engine control INFINITI FX35 2007 Service Manual

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
C
D E
F
G H
I
J
K L
M
SECTION
A
EC
Revision: 2006 July 2007 FX35/FX45
ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
DTC No. Index .................................................... ... 15
Alphabetical Index ............................................... ... 19
PRECAUTIONS ..................................................... ... 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ... 23
Precautions for Procedures without Cowl Top Cover ... 23
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... ... 23
Precaution ........................................................... ... 24
PREPARATION ...................................................... ... 27
Special Service Tools .......................................... ... 27
Commercial Service Tools ................................... ... 28
ENGINE CONTROL SYSTEM ............................... ... 29
System Diagram .................................................. ... 29
Multiport Fuel Injection (MFI) System ................. ... 30
Electronic Ignition (EI) System ............................ ... 32
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. ... 33
AIR CONDITIONING CUT CONTROL .................. ... 34
Input/Output Signal Chart .................................... ... 34
System Description ............................................. ... 34
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ... 35
System Description ............................................. ... 35
Component Description ....................................... ... 36
CAN COMMUNICATION ....................................... ... 37
System Description ............................................. ... 37
EVAPORATIVE EMISSION SYSTEM .................... ... 38
Description .......................................................... ... 38
Component Inspection ........................................ ... 41
Removal and Installation ..................................... ... 42
How to Detect Fuel Vapor Leakage .................... ... 42
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... ... 45
System Description ............................................. ... 45
Diagnostic Procedure .......................................... ... 46
Component Inspection ........................................ ... 48 POSITIVE CRANKCASE VENTILATION ..............
... 50
Description ........................................................... ... 50
Component Inspection ......................................... ... 50
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... ... 52
Description ........................................................... ... 52
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 53
Introduction .......................................................... ... 53
Two Trip Detection Logic ..................................... ... 53
Emission-Related Diagnostic Information ............ ... 54
Malfunction Indicator Lamp (MIL) ........................ ... 67
OBD System Operation Chart ............................. ... 71
BASIC SERVICE PROCEDURE ............................ ... 76
Basic Inspection .................................................. ... 76
Idle Speed and Ignition Timing Check ................. ... 81
Procedure After Replacing ECM ......................... ... 82
VIN Registration .................................................. ... 82
Accelerator Pedal Released Position Learning ... ... 83
Throttle Valve Closed Position Learning .............. ... 83
Idle Air Volume Learning ..................................... ... 83
Fuel Pressure Check ........................................... ... 85
TROUBLE DIAGNOSIS ......................................... ... 87
Trouble Diagnosis Introduction ............................ ... 87
DTC Inspection Priority Chart .............................. ... 93
Fail-Safe Chart .................................................... ... 95
Symptom Matrix Chart ......................................... ... 96
Engine Control Component Parts Location ......... .100
Vacuum Hose Drawing ........................................ .106
Circuit Diagram .................................................... .107
ECM Harness Connector Terminal Layout .......... .109
ECM Terminals and Reference Value .................. .109
CONSULT-II Function (ENGINE) ......................... .118
Generic Scan Tool (GST) Function ...................... .129
CONSULT-II Reference Value in Data Monitor .... .132
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .134
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .137
Description ........................................................... .137
Testing Condition ................................................. .137

EC-5
C
D E
F
G H
I
J
K L
M
EC A
Revision: 2006 July 2007 FX35/FX45
DTC Confirmation Procedure ..............................
. 434
Wiring Diagram ................................................... . 435
Diagnostic Procedure .......................................... . 436
Component Inspection ........................................ . 440
DTC P0455 EVAP CONTROL SYSTEM ............... . 441
On Board Diagnosis Logic .................................. . 441
DTC Confirmation Procedure .............................. . 442
Diagnostic Procedure .......................................... . 443
DTC P0456 EVAP CONTROL SYSTEM ............... . 449
On Board Diagnosis Logic .................................. . 449
DTC Confirmation Procedure .............................. . 450
Overall Function Check ....................................... . 451
Diagnostic Procedure .......................................... . 452
DTC P0460 FUEL LEVEL SENSOR ..................... . 459
Component Description ....................................... . 459
On Board Diagnosis Logic .................................. . 459
DTC Confirmation Procedure .............................. . 459
Diagnostic Procedure .......................................... . 460
Removal and Installation ..................................... . 460
DTC P0461 FUEL LEVEL SENSOR ..................... . 461
Component Description ....................................... . 461
On Board Diagnosis Logic .................................. . 461
Overall Function Check ....................................... . 461
Diagnostic Procedure .......................................... . 462
Removal and Installation ..................................... . 462
DTC P0462, P0463 FUEL LEVEL SENSOR ......... . 463
Component Description ....................................... . 463
On Board Diagnosis Logic .................................. . 463
DTC Confirmation Procedure .............................. . 463
Diagnostic Procedure .......................................... . 464
Removal and Installation ..................................... . 464
DTC P0500 VSS .................................................... . 465
Description .......................................................... . 465
On Board Diagnosis Logic .................................. . 465
DTC Confirmation Procedure .............................. . 465
Overall Function Check ....................................... . 466
Diagnostic Procedure .......................................... . 466
DTC P0506 ISC SYSTEM ...................................... . 467
Description .......................................................... . 467
On Board Diagnosis Logic .................................. . 467
DTC Confirmation Procedure .............................. . 467
Diagnostic Procedure .......................................... . 468
DTC P0507 ISC SYSTEM ...................................... . 469
Description .......................................................... . 469
On Board Diagnosis Logic .................................. . 469
DTC Confirmation Procedure .............................. . 469
Diagnostic Procedure .......................................... . 470
DTC P0550 PSP SENSOR .................................... . 471
Component Description ....................................... . 471
CONSULT-II Reference Value in Data Monitor Mode . 471
On Board Diagnosis Logic .................................. . 471
DTC Confirmation Procedure .............................. . 471
Wiring Diagram ................................................... . 472
Diagnostic Procedure .......................................... . 473
Component Inspection ........................................ . 475
Removal and Installation ..................................... . 475
DTC P0603 ECM POWER SUPPLY ...................... . 476
Component Description ....................................... . 476 On Board Diagnosis Logic ...................................
.476
DTC Confirmation Procedure .............................. .476
Wiring Diagram .................................................... .477
Diagnostic Procedure .......................................... .478
DTC P0605 ECM .................................................... .480
Component Description ....................................... .480
On Board Diagnosis Logic ................................... .480
DTC Confirmation Procedure .............................. .480
Diagnostic Procedure .......................................... .481
DTC P0643 SENSOR POWER SUPPLY ............... .483
On Board Diagnosis Logic ................................... .483
DTC Confirmation Procedure .............................. .483
Wiring Diagram .................................................... .484
Diagnostic Procedure .......................................... .486
DTC P0850 PNP SWITCH ..................................... .488
Component Description ....................................... .488
CONSULT-II Reference Value in Data Monitor Mode .488
On Board Diagnosis Logic ................................... .488
DTC Confirmation Procedure .............................. .488
Overall Function Check ....................................... .489
Wiring Diagram .................................................... .490
Diagnostic Procedure .......................................... .491
DTC P1148, P1168 CLOSED LOOP CONTROL ... .493
On Board Diagnosis Logic ................................... .493
DTC P1211 TCS CONTROL UNIT ......................... .494
Description ........................................................... .494
On Board Diagnosis Logic ................................... .494
DTC Confirmation Procedure .............................. .494
Diagnostic Procedure .......................................... .494
DTC P1212 TCS COMMUNICATION LINE ........... .495
Description ........................................................... .495
On Board Diagnosis Logic ................................... .495
DTC Confirmation Procedure .............................. .495
Diagnostic Procedure .......................................... .495
DTC P1217 ENGINE OVER TEMPERATURE ....... .496
Description ........................................................... .496
CONSULT-II Reference Value in Data Monitor Mode .497
On Board Diagnosis Logic ................................... .497
Overall Function Check ....................................... .498
Wiring Diagram .................................................... .500
Diagnostic Procedure .......................................... .502
Main 12 Causes of Overheating .......................... .507
Component Inspection ......................................... .507
DTC P1225 TP SENSOR ....................................... .509
Component Description ....................................... .509
On Board Diagnosis Logic ................................... .509
DTC Confirmation Procedure .............................. .509
Diagnostic Procedure .......................................... .510
Removal and Installation ..................................... .510
DTC P1226 TP SENSOR ....................................... .511
Component Description ....................................... .511
On Board Diagnosis Logic ................................... .511
DTC Confirmation Procedure .............................. .511
Diagnostic Procedure .......................................... .512
Removal and Installation ..................................... .512
DTC P1421 COLD START CONTROL .................. .513
Description ........................................................... .513

EC-7
C
D E
F
G H
I
J
K L
M
EC A
Revision: 2006 July 2007 FX35/FX45
Wiring Diagram ...................................................
. 585
Diagnostic Procedure .......................................... . 586
Component Inspection ........................................ . 589
Removal and Installation ..................................... . 589
DTC P2135 TP SENSOR ....................................... . 590
Component Description ....................................... . 590
CONSULT-II Reference Value in Data Monitor Mode . 590
On Board Diagnosis Logic .................................. . 590
DTC Confirmation Procedure .............................. . 591
Wiring Diagram ................................................... . 592
Diagnostic Procedure .......................................... . 593
Component Inspection ........................................ . 596
Removal and Installation ..................................... . 596
DTC P2138 APP SENSOR .................................... . 597
Component Description ....................................... . 597
CONSULT-II Reference Value in Data Monitor Mode . 597
On Board Diagnosis Logic .................................. . 597
DTC Confirmation Procedure .............................. . 598
Wiring Diagram ................................................... . 599
Diagnostic Procedure .......................................... . 600
Component Inspection ........................................ . 604
Removal and Installation ..................................... . 604
DTC P2A00, P2A03 A/F SENSOR 1 ..................... . 605
Component Description ....................................... . 605
CONSULT-II Reference Value in Data Monitor Mode . 605
On Board Diagnosis Logic .................................. . 605
DTC Confirmation Procedure .............................. . 606
Wiring Diagram ................................................... . 607
Diagnostic Procedure .......................................... . 610
Removal and Installation ..................................... . 616
ASCD BRAKE SWITCH ........................................ . 617
Component Description ....................................... . 617
CONSULT-II Reference Value in Data Monitor Mode . 617
Wiring Diagram ................................................... . 618
Diagnostic Procedure .......................................... . 619
Component Inspection ........................................ . 623
ASCD INDICATOR ................................................ . 624
Component Description ....................................... . 624
CONSULT-II Reference Value in Data Monitor Mode . 624
Wiring Diagram ................................................... . 625
Diagnostic Procedure .......................................... . 626
ELECTRICAL LOAD SIGNAL ............................... . 627
Description .......................................................... . 627
CONSULT-II Reference Value in Data Monitor Mode . 627
Diagnostic Procedure .......................................... . 627
FUEL INJECTOR ................................................... . 629
Component Description ....................................... . 629
CONSULT-II Reference Value in Data Monitor Mode . 629
Wiring Diagram ................................................... . 630
Diagnostic Procedure .......................................... . 631
Component Inspection ........................................ . 635
Removal and Installation ..................................... . 635 FUEL PUMP ...........................................................
.636
Description ........................................................... .636
CONSULT-II Reference Value in Data Monitor Mode .636
Wiring Diagram .................................................... .637
Diagnostic Procedure .......................................... .638
Component Inspection ......................................... .641
Removal and Installation ..................................... .641
ICC BRAKE SWITCH ............................................ .642
Component Description ....................................... .642
CONSULT-II Reference Value in Data Monitor Mode .642
Wiring Diagram .................................................... .643
Diagnostic Procedure .......................................... .644
Component Inspection ......................................... .649
IGNITION SIGNAL ................................................. .650
Component Description ....................................... .650
Wiring Diagram .................................................... .651
Diagnostic Procedure .......................................... .656
Component Inspection ......................................... .661
Removal and Installation ..................................... .662
REFRIGERANT PRESSURE SENSOR ................. .663
Component Description ....................................... .663
Wiring Diagram .................................................... .664
Diagnostic Procedure .......................................... .665
Removal and Installation ..................................... .667
SNOW MODE SWITCH ......................................... .668
Description ........................................................... .668
CONSULT-II Reference Value in the Data Monitor
Mode .................................................................... .668
Wiring Diagram .................................................... .669
Diagnostic Procedure .......................................... .670
Component Inspection ......................................... .672
MIL AND DATA LINK CONNECTOR ..................... .673
Wiring Diagram .................................................... .673
SERVICE DATA AND SPECIFICATIONS (SDS) ... .675
Fuel Pressure ...................................................... .675
Idle Speed and Ignition Timing ............................ .675
Calculated Load Value ......................................... .675
Mass Air Flow Sensor .......................................... .675
Intake Air Temperature Sensor ............................ .675
Engine Coolant Temperature Sensor .................. .675
Air Fuel Ratio (A/F) Sensor 1 Heater ................... .675
Heated Oxygen sensor 2 Heater ......................... .675
Crankshaft Position Sensor (POS) ...................... .675
Camshaft Position Sensor (PHASE) ................... .675
Throttle Control Motor .......................................... .675
Fuel Injector ......................................................... .676
Fuel Pump ........................................................... .676
VK45DE
INDEX FOR DTC .................................................... .677
DTC No. Index ..................................................... .677
Alphabetical Index ............................................... .681
PRECAUTIONS ..................................................... .685
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .............................................................. .685

EC-8Revision: 2006 July 2007 FX35/FX45
Precautions for Procedures without Cowl Top Cover
.685
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... .685
Precaution ........................................................... .686
PREPARATION ...................................................... .689
Special Service Tools .......................................... .689
Commercial Service Tools ................................... .690
ENGINE CONTROL SYSTEM ............................... .691
System Diagram .................................................. .691
Multiport Fuel Injection (MFI) System .................. .692
Electronic Ignition (EI) System ............................ .694
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. .695
AIR CONDITIONING CUT CONTROL ................... .696
Input/Output Signal Chart .................................... .696
System Description .............................................. .696
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .697
System Description .............................................. .697
Component Description ....................................... .698
CAN COMMUNICATION ........................................ .699
System Description .............................................. .699
EVAPORATIVE EMISSION SYSTEM .................... .700
Description ........................................................... .700
Component Inspection ......................................... .703
Removal and Installation ..................................... .704
How to Detect Fuel Vapor Leakage ..................... .704
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... .707
System Description .............................................. .707
Diagnostic Procedure .......................................... .708
Component Inspection ......................................... .710
POSITIVE CRANKCASE VENTILATION .............. .712
Description ........................................................... .712
Component Inspection ......................................... .712
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... .714
Description ........................................................... .714
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... .715
Introduction .......................................................... .715
Two Trip Detection Logic ..................................... .715
Emission-related Diagnostic Information ............. .716
Malfunction Indicator Lamp (MIL) ........................ .730
OBD System Operation Chart ............................. .732
BASIC SERVICE PROCEDURE ............................ .738
Basic Inspection .................................................. .738
Idle Speed and Ignition Timing Check ................. .743
Procedure After Replacing ECM ......................... .744
VIN Registration .................................................. .744
Accelerator Pedal Released Position Learning ... .745
Throttle Valve Closed Position Learning .............. .745
Idle Air Volume Learning ..................................... .745
Fuel Pressure Check ........................................... .747
TROUBLE DIAGNOSIS ......................................... .749
Trouble Diagnosis Introduction ............................ .749
DTC Inspection Priority Chart .............................. .755
Fail-Safe Chart .................................................... .757
Symptom Matrix Chart ......................................... .758
Engine Control Component Parts Location ......... .762
Vacuum Hose Drawing ........................................ .769 Circuit Diagram ....................................................
.770
ECM Harness Connector Terminal Layout ........... .772
ECM Terminals and Reference Value .................. .772
CONSULT-II Function (ENGINE) ......................... .781
Generic Scan Tool (GST) Function ...................... .793
CONSULT-II Reference Value in Data Monitor .... .796
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .800
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .802
Description ........................................................... .802
Testing Condition ................................................. .802
Inspection Procedure ........................................... .802
Diagnostic Procedure ........................................... .803
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ...................................................................... .812
Description ........................................................... .812
Diagnostic Procedure ........................................... .812
POWER SUPPLY AND GROUND CIRCUIT .......... .813
Wiring Diagram .................................................... .813
Diagnostic Procedure ........................................... .814
Ground Inspection ................................................ .819
DTC U1000, U1001 CAN COMMUNICATION LINE .820
Description ........................................................... .820
On Board Diagnosis Logic ................................... .820
DTC Confirmation Procedure ............................... .820
Wiring Diagram .................................................... .821
Diagnostic Procedure ........................................... .822
DTC U1010 CAN COMMUNICATION .................... .823
Description ........................................................... .823
On Board Diagnosis Logic ................................... .823
DTC Confirmation Procedure ............................... .823
Diagnostic Procedure ........................................... .824
DTC P0011, P0021 IVT CONTROL ........................ .825
Description ........................................................... .825
CONSULT-II Reference Value in Data Monitor Mode .826
On Board Diagnosis Logic ................................... .826
DTC Confirmation Procedure ............................... .827
Wiring Diagram .................................................... .828
Diagnostic Procedure ........................................... .831
Component Inspection ......................................... .835
Removal and Installation ...................................... .836
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER .................................................................. .837
Description ........................................................... .837
CONSULT-II Reference Value in Data Monitor Mode .837
On Board Diagnosis Logic ................................... .837
DTC Confirmation Procedure ............................... .837
Wiring Diagram .................................................... .838
Diagnostic Procedure ........................................... .841
Component Inspection ......................................... .843
Removal and Installation ...................................... .843
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .844
Description ........................................................... .844
CONSULT-II Reference Value in Data Monitor Mode .844
On Board Diagnosis Logic ................................... .844
DTC Confirmation Procedure ............................... .845

EC-12Revision: 2006 July 2007 FX35/FX45
On Board Diagnosis Logic ...................................
11 3 7
DTC Confirmation Procedure .............................. 11 3 7
Diagnostic Procedure .......................................... 11 3 8
DTC P0550 PSP SENSOR ..................................... 113 9
Component Description ....................................... 11 3 9
CONSULT-II Reference Value in Data Monitor Mode 11 3 9
On Board Diagnosis Logic ................................... 11 3 9
DTC Confirmation Procedure .............................. 11 3 9
Wiring Diagram .................................................... 11 4 0
Diagnostic Procedure .......................................... 11 4 1
Component Inspection ......................................... 11 4 3
Removal and Installation ..................................... 11 4 3
DTC P0603 ECM POWER SUPPLY ...................... 114 4
Component Description ....................................... 11 4 4
On Board Diagnosis Logic ................................... 11 4 4
DTC Confirmation Procedure .............................. 11 4 4
Wiring Diagram .................................................... 11 4 5
Diagnostic Procedure .......................................... 11 4 6
DTC P0605 ECM .................................................... 114 8
Component Description ....................................... 11 4 8
On Board Diagnosis Logic ................................... 11 4 8
DTC Confirmation Procedure .............................. 11 4 8
Diagnostic Procedure .......................................... 11 4 9
DTC P0643 SENSOR POWER SUPPLY ............... 115 1
On Board Diagnosis Logic ................................... 11 5 1
DTC Confirmation Procedure .............................. 11 5 1
Wiring Diagram .................................................... 11 5 2
Diagnostic Procedure .......................................... 11 5 4
DTC P0850 PNP SWITCH ..................................... 115 6
Component Description ....................................... 11 5 6
CONSULT-II Reference Value in Data Monitor Mode
11 5 6
On Board Diagnosis Logic ................................... 11 5 6
DTC Confirmation Procedure .............................. 11 5 6
Overall Function Check ....................................... 11 5 7
Wiring Diagram .................................................... 11 5 8
Diagnostic Procedure .......................................... 11 5 9
DTC P1140, P1145 IVT CONTROL POSITION SEN-
SOR ........................................................................ 116 1
Component Description ....................................... 11 6 1
CONSULT-II Reference Value in Data Monitor Mode 11 6 1
On Board Diagnosis Logic ................................... 11 6 1
DTC Confirmation Procedure .............................. 11 6 1
Wiring Diagram .................................................... 11 6 3
Diagnostic Procedure .......................................... 11 6 6
Component Inspection ......................................... 11 6 9
Removal and Installation ..................................... 11 6 9
DTC P1148, P1168 CLOSED LOOP CONTROL ... 117 0
On Board Diagnosis Logic ................................... 11 7 0
DTC P1211 TCS CONTROL UNIT ......................... 117 1
Description ........................................................... 11 7 1
On Board Diagnosis Logic ................................... 11 7 1
DTC Confirmation Procedure .............................. 11 7 1
Diagnostic Procedure .......................................... 11 7 1
DTC P1212 TCS COMMUNICATION LINE ........... 117 2
Description ........................................................... 11 7 2
On Board Diagnosis Logic ................................... 11 7 2 DTC Confirmation Procedure ...............................
11 7 2
Diagnostic Procedure ........................................... 11 7 2
DTC P1217 ENGINE OVER TEMPERATURE ....... 11 73
Description ........................................................... 11 7 3
CONSULT-II Reference Value in Data Monitor Mode 11 7 4
On Board Diagnosis Logic ................................... 11 7 4
Overall Function Check ........................................ 11 7 5
Wiring Diagram .................................................... 11 7 7
Diagnostic Procedure ........................................... 11 7 9
Main 13 Causes of Overheating .......................... 11 8 3
Component Inspection ......................................... 11 8 4
DTC P1225 TP SENSOR ....................................... 11 85
Component Description ....................................... 11 8 5
On Board Diagnosis Logic ................................... 11 8 5
DTC Confirmation Procedure ............................... 11 8 5
Diagnostic Procedure ........................................... 11 8 6
Removal and Installation ...................................... 11 8 6
DTC P1226 TP SENSOR ....................................... 11 87
Component Description ....................................... 11 8 7
On Board Diagnosis Logic ................................... 11 8 7
DTC Confirmation Procedure ............................... 11 8 7
Diagnostic Procedure ........................................... 11 8 8
Removal and Installation ...................................... 11 8 8
DTC P1421 COLD START CONTROL ................... 11 89
Description ........................................................... 11 8 9
On Board Diagnosis Logic ................................... 11 8 9
DTC Confirmation Procedure ............................... 11 8 9
Diagnostic Procedure ........................................... 11 8 9
DTC P1564 ICC STEERING SWITCH ................... 11 91
Component Description ....................................... 11 9 1
CONSULT-II Reference Value in Data Monitor Mode
11 9 1
On Board Diagnosis Logic ................................... 11 9 1
DTC Confirmation Procedure ............................... 11 9 2
Wiring Diagram .................................................... 11 9 3
Diagnostic Procedure ........................................... 11 9 4
Component Inspection ......................................... 11 9 7
DTC P1564 ASCD STEERING SWITCH ............... 11 98
Component Description ....................................... 11 9 8
CONSULT-II Reference Value in Data Monitor Mode 11 9 8
On Board Diagnosis Logic ................................... 11 9 8
DTC Confirmation Procedure ............................... 11 9 9
Wiring Diagram .................................................... 1200
Diagnostic Procedure ........................................... 1201
Component Inspection ......................................... 1204
DTC P1568 ICC FUNCTION .................................. 1205
On Board Diagnosis Logic ................................... 1205
DTC Confirmation Procedure ............................... 1205
Diagnostic Procedure ........................................... 1205
DTC P1572 ICC BRAKE SWITCH ......................... 1206
Component Description ....................................... 1206
CONSULT-II Reference Value in Data Monitor Mode 1206
On Board Diagnosis Logic ................................... 1206
DTC Confirmation Procedure ............................... 1207
Wiring Diagram .................................................... 1208

EC-14Revision: 2006 July 2007 FX35/FX45
Component Inspection .........................................
1286
Removal and Installation ..................................... 1286
DTC P2A00, P2A03 A/F SENSOR 1 ..................... 1287
Component Description ....................................... 1287
CONSULT-II Reference Value in Data Monitor Mode 1287
On Board Diagnosis Logic ................................... 1287
DTC Confirmation Procedure .............................. 1288
Wiring Diagram .................................................... 1289
Diagnostic Procedure .......................................... 1292
Removal and Installation ..................................... 1298
ASCD BRAKE SWITCH ......................................... 1299
Component Description ....................................... 1299
CONSULT-II Reference Value in Data Monitor Mode 1299
Wiring Diagram .................................................... 1300
Diagnostic Procedure .......................................... 1301
Component Inspection ......................................... 1305
ASCD INDICATOR ................................................. 1306
Component Description ....................................... 1306
CONSULT-II Reference Value in Data Monitor Mode 1306
Wiring Diagram .................................................... 1307
Diagnostic Procedure .......................................... 1308
ELECTRICAL LOAD SIGNAL ............................... 1309
Description ........................................................... 1309
CONSULT-II Reference Value in Data Monitor Mode 1309
Diagnostic Procedure .......................................... 1309
FUEL INJECTOR ................................................... 1311
Component Description ....................................... 1311
CONSULT-II Reference Value in Data Monitor Mode
1311
Wiring Diagram .................................................... 1312
Diagnostic Procedure .......................................... 1313
Component Inspection ......................................... 1317
Removal and Installation ..................................... 1317
FUEL PUMP ........................................................... 1318
Description ........................................................... 1318
CONSULT-II Reference Value in Data Monitor Mode 1318
Wiring Diagram .................................................... 1319
Diagnostic Procedure .......................................... 1320
Component Inspection ......................................... 1323
Removal and Installation ..................................... 1323
ICC BRAKE SWITCH ............................................. 1324
Component Description ....................................... 1324
CONSULT-II Reference Value in Data Monitor Mode 1324
Wiring Diagram .................................................... 1325
Diagnostic Procedure ........................................... 1326
Component Inspection ......................................... 1331
IGNITION SIGNAL ................................................. 1332
Component Description ....................................... 1332
Wiring Diagram .................................................... 1333
Diagnostic Procedure ........................................... 1338
Component Inspection ......................................... 1343
Removal and Installation ...................................... 1344
REFRIGERANT PRESSURE SENSOR ................. 1345
Component Description ....................................... 1345
Wiring Diagram .................................................... 1346
Diagnostic Procedure ........................................... 1347
Removal and Installation ...................................... 1349
SNOW MODE SWITCH .......................................... 1350
Description ........................................................... 1350
CONSULT-II Reference Value in the Data Monitor
Mode .................................................................... 1350
Wiring Diagram .................................................... 1351
Diagnostic Procedure ........................................... 1352
Component Inspection ......................................... 1354
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) ..................................................................... 1355
Description ........................................................... 1355
CONSULT-II Reference Value in Data Monitor Mode 1356
Wiring Diagram .................................................... 1357
Diagnostic Procedure ........................................... 1359
Component Inspection ......................................... 1362
Removal and Installation ...................................... 1363
MIL AND DATA LINK CONNECTOR ..................... 1364
Wiring Diagram .................................................... 1364
SERVICE DATA AND SPECIFICATIONS (SDS) ... 1366
Fuel Pressure ....................................................... 1366
Idle Speed and Ignition Timing ............................. 1366
Calculated Load Value ......................................... 1366
Mass Air Flow Sensor .......................................... 1366
Intake Air Temperature Sensor ............................ 1366
Engine Coolant Temperature Sensor ................... 1366
Fuel Tank Temperature Sensor ............................ 1366
Crankshaft Position Sensor (POS) ...................... 1366
Camshaft Position Sensor (PHASE) .................... 1366
A/F Sensor 1 Heater ............................................ 1366
Heated Oxygen sensor 2 Heater ......................... 1367
Throttle Control Motor .......................................... 1367
Fuel Injector ......................................................... 1367
Fuel Pump ............................................................ 1367

PRECAUTIONS EC-23
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2006 July 2007 FX35/FX45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS003KW
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Procedures without Cowl Top CoverNBS006SD
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnostic (OBD) System of Engine and A/TNBS003KX
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-71, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PIIB3706J

EC-24
[VQ35DE]
PRECAUTIONS
Revision: 2006 July 2007 FX35/FX45
PrecautionNBS003KY

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned OFF.

Before removing parts, turn ignition switch OFF and then
disconnect negative battery cable.

Do not disassemble ECM.

If a battery cable is disconnected, the memory will return to
the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is dis-
connected. However, this is not an indication of a malfunc-
tion. Do not replace parts because of a slight variation.

If the battery is disconnected, the following emission-
related diagnostic information will be lost within 24 hours.
–Diagnostic trouble codes
–1st trip diagnostic trouble codes
–Freeze frame data
–1st trip freeze frame data
–System readiness test (SRT) codes
–Test values

When connecting ECM harness connector, fasten it
securely with a lever as far as it will go as shown in the fig-
ure.

When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.

Keep engine control system harness at least 10 cm (4 in)
away from adjacent harness, to prevent engine control sys-
tem malfunctions due to receiving external noise, degraded
operation of ICs, etc.

Keep engine control system parts and harness dry.
SEF289H
PBIB1164E
PBIB1512E
PBIB0090E

EC-26
[VQ35DE]
PRECAUTIONS
Revision: 2006 July 2007 FX35/FX45

B1 indicates the bank 1, B2 indicates the bank 2 as shown
in the figure.

Do not operate fuel pump when there is no fuel in lines.

Tighten fuel hose clamps to the specified torque.

Do not depress accelerator pedal when starting.

Immediately after starting, do not rev up engine unneces-
sarily.

Do not rev up engine just prior to shutdown.

When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
SEC893C
PBIB1569E
SEF709Y
SEF708Y

ENGINE CONTROL SYSTEM EC-29
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2006 July 2007 FX35/FX45
ENGINE CONTROL SYSTEMPFP:23710
System DiagramNBS003L1
PBIB2281E