Diagnostic Information . . . . 48
Malfunction Indicator Lamp (MIL) . . . . . . ... 63
OBD System Operation Chart . . . . . . . . 66

BASIC SERVICE PROCEDURE . . . . . . . ... 71

Basic Inspection . . . . . . . . . . . . . . 71
Idle Speed and Ignition Timing Check . . . . . 76
VIN Registration . . . . . . . . . . . . . . 77
Accelerator Pedal Released Position Learning . .. 77
Throttle Valve Closed Position Learning . . . . . 78
Idle Air Volume Learning . . . . . . . . . . 78
Fuel Pressure Check . . . . . . . . . . . .. 80

TROUBLE DIAGNOSIS . . . . . . . . . . . 82

Trouble Diagnosis Introduction . . . . . . . ... 82
DTC Inspection Priority Chart . . . . . . . . . 88
Fail-Safe Chart . . . . . . . . . . . . . ... 90
Symptom Matrix Chart . . . . . . . . . . . 91
Engine Control Component Parts Location . . . 95
Vacuum Hose Drawing . . . . . . . . . . . 102
Circuit Diagram . . . . . . . . . . . . . . 103
ECM Harness Connector Terminal Layout . . ... 105
ECM Terminals and Reference Value . . . . ... 105
CONSULT-II Function (ENGINE) . . . . . . .. 115
Generic Scan Tool (GST) Function . . . . . ... 127
CONSULT-II Reference Value in Data Monitor Mode

. 129

Major Sensor Reference Graph in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 133

TROUBLE DIAGNOSIS - SPECIFICATION VALUE .135

Description . . . . . . . . . . . . . . . 135
Testing Condition . . . . . . . . . . . . .. 135
Inspection Procedure . . . . . . . . . . . 135
Diagnostic Procedure . . . . . . . . . . ... 136

TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT . . . . . . . . . . . . . . . . . ... 145

EC-2

Description . . . . . . . . . . . . . . . 145
Diagnostic Procedure . . . . . . . . . . ... 145

POWER SUPPLY AND GROUND CIRCUIT . . ... 146

Wiring Diagram . . . . . . . . . . . . . . 146
Diagnostic Procedure . . . . . . . . . . ... 149
Ground Inspection . . . . . . . . . . . . 154
Component Inspection . . . . . . . . . . .. 155

DTC U1000, U1001 CAN COMMUNICATION LINE .156

Description . . . . . . . . . . . . . . . 156
On Board Diagnosis Logic . . . . . . . . . 156
DTC Confirmation Procedure . . . . . . . ... 156
Wiring Diagram . . . . . . . . . . . . . . 157
Diagnostic Procedure . . . . . . . . . . ... 158

DTC U1010 CAN COMMUNICATION . . . . . . 159

Description . . . . . . . . . . . . . . . 159
On Board Diagnosis Logic . . . . . . . . . 159
DTC Confirmation Procedure . . . . . . . ... 159
Diagnostic Procedure . . . . . . . . . . ... 160

DTC P0011, P0021 IVT CONTROL . . . . . . 161

Description . . . . . . . . . . . . . . . 161
CONSULT-II Reference Value in Data Monitor Mode

. 162

On Board Diagnosis Logic . . . . . . . . . 162
DTC Confirmation Procedure . . . . . . . ... 163
Wiring Diagram . . . . . . . . . . . . . . 164
Diagnostic Procedure . . . . . . . . . . ... 167
Component Inspection . . . . . . . . . . .. 171
Removal and Installation . . . . . . . . . .. 172

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER . . . . . . . . . . . . . . . . .. 173

Description . . . . . . . . . . . . . . . 173
CONSULT-II Reference Value in Data Monitor Mode

. 173

On Board Diagnosis Logic . . . . . . . . . 173
DTC Confirmation Procedure . . . . . . . ... 173
Wiring Diagram . . . . . . . . . . . . . . 174
Diagnostic Procedure . . . . . . . . . . ... 177
Component Inspection . . . . . . . . . . .. 179
Removal and Installation . . . . . . . . . .. 179

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .180

Description . . . . . . . . . . . . . . . 180
CONSULT-II Reference Value in Data Monitor Mode

. 180

On Board Diagnosis Logic . . . . . . . . . 180
DTC Confirmation Procedure . . . . . . . ... 181
Wiring Diagram . . . . . . . . . . . . . . 182
Diagnostic Procedure . . . . . . . . . . ... 185
Component Inspection . . . . . . . . . . .. 187
Removal and Installation . . . . . . . . . .. 187

DTC P0075, P0081 IVT CONTROL SOLENOID
VALVE . . . . . . . . . . . . . . . . . . 188

Component Description . . . . . . . . . . 188
CONSULT-II Reference Value in Data Monitor Mode

. 188

On Board Diagnosis Logic . . . . . . . . . 188
DTC Confirmation Procedure . . . . . . . ... 188
Wiring Diagram . . . . . . . . . . . . . . 189
Diagnostic Procedure . . . . . . . . . . ... 193

Component Inspection . . . . . . . . . . ..194
Removal and Installation . . . . . . . . . ...194

DTC P0101 MAF SENSOR . . . . . . . . . .195

Component Description . . . . . . . . . . 195
CONSULT-II Reference Value in Data Monitor Mode

.195

On Board Diagnosis Logic . . . . . . . . . 195
DTC Confirmation Procedure . . . . . . . . 196
Overall Function Check . . . . . . . . . . .197
Wiring Diagram . . . . . . . . . . . . . .198
Diagnostic Procedure . . . . . . . . . . . 199
Component Inspection . . . . . . . . . . ..201
Removal and Installation . . . . . . . . . ...203

DTC P0102, P0103 MAF SENSOR . . . . . . .204

Component Description . . . . . . . . . . 204
CONSULT-II Reference Value in Data Monitor Mode

.204

On Board Diagnosis Logic . . . . . . . . . 204
DTC Confirmation Procedure . . . . . . . . 205
Wiring Diagram . . . . . . . . . . . . . .206
Diagnostic Procedure . . . . . . . . . . . 207
Component Inspection . . . . . . . . . . ..209
Removal and Installation . . . . . . . . . ...210

DTC P0112, P0113 IAT SENSOR . . . . . . . 211

Component Description . . . . . . . . . . 211
On Board Diagnosis Logic . . . . . . . . . 211
DTC Confirmation Procedure . . . . . . . . 211
Wiring Diagram . . . . . . . . . . . . . .212
Diagnostic Procedure . . . . . . . . . . . 213
Component Inspection . . . . . . . . . . ..214
Removal and Installation . . . . . . . . . ...214

DTC P0117, P0118 ECT SENSOR . . . . . . ..215

Component Description . . . . . . . . . . 215
On Board Diagnosis Logic . . . . . . . . . 215
DTC Confirmation Procedure . . . . . . . . 216
Wiring Diagram . . . . . . . . . . . . . .217
Diagnostic Procedure . . . . . . . . . . . 218
Component Inspection . . . . . . . . . . ..219
Removal and Installation . . . . . . . . . ...220

DTC P0122, P0123 TP SENSOR . . . . . . . 221

Component Description . . . . . . . . . . 221
CONSULT-II Reference Value in Data Monitor Mode

.221

On Board Diagnosis Logic . . . . . . . . . 221
DTC Confirmation Procedure . . . . . . . . 222
Wiring Diagram . . . . . . . . . . . . . .223
Diagnostic Procedure . . . . . . . . . . . 224
Component Inspection . . . . . . . . . . ..227
Removal and Installation . . . . . . . . . ...227

DTC P0125 ECT SENSOR . . . . . . . . . ..228

Component Description . . . . . . . . . . 228
On Board Diagnosis Logic . . . . . . . . . 228
DTC Confirmation Procedure . . . . . . . . 229
Diagnostic Procedure . . . . . . . . . . . 229
Component Inspection . . . . . . . . . . ..230
Removal and Installation . . . . . . . . . ...230

DTC P0127 IAT SENSOR . . . . . . . . . . 231

Component Description . . . . . . . . . . 231
On Board Diagnosis Logic . . . . . . . . . 231