Nissan XTrail T30 2005 User Manual

B ENGINE

SECTION EC

ENGINE CONTROL SYSTEM

CONTENTS

A

EC

C

D

E

INDEX FOR DTC .......................................................	8
DTC No. Index ........................................................	8
Alphabetical Index ..................................................	11
PRECAUTIONS .......................................................	14
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................	14
On Board Diagnostic (OBD) System of Engine and
A/T .........................................................................	14
Precaution .............................................................	14
Wiring Diagrams and Trouble Diagnosis ...............	17
PREPARATION ........................................................	18
Special Service Tools ............................................	18
Commercial Service Tools .....................................	19
ENGINE CONTROL SYSTEM .................................	21
System Diagram ....................................................	21
Multiport Fuel Injection (MFI) System ...................	22
Electronic Ignition (EI) System ..............................	24
Fuel Cut Control (at No Load and High Engine
Speed) ...................................................................	25
AIR CONDITIONING CUT CONTROL ....................	26
Input/Output Signal Chart ......................................	26
AUTOMATIC SPEED CONTROL DEVICE (ASCD)...	27
System Description ...............................................	27
Component Description ..........................................	28
CAN COMMUNICATION .........................................	29
System Description ...............................................	29
EVAPORATIVE EMISSION SYSTEM ......................	30
Description ............................................................	30
Component Inspection ..........................................	33
Removal and Installation .......................................	34
How to Detect Fuel Vapor Leakage ......................	34
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) .....................................................................	37
System Description ...............................................	37
Diagnostic Procedure ............................................	38
Component Inspection ..........................................	41
POSITIVE CRANKCASE VENTILATION ................	44
Description ............................................................	44
Component Inspection ..........................................	44

NVIS (NISSAN 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) ..........................	61
OBD System Operation Chart ...............................	65
BASIC SERVICE PROCEDURE ..............................	70
Basic Inspection ....................................................	70
Idle Speed and Ignition Timing Check ...................	75
Idle Mixture Ratio Adjustment ................................	77
VIN Registration ....................................................	87
Accelerator Pedal Released Position Learning .....	88
Throttle Valve Closed Position Learning ................	88
Idle Air Volume Learning .......................................	88
Fuel Pressure Check .............................................	90
TROUBLE DIAGNOSIS ...........................................	94
Trouble Diagnosis Introduction ..............................	94
DTC Inspection Priority Chart ..............................	100
Fail-Safe Chart ....................................................	102
Symptom Matrix Chart .........................................	103
Engine Control Component Parts Location .........	107
Vacuum Hose Drawing ........................................	112
Circuit Diagram ....................................................	113
ECM Harness Connector Terminal Layout ..........	115
ECM Terminals and Reference Value ..................	115
CONSULT-II Function (ENGINE) .........................	123
Generic Scan Tool (GST) Function ......................	136
CONSULT-II Reference Value in Data Monitor ....	138
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................	142
TROUBLE DIAGNOSIS - SPECIFICATION VALUE. 144
Description ...........................................................	144
Testing Condition .................................................	144
Inspection Procedure ...........................................	144
Diagnostic Procedure ..........................................	145
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................	154

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2005 X-Trail

Description ...........................................................	154
Diagnostic Procedure ..........................................	154
POWER SUPPLY AND GROUND CIRCUIT ..........	155
Wiring Diagram ....................................................	155
Diagnostic Procedure ..........................................	156
Component Inspection .........................................	162
Ground Inspection ...............................................	162
DTC U1000, U1001 CAN COMMUNICATION LINE. 163
Description ...........................................................	163
On Board Diagnosis Logic ...................................	163
DTC Confirmation Procedure ..............................	163
Wiring Diagram ....................................................	164
Diagnostic Procedure ..........................................	165
DTC P0011 IVT CONTROL ....................................	166
Description ...........................................................	166
CONSULT-IIReferenceValueinDataMonitorMode
	. 166
On Board Diagnosis Logic ...................................	167
DTC Confirmation Procedure ..............................	167
Diagnostic Procedure ..........................................	168
Component Inspection .........................................	169
Removal and Installation .....................................	169
DTC P0031, P0032 HO2S1 HEATER ....................	170
Description ...........................................................	170
CONSULT-IIReferenceValueinDataMonitorMode
	. 170
On Board Diagnosis Logic ...................................	170
DTC Confirmation Procedure ..............................	171
Wiring Diagram ....................................................	172
Diagnostic Procedure ..........................................	173
Component Inspection .........................................	175
Removal and Installation .....................................	175
DTC P0037, P0038 HO2S2 HEATER ....................	176
Description ...........................................................	176
CONSULT-IIReferenceValueinDataMonitorMode
	. 176
On Board Diagnosis Logic ...................................	176
DTC Confirmation Procedure ..............................	177
Wiring Diagram ....................................................	178
Diagnostic Procedure ..........................................	179
Component Inspection .........................................	181
Removal and Installation .....................................	181
DTC P0101 MAF SENSOR ....................................	182
Component Description .......................................	182
CONSULT-IIReferenceValueinDataMonitorMode
	. 182
On Board Diagnosis Logic ...................................	182
DTC Confirmation Procedure ..............................	182
Overall Function Check .......................................	184
Wiring Diagram ....................................................	185
Diagnostic Procedure ..........................................	186
Component Inspection .........................................	189
Removal and Installation .....................................	190
DTC P0102, P0103 MAF SENSOR ........................	191
Component Description .......................................	191
CONSULT-IIReferenceValueinDataMonitorMode
	. 191
On Board Diagnosis Logic ...................................	191
DTC Confirmation Procedure ..............................	191

Wiring Diagram ....................................................	193
Diagnostic Procedure ...........................................	194
Component Inspection .........................................	197
Removal and Installation ......................................	198
DTC P0112, P0113 IAT SENSOR ...........................	199
Component Description .......................................	199
On Board Diagnosis Logic ...................................	199
DTC Confirmation Procedure ...............................	199
Wiring Diagram ....................................................	201
Diagnostic Procedure ...........................................	202
Component Inspection .........................................	204
Removal and Installation ......................................	204
DTC P0117, P0118 ECT SENSOR .........................	205
Component Description .......................................	205
On Board Diagnosis Logic ...................................	205
DTC Confirmation Procedure ...............................	206
Wiring Diagram ....................................................	207
Diagnostic Procedure ...........................................	208
Component Inspection .........................................	210
Removal and Installation ......................................	210
DTC P0122, P0123 TP SENSOR ...........................	211
Component Description .......................................	211
CONSULT-IIReferenceValueinDataMonitorMode
	. 211
On Board Diagnosis Logic ...................................	211
DTC Confirmation Procedure ...............................	212
Wiring Diagram ....................................................	213
Diagnostic Procedure ...........................................	215
Component Inspection .........................................	218
Remove and Installation ......................................	218
DTC P0125 ECT SENSOR .....................................	219
Description ...........................................................	219
On Board Diagnosis Logic ...................................	219
DTC Confirmation Procedure ...............................	219
Diagnostic Procedure ...........................................	220
Component Inspection .........................................	221
Removal and Installation ......................................	221
DTC P0127 IAT SENSOR .......................................	222
Component Description .......................................	222
On Board Diagnosis Logic ...................................	222
DTC Confirmation Procedure ...............................	222
Diagnostic Procedure ...........................................	223
Component Inspection .........................................	224
Removal and Installation ......................................	224
DTC P0128 THERMOSTAT FUNCTION ................	225
On Board Diagnosis Logic ...................................	225
DTC Confirmation Procedure ...............................	225
Diagnostic Procedure ...........................................	225
Component Inspection .........................................	226
Removal and Installation ......................................	226
DTC P0132 HO2S1 ................................................	227
Component Description .......................................	227
CONSULT-IIReferenceValueinDataMonitorMode
	.227
On Board Diagnosis Logic ...................................	227
DTC Confirmation Procedure ...............................	228
Wiring Diagram ....................................................	229
Diagnostic Procedure ...........................................	230

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EC-2

2005 X-Trail

Component Inspection ........................................	232
Removal and Installation .....................................	233
DTC P0133 HO2S1 ................................................	234
Component Description .......................................	234
CONSULT-IIReferenceValueinDataMonitorMode
	. 234
On Board Diagnosis Logic ..................................	234
DTC Confirmation Procedure ..............................	235
Overall Function Check .......................................	236
Wiring Diagram ...................................................	237
Diagnostic Procedure ..........................................	238
Component Inspection ........................................	242
Removal and Installation .....................................	243
DTC P0134 HO2S1 ................................................	244
Component Description .......................................	244
CONSULT-IIReferenceValueinDataMonitorMode
	. 244
On Board Diagnosis Logic ..................................	244
DTC Confirmation Procedure ..............................	245
Overall Function Check .......................................	246
Wiring Diagram ...................................................	247
Diagnostic Procedure ..........................................	248
Component Inspection ........................................	250
Removal and Installation .....................................	251
DTC P0138 HO2S2 ................................................	252
Component Description .......................................	252
CONSULT-IIReferenceValueinDataMonitorMode
	. 252
On Board Diagnosis Logic ..................................	252
DTC Confirmation Procedure ..............................	252
Wiring Diagram ...................................................	254
Diagnostic Procedure ..........................................	255
Component Inspection ........................................	257
Removal and Installation .....................................	258
DTC P0139 HO2S2 ................................................	259
Component Description .......................................	259
CONSULT-IIReferenceValueinDataMonitorMode
	. 259
On Board Diagnosis Logic ..................................	259
DTC Confirmation Procedure ..............................	260
Overall Function Check .......................................	260
Wiring Diagram ...................................................	262
Diagnostic Procedure ..........................................	263
Component Inspection ........................................	265
Removal and Installation .....................................	266
DTCP0171FUELINJECTIONSYSTEMFUNCTION. 267
On Board Diagnosis Logic ..................................	267
DTC Confirmation Procedure ..............................	267
Wiring Diagram ...................................................	269
Diagnostic Procedure ..........................................	270
DTCP0172FUELINJECTIONSYSTEMFUNCTION. 274
On Board Diagnosis Logic ..................................	274
DTC Confirmation Procedure ..............................	274
Wiring Diagram ...................................................	276
Diagnostic Procedure ..........................................	277
DTC P0181 FTT SENSOR .....................................	280
Component Description .......................................	280
On Board Diagnosis Logic ..................................	280
DTC Confirmation Procedure ..............................	280

Wiring Diagram ....................................................	282
Diagnostic Procedure ..........................................	283
Component Inspection .........................................	285
Removal and Installation .....................................	285
DTC P0182, P0183 FTT SENSOR .........................	286
Component Description .......................................	286
On Board Diagnosis Logic ...................................	286
DTC Confirmation Procedure ..............................	286
Wiring Diagram ....................................................	287
Diagnostic Procedure ..........................................	288
Component Inspection .........................................	290
Removal and Installation .....................................	290
DTC P0222, P0223 TP SENSOR ...........................	291
Component Description .......................................	291
CONSULT-IIReferenceValueinDataMonitorMode
	. 291
On Board Diagnosis Logic ...................................	291
DTC Confirmation Procedure ..............................	292
Wiring Diagram ....................................................	293
Diagnostic Procedure ..........................................	295
Component Inspection .........................................	298
Remove and Installation ......................................	298
DTC P0300 - P0304 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 4 CYLINDER MISFIRE ....................	299
On Board Diagnosis Logic ...................................	299
DTC Confirmation Procedure ..............................	299
Diagnostic Procedure ..........................................	300
DTC P0327, P0328 KS ..........................................	306
Component Description .......................................	306
On Board Diagnosis Logic ...................................	306
DTC Confirmation Procedure ..............................	306
Wiring Diagram ....................................................	307
Diagnostic Procedure ..........................................	308
Component Inspection .........................................	310
Removal and Installation .....................................	310
DTC P0335 CKP SENSOR (POS) .........................	311
Component Description .......................................	311
CONSULT-IIReferenceValueinDataMonitorMode
	. 311
On Board Diagnosis Logic ...................................	311
DTC Confirmation Procedure ..............................	312
Wiring Diagram ....................................................	313
Diagnostic Procedure ..........................................	315
Component Inspection .........................................	318
Removal and Installation .....................................	318
DTC P0340 CMP SENSOR (PHASE) ....................	319
Component Description .......................................	319
On Board Diagnosis Logic ...................................	319
DTC Confirmation Procedure ..............................	320
Wiring Diagram ....................................................	321
Diagnostic Procedure ..........................................	322
Component Inspection .........................................	325
Removal and Installation .....................................	326
DTC P0420 THREE WAY CATALYST FUNCTION . 327
On Board Diagnosis Logic ...................................	327
DTC Confirmation Procedure ..............................	327
Overall Function Check .......................................	328
Diagnostic Procedure ..........................................	329
DTC P0441 EVAP CONTROL SYSTEM ................	332

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System Description ..............................................	332
On Board Diagnosis Logic ...................................	332
DTC Confirmation Procedure ..............................	333
Overall Function Check .......................................	333
Diagnostic Procedure ..........................................	334
DTC P0442 EVAP CONTROL SYSTEM ................	338
On Board Diagnosis Logic ...................................	338
DTC Confirmation Procedure ..............................	339
Diagnostic Procedure ..........................................	341
Component Inspection .........................................	347
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE .....................	348
Description ...........................................................	348
CONSULT-IIReferenceValueinDataMonitorMode
. 348
On Board Diagnosis Logic ...................................	349
DTC Confirmation Procedure ..............................	349
Wiring Diagram ....................................................	350
Diagnostic Procedure ..........................................	352
Component Inspection .........................................	353
Removal and Installation .....................................	354
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE ....................................................................	355
Component Description .......................................	355
CONSULT-IIReferenceValueinDataMonitorMode
. 355
On Board Diagnosis Logic ...................................	355
DTC Confirmation Procedure ..............................	356
Wiring Diagram ....................................................	357
Diagnostic Procedure ..........................................	358
Component Inspection .........................................	360
DTCP0451EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	362
Component Description .......................................	362
CONSULT-IIReferenceValueinDataMonitorMode
. 362
On Board Diagnosis Logic ...................................	362
DTC Confirmation Procedure ..............................	363
Diagnostic Procedure ..........................................	363
Component Inspection .........................................	364
DTCP0452EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	365
Component Description .......................................	365
CONSULT-IIReferenceValueinDataMonitorMode
. 365
On Board Diagnosis Logic ...................................	365
DTC Confirmation Procedure ..............................	366
Wiring Diagram ....................................................	367
Diagnostic Procedure ..........................................	368
Component Inspection .........................................	371
DTCP0453EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	372
Component Description .......................................	372
CONSULT-IIReferenceValueinDataMonitorMode
. 372
On Board Diagnosis Logic ...................................	372
DTC Confirmation Procedure ..............................	373
Wiring Diagram ....................................................	374

Diagnostic Procedure ...........................................	375
Component Inspection .........................................	379
DTC P0455 EVAP CONTROL SYSTEM ................	380
On Board Diagnosis Logic ...................................	380
DTC Confirmation Procedure ...............................	381
Diagnostic Procedure ...........................................	382
DTC P0456 EVAP CONTROL SYSTEM ................	388
On Board Diagnosis Logic ...................................	388
DTC Confirmation Procedure ...............................	389
Overall Function Check ........................................	390
Diagnostic Procedure ...........................................	391
Component Inspection .........................................	398
DTC P0460 FUEL LEVEL SENSOR ......................	399
Component Description .......................................	399
On Board Diagnostic Logic ..................................	399
DTC Confirmation Procedure ...............................	399
Diagnostic Procedure ...........................................	400
Removal and Installation ......................................	400
DTC P0461 FUEL LEVEL SENSOR ......................	401
Component Description .......................................	401
On Board Diagnostic Logic ..................................	401
Overall Function Check ........................................	401
Diagnostic Procedure ...........................................	402
Removal and Installation ......................................	402
DTC P0462, P0463 FUEL LEVEL SENSOR ..........	403
Component Description .......................................	403
On Board Diagnostic Logic ..................................	403
DTC Confirmation Procedure ...............................	403
Diagnostic Procedure ...........................................	404
Removal and Installation ......................................	404
DTC P0500 VSS .....................................................	405
Description ...........................................................	405
On Board Diagnosis Logic ...................................	405
DTC Confirmation Procedure ...............................	405
Overall Function Check ........................................	406
Diagnostic Procedure ...........................................	406
DTC P0506 ISC SYSTEM ......................................	407
Description ...........................................................	407
On Board Diagnosis Logic ...................................	407
DTC Confirmation Procedure ...............................	407
Diagnostic Procedure ...........................................	408
DTC P0507 ISC SYSTEM ......................................	409
Description ...........................................................	409
On Board Diagnosis Logic ...................................	409
DTC Confirmation Procedure ...............................	409
Diagnostic Procedure ...........................................	410
DTC P0550 PSP SENSOR .....................................	411
Component Description .......................................	411
CONSULT-IIReferenceValueinDataMonitorMode
	. 411
On Board Diagnosis Logic ...................................	411
DTC Confirmation Procedure ...............................	411
Wiring Diagram ....................................................	412
Diagnostic Procedure ...........................................	413
Component Inspection .........................................	415
Removal and Installation ......................................	415
DTC P0605 ECM ....................................................	416
Component Description .......................................	416
On Board Diagnosis Logic ...................................	416

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EC-4

2005 X-Trail

DTC Confirmation Procedure ..............................	416
Diagnostic Procedure ..........................................	417
DTC P1065 ECM POWER SUPPLY ......................	419
Component Description .......................................	419
On Board Diagnosis Logic ..................................	419
DTC Confirmation Procedure ..............................	419
Wiring Diagram ...................................................	420
Diagnostic Procedure ..........................................	421
DTC P1111 IVT CONTROL SOLENOID VALVE ... 423
Component Description .......................................	423
CONSULT-IIReferenceValueinDataMonitorMode
. 423
On Board Diagnosis Logic ..................................	423
DTC Confirmation Procedure ..............................	423
Wiring Diagram ...................................................	424
Diagnostic Procedure ..........................................	425
Component Inspection ........................................	426
Removal and Installation .....................................	426
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ...........................................................	427
Component Description .......................................	427
On Board Diagnosis Logic ..................................	427
DTC Confirmation Procedure ..............................	427
Diagnostic Procedure ..........................................	428
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................	429
Description ..........................................................	429
On Board Diagnosis Logic ..................................	429
DTC Confirmation Procedure ..............................	429
Wiring Diagram ...................................................	430
Diagnostic Procedure ..........................................	432
Component Inspection ........................................	436
Remove and Installation ......................................	436
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY ...................................................................	437
Component Description .......................................	437
CONSULT-IIReferenceValueinDataMonitorMode
. 437
On Board Diagnosis Logic ..................................	437
DTC Confirmation Procedure ..............................	437
Wiring Diagram ...................................................	439
Diagnostic Procedure ..........................................	440
Component Inspection ........................................	442
DTC P1128 THROTTLE CONTROL MOTOR .......	443
Component Description .......................................	443
On Board Diagnosis Logic ..................................	443
DTC Confirmation Procedure ..............................	443
Wiring Diagram ...................................................	444
Diagnostic Procedure ..........................................	446
Component Inspection ........................................	447
Removal and Installation .....................................	447
DTC P1143 HO2S1 ................................................	448
Component Description .......................................	448
CONSULT-IIReferenceValueinDataMonitorMode
. 448
On Board Diagnosis Logic ..................................	448
DTC Confirmation Procedure ..............................	449
Overall Function Check .......................................	449
Diagnostic Procedure ..........................................	450

Component Inspection .........................................	452
Removal and Installation .....................................	453
DTC P1144 HO2S1 ................................................	454
Component Description .......................................	454
CONSULT-IIReferenceValueinDataMonitorMode
	. 454
On Board Diagnosis Logic ...................................	454
DTC Confirmation Procedure ..............................	455
Overall Function Check .......................................	455
Diagnostic Procedure ..........................................	456
Component Inspection .........................................	458
Removal and Installation .....................................	459
DTC P1146 HO2S2 ................................................	460
Component Description .......................................	460
CONSULT-IIReferenceValueinDataMonitorMode
	. 460
On Board Diagnosis Logic ...................................	460
DTC Confirmation Procedure ..............................	461
Overall Function Check .......................................	461
Wiring Diagram ....................................................	463
Diagnostic Procedure ..........................................	464
Component Inspection .........................................	466
Removal and Installation .....................................	467
DTC P1147 HO2S2 ................................................	468
Component Description .......................................	468
CONSULT-IIReferenceValueinDataMonitorMode
	. 468
On Board Diagnosis Logic ...................................	468
DTC Confirmation Procedure ..............................	469
Overall Function Check .......................................	469
Wiring Diagram ....................................................	471
Diagnostic Procedure ..........................................	472
Component Inspection .........................................	474
Removal and Installation .....................................	475
DTC P1148 CLOSED LOOP CONTROL ...............	476
On Board Diagnosis Logic ...................................	476
DTC Confirmation Procedure ..............................	476
Overall Function Check .......................................	476
Diagnostic Procedure ..........................................	477
DTC P1211 TCS CONTROL UNIT .........................	478
Description ...........................................................	478
On Board Diagnosis Logic ...................................	478
DTC Confirmation Procedure ..............................	478
Diagnostic Procedure ..........................................	478
DTC P1212 TCS COMMUNICATION LINE ...........	479
Description ...........................................................	479
On Board Diagnosis Logic ...................................	479
DTC Confirmation Procedure ..............................	479
Diagnostic Procedure ..........................................	479
DTC P1217 ENGINE OVER TEMPERATURE .......	480
Description ...........................................................	480
CONSULT-IIReferenceValueinDataMonitorMode
	. 481
On Board Diagnosis Logic ...................................	481
Overall Function Check .......................................	481
Wiring Diagram ....................................................	484
Diagnostic Procedure ..........................................	485
Main 12 Causes of Overheating ..........................	492
Component Inspection .........................................	493

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DTC P1225 TP SENSOR .......................................	495
Component Description .......................................	495
On Board Diagnosis Logic ...................................	495
DTC Confirmation Procedure ..............................	495
Diagnostic Procedure ..........................................	496
Remove and Installation ......................................	496
DTC P1226 TP SENSOR .......................................	497
Component Description .......................................	497
On Board Diagnosis Logic ...................................	497
DTC Confirmation Procedure ..............................	497
Diagnostic Procedure ..........................................	498
Remove and Installation ......................................	498
DTC P1229 SENSOR POWER SUPPLY ...............	499
On Board Diagnosis Logic ...................................	499
DTC Confirmation Procedure ..............................	499
Wiring Diagram ....................................................	500
Diagnostic Procedure ..........................................	501
DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ..............................	504
Description ...........................................................	504
CONSULT-IIReferenceValueinDataMonitorMode
	. 504
On Board Diagnosis Logic ...................................	505
DTC Confirmation Procedure ..............................	505
Wiring Diagram ....................................................	506
Diagnostic Procedure ..........................................	508
Component Inspection .........................................	510
Removal and Installation .....................................	511
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE ....................................................................	512
Component Description .......................................	512
CONSULT-IIReferenceValueinDataMonitorMode
	. 512
On Board Diagnosis Logic ...................................	512
DTC Confirmation Procedure ..............................	513
Wiring Diagram ....................................................	514
Diagnostic Procedure ..........................................	515
Component Inspection .........................................	517
DTC P1564 ASCD STEERING SWITCH ...............	519
Component Description .......................................	519
CONSULT-IIReferenceValueinDataMonitorMode
	. 519
On Board Diagnosis Logic ...................................	519
DTC Confirmation Procedure ..............................	520
Wiring Diagram ....................................................	521
Diagnostic Procedure ..........................................	523
Component Inspection .........................................	526
DTC P1572 ASCD BRAKE SWITCH .....................	527
Component Description .......................................	527
CONSULT-IIReferenceValueinDataMonitorMode
	. 527
On Board Diagnosis Logic ...................................	527
DTC Confirmation Procedure ..............................	528
Wiring Diagram ....................................................	529
Diagnostic Procedure ..........................................	531
Component Inspection .........................................	536
DTC P1574 ASCD VEHICLE SPEED SENSOR ....	538
Component Description .......................................	538
On Board Diagnosis Logic ...................................	538

DTC Confirmation Procedure ...............................	538
Diagnostic Procedure ...........................................	539
DTC P1706 PNP SWITCH ......................................	540
Component Description .......................................	540
CONSULT-IIReferenceValueinDataMonitorMode
	.540
On Board Diagnosis Logic ...................................	540
DTC Confirmation Procedure ...............................	540
Overall Function Check ........................................	541
Wiring Diagram ....................................................	542
Diagnostic Procedure ...........................................	543
DTC P1800 VIAS CONTROL SOLENOID VALVE .545
Component Description .......................................	545
CONSULT-IIReferenceValueinDataMonitorMode
	.545
On Board Diagnosis Logic ...................................	545
DTC Confirmation Procedure ...............................	545
Wiring Diagram ....................................................	546
Diagnostic Procedure ...........................................	547
Component Inspection .........................................	548
Removal and Installation ......................................	549
DTC P1805 BRAKE SWITCH ................................	550
Description ...........................................................	550
CONSULT-IIReferenceValueinDataMonitorMode
	.550
On Board Diagnosis Logic ...................................	550
DTC Confirmation Procedure ...............................	550
Wiring Diagram ....................................................	551
Diagnostic Procedure ...........................................	552
Component Inspection .........................................	554
DTC P2122, P2123 APP SENSOR ........................	555
Component Description .......................................	555
CONSULT-IIReferenceValueinDataMonitorMode
	.555
On Board Diagnosis Logic ...................................	555
DTC Confirmation Procedure ...............................	556
Wiring Diagram ....................................................	557
Diagnostic Procedure ...........................................	559
Component Inspection .........................................	561
Removal and Installation ......................................	561
DTC P2127, P2128 APP SENSOR ........................	562
Component Description .......................................	562
CONSULT-IIReferenceValueinDataMonitorMode
	.562
On Board Diagnosis Logic ...................................	562
DTC Confirmation Procedure ...............................	563
Wiring Diagram ....................................................	564
Diagnostic Procedure ...........................................	566
Component Inspection .........................................	569
Remove and Installation ......................................	569
DTC P2135 TP SENSOR .......................................	570
Component Description .......................................	570
CONSULT-IIReferenceValueinDataMonitorMode
	.570
On Board Diagnosis Logic ...................................	570
DTC Confirmation Procedure ...............................	570
Wiring Diagram ....................................................	572
Diagnostic Procedure ...........................................	574

Revision: 2005 March

EC-6

2005 X-Trail

Component Inspection ........................................	577
Remove and Installation ......................................	577
DTC P2138 APP SENSOR ....................................	578
Component Description .......................................	578
CONSULT-IIReferenceValueinDataMonitorMode
	. 578
On Board Diagnosis Logic ..................................	578
DTC Confirmation Procedure ..............................	579
Wiring Diagram ...................................................	580
Diagnostic Procedure ..........................................	582
Component Inspection ........................................	585
Remove and Installation ......................................	585
IGNITION SIGNAL .................................................	586
Component Description .......................................	586
Wiring Diagram ...................................................	587
Diagnostic Procedure ..........................................	590
Component Inspection ........................................	595
Removal and Installation .....................................	596
VIAS .......................................................................	597
Description ..........................................................	597
CONSULT-IIReferenceValueinDataMonitorMode
	. 598
Wiring Diagram ...................................................	599
Diagnostic Procedure ..........................................	601
Component Inspection ........................................	605
Removal and Installation .....................................	606
INJECTOR CIRCUIT ..............................................	607
Component Description .......................................	607
CONSULT-IIReferenceValueinDataMonitorMode
	. 607
Wiring Diagram ...................................................	608
Diagnostic Procedure ..........................................	609
Component Inspection ........................................	612
Removal and Installation .....................................	612
FUEL PUMP CIRCUIT ...........................................	613
Description ..........................................................	613
CONSULT-IIReferenceValueinDataMonitorMode
	. 613
Wiring Diagram ...................................................	614
Diagnostic Procedure ..........................................	615
Component Inspection ........................................	618
Removal and Installation .....................................	618
REFRIGERANT PRESSURE SENSOR ................	619
Component Description .......................................	619
Wiring Diagram ...................................................	620
Diagnostic Procedure ..........................................	621
Removal and Installation .....................................	624

ELECTRICAL LOAD SIGNAL ...............................	625
CONSULT-IIReferenceValueinDataMonitorMode
. 625
Wiring Diagram ....................................................	626
Diagnostic Procedure ..........................................	627
Wiring Diagram ....................................................	632
Diagnostic Procedure ..........................................	633
Wiring Diagram ....................................................	635
Diagnostic Procedure ..........................................	636
ASCD BRAKE SWITCH ........................................	638
Component Description .......................................	638
CONSULT-IIReferenceValueinDataMonitorMode
. 638
Wiring Diagram ....................................................	639
Diagnostic Procedure ..........................................	641
Component Inspection .........................................	646
ASCD INDICATOR .................................................	648
Component Description .......................................	648
CONSULT-IIReferenceValueinDataMonitorMode
. 648
Wiring Diagram ....................................................	649
Diagnostic Procedure ..........................................	651
SNOW MODE SWITCH .........................................	652
Description ...........................................................	652
CONSULT-II Reference Value in the Data Monitor
Mode ....................................................................	652
Wiring Diagram ....................................................	653
Diagnostic Procedure ..........................................	655
Component Inspection .........................................	658
MIL AND DATA LINK CONNECTOR .....................	659
Wiring Diagram ....................................................	659
SERVICE DATA AND SPECIFICATIONS (SDS) ...	663
Fuel Pressure ......................................................	663
Idle Speed and Ignition Timing ............................	663
Calculated Load Value .........................................	663
Mass Air Flow Sensor ..........................................	663
Intake Air Temperature Sensor ............................	663
Engine Coolant Temperature Sensor ..................	663
Heated Oxygen Sensor 1 Heater ........................	663
Heated Oxygen Sensor 2 Heater ........................	663
Crankshaft Position Sensor (POS) ......................	663
Camshaft Position Sensor (PHASE) ...................	663
Throttle Control Motor ..........................................	664
Fuel Injector .........................................................	664
Fuel Pump ...........................................................	664

A

EC

C

D

E

F

G

H

I

J

K

L

M

Revision: 2005 March

EC-7

2005 X-Trail

INDEX FOR DTC

INDEX FOR DTC

DTC No. Index

PFP:00024

ABS00D80

NOTE:

If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000, U1001. Refer to EC-163, "DTC U1000, U1001 CAN COMMUNICATION LINE" .

	DTC*1		Items
				Reference page
CONSULT-II
		ECM*3	(CONSULT-II screen terms)
GST*2
			NO DTC IS DETECTED.
No DTC		Flashing*6	FURTHER TESTING	EC-62
			MAY BE REQUIRED.
U1000		1000*4	CAN COMM CIRCUIT	EC-163
U1001		1001*4	CAN COMM CIRCUIT	EC-163
			NO DTC IS DETECTED.
P0000		0000	FURTHER TESTING	—
			MAY BE REQUIRED.
P0011		0011	INT/V TIM CONT-B1	EC-166
P0031		0031	HO2S1 HTR (B1)	EC-170
P0032		0032	HO2S1 HTR (B1)	EC-170
P0037		0037	HO2S2 HTR (B1)	EC-176
P0038		0038	HO2S2 HTR (B1)	EC-176
P0101		0101	MAF SEN/CIRCUIT	EC-182
P0102		0102	MAF SEN/CIRCUIT	EC-191
P0103		0103	MAF SEN/CIRCUIT	EC-191
P0112		0112	IAT SEN/CIRCUIT	EC-199
P0113		0113	IAT SEN/CIRCUIT	EC-199
P0117		0117	ECT SEN/CIRC	EC-205
P0118		0118	ECT SEN/CIRC	EC-205
P0122		0122	TP SEN 2/CIRC	EC-211
P0123		0123	TP SEN 2/CIRC	EC-211
P0125		0125	ECT SENSOR	EC-219
P0127		0127	IAT SENSOR	EC-222
P0128		0128	THERMSTAT FNCTN	EC-225
P0132		0132	HO2S1 (B1)	EC-225
P0133		0133	HO2S1 (B1)	EC-234
P0134		0134	HO2S1 (B1)	EC-244
P0138		0138	HO2S2 (B1)	EC-252
P0139		0139	HO2S2 (B1)	EC-259
P0171		0171	FUEL SYS-LEAN-B1	EC-267
P0172		0172	FUEL SYS-RICH-B1	EC-274
P0181		0181	FTT SENSOR	EC-280
P0182		0182	FTT SEN/CIRCUIT	EC-286
P0183		0183	FTT SEN/CIRCUIT	EC-286
P0222		0222	TP SEN 1/CIRC	EC-291
P0223		0223	TP SEN 1/CIRC	EC-291
P0300		0300	MULTI CYL MISFIRE	EC-299
P0301		0301	CYL 1 MISFIRE	EC-299

Revision: 2005 March

EC-8

2005 X-Trail

INDEX FOR DTC

	DTC*1		Items			A
				Reference page
CONSULT-II
		ECM*3	(CONSULT-II screen terms)
GST*2
P0302		0302	CYL 2 MISFIRE	EC-299		EC
P0303		0303	CYL 3 MISFIRE	EC-299
P0304		0304	CYL 4 MISFIRE	EC-299
						C
P0327		0327	KNOCK SEN/CIRC-B1	EC-306
P0328		0328	KNOCK SEN/CIRC-B1	EC-306
P0335		0335	CKP SEN/CIRCUIT	EC-311		D
P0340		0340	CMP SEN/CIRC-B1	EC-319
P0420		0420	TW CATALYST SYS-B1	EC-327
						E
P0441		0441	EVAP PURG FLOW/MON	EC-332
P0442		0442	EVAP SMALL LEAK	EC-338
P0444		0444	PURG VOLUME CONT/V	EC-348		F
P0445		0445	PURG VOLUME CONT/V	EC-348
P0447		0447	VENT CONTROL VALVE	EC-355
P0451		0451	EVAP SYS PRES SEN	EC-362		G
P0452		0452	EVAP SYS PRES SEN	EC-365
P0453		0453	EVAP SYS PRES SEN	EC-372
						H
P0455		0455	EVAP GROSS LEAK	EC-380
P0456		0456	EVAP VERY SML LEAK	EC-388
P0460		0460	FUEL LEV SEN SLOSH	EC-399		I
P0461		0461	FUEL LEVEL SENSOR	EC-401
P0462		0462	FUEL LEVL SEN/CIRC	EC-403
						J
P0463		0463	FUEL LEVL SEN/CIRC	EC-403
P0500		0500	VEH SPEED SEN/CIRC*5	EC-405
P0506		0506	ISC SYSTEM	EC-407		K
P0507		0507	ISC SYSTEM	EC-409
P0550		0550	PW ST P SEN/CIRC	EC-411
						L
P0605		0605	ECM	EC-416
P0705		0705	PNP SW/CIRC	AT-98
P0710		0710	ATF TEMP SEN/CIRC	AT-104		M
P0720		0720	VEH SPD SEN/CIR AT*5	AT-109
P0725		0725	ENGINE SPEED SIG	AT-115
P0731		0731	A/T 1ST GR FNCTN	AT-120
P0732		0732	A/T 2ND GR FNCTN	AT-125
P0733		0733	A/T 3RD GR FNCTN	AT-130
P0734		0734	A/T 4TH GR FNCTN	AT-135
P0740		0740	TCC SOLENOID/CIRC	AT-142
P0744		0744	A/T TCC S/V FNCTN	AT-147
P0745		0745	L/PRESS SOL/CIRC	AT-155
P0750		0750	SFT SOL A/CIRC	AT-162
P0755		0755	SFT SOL B/CIRC	AT-167
P1065		1065	ECM BACK UP/CIRC	EC-419
P1111		1111	INT/V TIM V/CIR-B1	EC-423

Revision: 2005 March

EC-9

2005 X-Trail

			INDEX FOR DTC
	DTC*1		Items
				Reference page
CONSULT-II
		ECM*3	(CONSULT-II screen terms)
GST*2
P1121		1121	ETC ACTR	EC-427
P1122		1122	ETC FUNCTION/CIRC	EC-429
P1124		1124	ETC MOT PWR	EC-437
P1126		1126	ETC MOT PWR	EC-437
P1128		1128	ETC MOT	EC-443
P1143		1143	HO2S1 (B1)	EC-448
P1144		1144	HO2S1 (B1)	EC-454
P1146		1146	HO2S2 (B1)	EC-460
P1147		1147	HO2S2 (B1)	EC-468
P1148		1148	CLOSED LOOP-B1	EC-476
P1211		1211	TCS C/U FUNCTION	EC-478
P1212		1212	TCS/CIRC	EC-479
P1217		1217	ENG OVER TEMP	EC-480
P1225		1225	CTP LEARNING	EC-495
P1226		1226	CTP LEARNING	EC-497
P1229		1229	SENSOR POWER/CIRC	EC-499
P1444		1444	PURG VOLUME CONT/V	EC-504
P1446		1446	VENT CONTROL VALVE	EC-512
P1564		1564	ASCD SW	EC-519
P1572		1572	ASCD BRAKE SW	EC-527
P1574		1574	ASCD VHL SPD SEN	EC-538
P1610 - P1615		1610 - 1615	NATS MALFUNCTION	EC-46
P1705		1705	TP SEN/CIRC A/T	AT-172
P1706		1706	P-N POS SW/CIRCUIT	EC-540
P1720		1720	V/SP SEN (A/T OUT)	AT-109
P1760		1760	O/R CLTCH SOL/CIRC	AT-177
P1800		1800	VIAS S/V CIRC	EC-545
P1805		1805	BRAKE SW/CIRCUIT	EC-550
P2122		2122	APP SEN 1/CIRC	EC-555
P2123		2123	APP SEN 1/CIRC	EC-555
P2127		2127	APP SEN 2/CIRC	EC-562
P2128		2128	APP SEN 2/CIRC	EC-562
P2135		2135	TP SENSOR	EC-570
P2138		2138	APP SENSOR	EC-578

*1: 1st trip DTC No. is the same as DTC No. *2: This number is prescribed by SAE J2012.

*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN. *4: The troubleshooting for this DTC needs CONSULT-II.

*5: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates. *6: When engine is running.

Revision: 2005 March

EC-10

2005 X-Trail

INDEX FOR DTC

Alphabetical Index

ABS00D7Z

NOTE:

If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000, U1001. Refer to EC-163, "DTC U1000, U1001 CAN COMMUNICATION LINE" .

Items		DTC*1
				Reference page
	CONSULT-II
(CONSULT-II screen terms)			ECM*3
	GST*2
A/T 1ST GR FNCTN	P0731		0731	AT-120
A/T 2ND GR FNCTN	P0732		0732	AT-125
A/T 3RD GR FNCTN	P0733		0733	AT-130
A/T 4TH GR FNCTN	P0734		0734	AT-135
A/T TCC S/V FNCTN	P0744		0744	AT-147
APP SEN 1/CIRC	P2122		2122	EC-555
APP SEN 1/CIRC	P2123		2123	EC-555
APP SEN 2/CIRC	P2127		2127	EC-562
APP SEN 2/CIRC	P2128		2128	EC-562
APP SENSOR	P2138		2138	EC-578
ASCD BRAKE SW	P1572		1572	EC-527
ASCD SW	P1564		1564	EC-519
ASCD VHL SPD SEN	P1574		1574	EC-538
ATF TEMP SEN/CIRC	P0710		0710	AT-104
BRAKE SW/CIRCUIT	P1805		1805	EC-550
CAN COMM CIRCUIT	U1000		1000*4	EC-163
CAN COMM CIRCUIT	U1001		1001*4	EC-163
CKP SEN/CIRCUIT	P0335		0335	EC-311
CLOSED LOOP-B1	P1148		1148	EC-476
CMP SEN/CIRC-B1	P0340		0340	EC-319
CTP LEARNING	P1225		1225	EC-495
CTP LEARNING	P1226		1226	EC-497
CYL 1 MISFIRE	P0301		0301	EC-299
CYL 2 MISFIRE	P0302		0302	EC-299
CYL 3 MISFIRE	P0303		0303	EC-299
CYL 4 MISFIRE	P0304		0304	EC-299
ECM	P0605		0605	EC-416
ECM BACK UP/CIRC	P1065		1065	EC-419
ECT SEN/CIRC	P0117		0117	EC-205
ECT SEN/CIRC	P0118		0118	EC-205
ECT SENSOR	P0125		0125	EC-219
ENG OVER TEMP	P1217		1217	EC-480
ENGINE SPEED SIG	P0725		0725	AT-115
ETC ACTR	P1121		1121	EC-427
ETC FUNCTION/CIRC	P1122		1122	EC-429
ETC MOT	P1128		1128	EC-443
ETC MOT PWR	P1124		1124	EC-437
ETC MOT PWR	P1126		1126	EC-437
EVAP GROSS LEAK	P0455		0455	EC-380

A

EC

C

D

E

F

G

H

I

J

K

L

M

Revision: 2005 March

EC-11

2005 X-Trail

INDEX FOR DTC

Items		DTC*1
				Reference page
	CONSULT-II
(CONSULT-II screen terms)			ECM*3
	GST*2
EVAP PURG FLOW/MON	P0441		0441	EC-332
EVAP SMALL LEAK	P0442		0442	EC-338
EVAP SYS PRES SEN	P0451		0451	EC-362
EVAP SYS PRES SEN	P0452		0452	EC-365
EVAP SYS PRES SEN	P0453		0453	EC-372
EVAP VERY SML LEAK	P0456		0456	EC-388
FTT SEN/CIRCUIT	P0182		0182	EC-286
FTT SEN/CIRCUIT	P0183		0183	EC-286
FTT SENSOR	P0181		0181	EC-280
FUEL LEV SEN SLOSH	P0460		0460	EC-399
FUEL LEVEL SENSOR	P0461		0461	EC-401
FUEL LEVL SEN/CIRC	P0462		0462	EC-403
FUEL LEVL SEN/CIRC	P0463		0463	EC-403
FUEL SYS-LEAN-B1	P0171		0171	EC-267
FUEL SYS-RICH-B1	P0172		0172	EC-274
HO2S1 (B1)	P0132		0132	EC-227
HO2S1 (B1)	P0133		0133	EC-234
HO2S1 (B1)	P0134		0134	EC-244
HO2S1 (B1)	P1143		1143	EC-448
HO2S1 (B1)	P1144		1144	EC-454
HO2S1 HTR (B1)	P0031		0031	EC-170
HO2S1 HTR (B1)	P0032		0032	EC-170
HO2S2 (B1)	P0138		0138	EC-252
HO2S2 (B1)	P0139		0139	EC-259
HO2S2 (B1)	P1146		1146	EC-460
HO2S2 (B1)	P1147		1147	EC-468
HO2S2 HTR (B1)	P0037		0037	EC-176
HO2S2 HTR (B1)	P0038		0038	EC-176
IAT SEN/CIRCUIT	P0112		0112	EC-199
IAT SEN/CIRCUIT	P0113		0113	EC-199
IAT SENSOR	P0127		0127	EC-222
INT/V TIM CONT-B1	P0011		0011	EC-166
INT/V TIM V/CIR-B1	P1111		1111	EC-423
ISC SYSTEM	P0506		0506	EC-407
ISC SYSTEM	P0507		0507	EC-409
KNOCK SEN/CIRC-B1	P0327		0327	EC-306
KNOCK SEN/CIRC-B1	P0328		0328	EC-306
L/PRESS SOL/CIRC	P0745		0745	AT-155
MAF SEN/CIRCUIT	P0101		0101	EC-182
MAF SEN/CIRCUIT	P0102		0102	EC-191
MAF SEN/CIRCUIT	P0103		0103	EC-191
MULTI CYL MISFIRE	P0300		0300	EC-299

Revision: 2005 March

EC-12

2005 X-Trail

INDEX FOR DTC

Items		DTC*1
				Reference page
	CONSULT-II
(CONSULT-II screen terms)			ECM*3
	GST*2
NATS MALFUNCTION	P1610 - P1615		1610 - 1615	EC-46
NO DTC IS DETECTED.
FURTHER TESTING	No DTC		Flashing*6	EC-62
MAY BE REQUIRED.
NO DTC IS DETECTED.
FURTHER TESTING	P0000		0000	—
MAY BE REQUIRED.
O/R CLTCH SOL/CIRC	P1760		1760	AT-177
P-N POS SW/CIRCUIT	P1706		1706	EC-540
PNP SW/CIRC	P0705		0705	AT-98
PURG VOLUME CONT/V	P0444		0444	EC-348
PURG VOLUME CONT/V	P0445		0445	EC-348
PURG VOLUME CONT/V	P1444		1444	EC-504
PW ST P SEN/CIRC	P0550		0550	EC-411
SENSOR POWER/CIRC	P1229		1229	EC-499
SFT SOL A/CIRC	P0750		0750	AT-162
SFT SOL B/CIRC	P0755		0755	AT-167
TCC SOLENOID/CIRC	P0740		0740	AT-142
TCS C/U FUNCTIION	P1211		1211	EC-478
TCS/CIRC	P1212		1212	EC-479
THERMSTAT FNCTN	P0128		0128	EC-225
TP SEN 1/CIRC	P0222		0222	EC-291
TP SEN 1/CIRC	P0223		0223	EC-291
TP SEN 2/CIRC	P0122		0122	EC-211
TP SEN 2/CIRC	P0123		0123	EC-211
TP SENSOR	P2135		2135	EC-570
TP SEN/CIRC A/T	P1705		1705	AT-172
TW CATALYST SYS-B1	P0420		0420	EC-327
V/SP SEN (A/T OUT)	P1720		1720	AT-109
VEH SPD SEN/CIR AT*5	P0720		0720	AT-109
VEH SPEED SEN/CIRC*5	P0500		0500	EC-405
VENT CONTROL VALVE	P0447		0447	EC-355
VENT CONTROL VALVE	P1446		1446	EC-460
VIAS S/V CIRC	P1800		1800	EC-545

*1: 1st trip DTC No. is the same as DTC No. *2: This number is prescribed by SAE J2012.

*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN. *4: The troubleshooting for this DTC needs CONSULT-II.

*5: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates. *6: When engine is running.

A

EC

C

D

E

F

G

H

I

J

K

L

M

Revision: 2005 March

EC-13

2005 X-Trail

	PRECAUTIONS
PRECAUTIONS	PFP:00001

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER” ABS00DCS

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. Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.

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 performed by an authorized NISSAN/INFINITI dealer.

●Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal 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.

On Board Diagnostic (OBD) System of Engine and A/T

ABS00CKO

The ECM has an on board diagnostic system. It will light up the malfunction indicator (MIL) to warn the driver of a malfunction causing emission deterioration.

CAUTION:

●Be sure to turn the ignition switch OFF and disconnect the battery ground 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 slidelocking type harness connector. For description and how to disconnect, refer to PG-44, "HARNESS 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.

Precaution

ABS00CKP

●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 connector, turn ignition switch OFF and disconnect battery ground 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 battery ground cable.

SEF289H

Revision: 2005 March

EC-14

2005 X-Trail

PRECAUTIONS

●Do not disassemble ECM.

●If battery cable is disconnected, the memory will return to the initial ECM values.

The ECM will now start to self-control at its initial values. Engine operation can vary slightly when the cable is disconnected. However, this is not an indication of a malfunction. 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 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 figure.

A

EC

C

PBIB1164E

D

E

F

G

H

PBIB1512E

		I
● When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).		J
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.
● Securely connect ECM harness connectors.		K
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.		L
● Keep engine control system harness at least 10 cm (4 in)
away from adjacent harness, to prevent engine control sys-	PBIB0090E
tem malfunctions due to receiving external noise, degraded		M
operation of ICs, etc.
● Keep engine control system parts and harness dry.
● Before replacing ECM, perform “ECM Terminals and Refer-
ence Value” inspection and make sure ECM functions prop-
erly. Refer to EC-115, "ECM Terminals and Reference Value"
.
● Handle mass air flow sensor carefully to avoid damage.
● Do not disassemble mass air flow sensor.
● Do not clean mass air flow sensor with any type of deter-
gent.
● Do not disassemble electric throttle control actuator.
● Even a slight leak in the air intake system can cause seri-	MEF040D
ous incidents.

●Do not shock or jar the camshaft position sensor (PHASE), crankshaft position sensor (POS).

Revision: 2005 March

EC-15

2005 X-Trail

PRECAUTIONS

●After performing each TROUBLE DIAGNOSIS, perform DTC Confirmation Procedure or Overall Function Check.

The DTC should not be displayed in the DTC Confirmation Procedure if the repair is completed. The Overall Function Check should be a good result if the repair is completed.

●When measuring ECM signals with a circuit tester, connect a break-out box (SST) and Y-cable adapter (SST) between the ECM and ECM harness connector.

●When measuring ECM signals with a circuit tester, never allow the two tester probes to contact.

Accidental contact of probes will cause a short circuit and damage the ECM power transistor.

●Do not use ECM ground terminals when measuring input/ output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

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

●Tighten fuel hose clamps to the specified torque.

SEF217U

SEF348N

PBIB2344E

Revision: 2005 March

EC-16

2005 X-Trail

PRECAUTIONS

●Do not depress accelerator pedal when starting.

●Immediately after starting, do not rev up engine unnecessarily.

●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 electronic 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 standingwave radio can be kept smaller.

–Be sure to ground the radio to vehicle body.

Wiring Diagrams and Trouble Diagnosis

When you read wiring diagrams, refer to the following:

●GI-14, "How to Read Wiring Diagrams"

●PG-2, "POWER SUPPLY ROUTING" for power distribution circuit When you perform trouble diagnosis, refer to the following:

●GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"

●GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"

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Revision: 2005 March

EC-17

2005 X-Trail

	PREPARATION
PREPARATION	PFP:00002
Special Service Tools	ABS00CKR

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number

(Kent-Moore No.) Description Tool name

EG17650301	Adapting radiator cap tester to radiator cap and
(J-33984-A)	radiator filler neck
Radiator cap tester	a: 28 (1.10) dia.
adapter	b: 31.4 (1.236) dia.
	c: 41.3 (1.626) dia.
	Unit: mm (in)
	S-NT564
KV10117100	Loosening or tightening heated oxygen sensors
(J-36471-A)	with 22 mm (0.87 in) hexagon nut
Heated oxygen
sensor wrench
	S-NT379
KV10114400	Loosening or tightening heated oxygen sensors
(J-38365)	a: 22 mm (0.87 in)
Heated oxygen
sensor wrench
	S-NT636
(J-44321)	Checking fuel pressure
Fuel pressure gauge
kit
	LEC642
(J-44321-6)	Connecting fuel pressure gauge to quick
Fuel pressure adapter	connector type fuel lines.
	LBIA0376E
(J-45488)	Remove fuel tube quick connectors in engine
Quick connector	room.
release
	PBIC0198E

Revision: 2005 March

EC-18

2005 X-Trail

PREPARATION

Tool number
(Kent-Moore No.)	Description
Tool name
KV109E0010	Measuring ECM signals with a circuit tester
(J-46209)
Break-out box

	S-NT825
KV109E0080	Measuring ECM signals with a circuit tester
(J-45819)
Y-cable adapter

		S-NT826
	Commercial Service Tools	ABS00CKS
	Tool name	Description
	(Kent-Moore No.)
	Leak detector	Locating the EVAP leak
	i.e.:(J-41416)

	S-NT703
EVAP service port	Applying positive pressure through EVAP service
adapter	port
i.e.:(J-41413-OBD)

	S-NT704
Fuel filler cap adapter	Checking fuel tank vacuum relief valve opening
i.e.: (J-41416)	pressure

	S-NT815
Socket wrench	Removing and installing engine coolant
	temperature sensor

S-NT705

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Revision: 2005 March

EC-19

2005 X-Trail

	PREPARATION
Tool name		Description
(Kent-Moore No.)
Oxygen sensor thread		Reconditioning the exhaust system threads
cleaner		before installing a new oxygen sensor. Use with
i.e.: (J-43897-18)		anti-seize lubricant shown below.
(J-43897-12)		a: 18 mm diameter with pitch 1.5 mm for
		Zirconia Oxygen Sensor
		b: 12 mm diameter with pitch 1.25 mm for
		Titania Oxygen Sensor
	AEM488
Anti-seize lubricant		Lubricating oxygen sensor thread cleaning tool
i.e.: (PermatexTM		when reconditioning exhaust system threads.
133AR or equivalent
meeting MIL
specification MIL-A-
907)
	S-NT779

Revision: 2005 March

EC-20

2005 X-Trail

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM

System Diagram

PFP:23710

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PBIB2361E

Revision: 2005 March

EC-21

2005 X-Trail

ENGINE CONTROL SYSTEM

	Multiport Fuel Injection (MFI) System			ABS00CKW
	INPUT/OUTPUT SIGNAL CHART
	Sensor	Input Signal to ECM	ECM	Actuator
			function
	Crankshaft position sensor (POS)	Engine speed*3
	Camshaft position sensor (PHASE)	Piston position
	Mass air flow sensor	Amount of intake air
	Engine coolant temperature sensor	Engine coolant temperature
	Throttle position sensor	Throttle position
	Accelerator pedal position sensor	Accelerator pedal position
			Fuel injec-
	Park/neutral position (PNP) switch	Gear position
			tion & mix-
				Fuel injector
	Knock sensor	Engine knocking condition	ture ratio
			control
	Power steering pressure sensor	Power steering operation
	Heated oxygen sensor 1	Density of oxygen in exhaust gas
	Heated oxygen sensor 2*1	Density of oxygen in exhaust gas
	Wheel sensor*2	Vehicle speed
	Air conditioner switch	Air conditioner operation
	Battery	Battery voltage*3

*1: This sensor is not used to control the engine system under normal conditions. *2: This signal is sent to the ECM through CAN communication line.

*3: ECM determines the start signal status by the signal of engine speed and battery voltage.

SYSTEM DESCRIPTION

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air flow sensor.

VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION

In addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below.

<Fuel increase>

●During warm-up

●When starting the engine

●During acceleration

●Hot-engine operation

●When selector lever is changed from N to D (A/T models)

●High-load, high-speed operation

<Fuel decrease>

●During deceleration

●During high engine speed operation

Revision: 2005 March

EC-22

2005 X-Trail

ENGINE CONTROL SYSTEM

MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

PBIB0121E

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst (manifold) can then better reduce CO, HC and NOx emissions. This system uses heated oxygen sensor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about heated oxygen sensor 1, refer to EC-227, "DTC P0132 HO2S1" . This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture).

This stage is referred to as the closed loop control condition.

Heated oxygen sensor 2 is located downstream of the three way catalyst (manifold). Even if the switching characteristics of heated oxygen sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal from heated oxygen sensor 2.

Open Loop Control

The open loop system condition refers to when the ECM detects any of the following conditions. Feedback control stops in order to maintain stabilized fuel combustion.

● Deceleration and acceleration

● High-load, high-speed operation

● Malfunction of heated oxygen sensor 1 or its circuit

● Insufficient activation of heated oxygen sensor 1 at low engine coolant temperature ● High engine coolant temperature

● During warm-up

● After shifting from N to D (A/T models) ● When starting the engine

MIXTURE RATIO SELF-LEARNING CONTROL

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The mixture ratio feedback control system monitors the mixture ratio signal transmitted from heated oxygen sensor 1. This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic changes during operation (i.e., fuel injector clogging) directly affect mixture ratio.

Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is then computed in terms of “injection pulse duration” to automatically compensate for the difference between the two ratios.

“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim includes short term fuel trim and long term fuel trim.

“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical value. The signal from heated oxygen sensor 1 indicates whether the mixture ratio is RICH or LEAN compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase in fuel volume if it is lean.

“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences, wear over time and changes in the usage environment.

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Revision: 2005 March

EC-23

2005 X-Trail

ENGINE CONTROL SYSTEM

FUEL INJECTION TIMING

SEF337W

Two types of systems are used.

Sequential Multiport Fuel Injection System

Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used when the engine is running.

Simultaneous Multiport Fuel Injection System

Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of the same width are simultaneously transmitted from the ECM.

The four injectors will then receive the signals two times for each engine cycle.

This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.

FUEL SHUT-OFF

Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.

	Electronic Ignition (EI) System			ABS00CKX
	INPUT/OUTPUT SIGNAL CHART
	Sensor	Input Signal to ECM	ECM func-	Actuator
			tion
	Crankshaft position sensor (POS)	Engine speed*2
	Camshaft position sensor (PHASE)	Piston position
	Mass air flow sensor	Amount of intake air
	Engine coolant temperature sensor	Engine coolant temperature
			Ignition
	Throttle position sensor	Throttle position
			timing con-	Power transistor
	Accelerator pedal position sensor	Accelerator pedal position
			trol
	Knock sensor	Engine knocking
	Park/neutral position (PNP) switch	Gear position
	Wheel sensor*1	Vehicle speed
	Battery	Battery voltage*2

*1: This signal is sent to the ECM through CAN communication line.

*2: ECM determines the start signal status by the signal of engine speed and battery voltage.

SYSTEM DESCRIPTION

Firing order: 1-3-4-2

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM.

The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) signal. Computing this information, ignition signals are transmitted to the power transistor.

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM.

●At starting

●During warm-up

●At idle

●At low battery voltage

Revision: 2005 March

EC-24

2005 X-Trail

ENGINE CONTROL SYSTEM

●During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

	Fuel Cut Control (at No Load and High Engine Speed)			ABS00CKZ
	INPUT/OUTPUT SIGNAL CHART
	Sensor	Input Signal to ECM	ECM func-	Actuator
			tion
	Park/neutral position (PNP) switch	Neutral position
	Accelerator pedal position sensor	Accelerator pedal position
	Engine coolant temperature sensor	Engine coolant temperature	Fuel cut	Fuel injector
			control
	Crankshaft position sensor (POS)	Engine speed
	Camshaft position sensor (PHASE)
	Wheel sensor*	Vehicle speed

*: This signal is sent to the ECM through CAN communication line.

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	SYSTEM DESCRIPTION
	If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine	G
	speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
	based on engine speed.
	Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.	H
	NOTE:
	This function is different from deceleration control listed under EC-22, "Multiport Fuel Injection (MFI) System"
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Revision: 2005 March

EC-25

2005 X-Trail

AIR CONDITIONING CUT CONTROL

AIR CONDITIONING CUT CONTROL

Input/Output Signal Chart

PFP:23710

ABS00DCO

	Sensor	Input Signal to ECM	ECM function	Actuator
	Air conditioner switch	Air conditioner ON signal
	Throttle position sensor	Throttle position
	Accelerator pedal position sensor	Accelerator pedal position
	Crankshaft position sensor (POS)	Engine speed*2
	Camshaft position sensor (PHASE)
			Air conditioner
				Air conditioner relay
	Engine coolant temperature sensor	Engine coolant temperature
			cut control
	Refrigerant pressure sensor	Refrigerant pressure
	Power steering pressure sensor	Power steering operation
	Wheel sensor*1	Vehicle speed
	Battery	Battery voltage*2

*1: This signal is sent to the ECM through CAN communication line.

*2: ECM determines the start signal status by the signal of engine speed and battery voltage.

SYSTEM DESCRIPTION

This system improves engine operation when the air conditioner is used.

Under the following conditions, the air conditioner is turned OFF.

●When the accelerator pedal is fully depressed.

●When cranking the engine.

●At high engine speeds.

●When the engine coolant temperature becomes excessively high.

●When operating power steering during low engine speed or low vehicle speed.

●When engine speed is excessively low.

●When refrigerant pressure is excessively low or high.

Revision: 2005 March

EC-26

2005 X-Trail

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

AUTOMATIC SPEED CONTROL DEVICE (ASCD)			PFP:18930
System Description			ABS00D04
INPUT/OUTPUT SIGNAL CHART
Sensor	Input signal to ECM	ECM function	Actuator
ASCD brake switch	Brake pedal operation
Stop lamp switch	Brake pedal operation
ASCD clutch switch (M/T models)	Clutch pedal operation
			Electric throttle control
ASCD steering switch	ASCD steering switch operation	ASCD vehicle speed control
			actuator
Park/Neutral position (PNP)	Gear position
switch
Wheel sensor*	Vehicle speed
TCM*(A/T models)	Powertrain revolution

*: This signal is sent to the ECM through CAN communication line.

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BASIC ASCD SYSTEM

Refer to Owner's Manual for ASCD operating instructions.

Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/ h (25 MPH) and 144 km/h (89 MPH).

ECM controls throttle angle of electric throttle control actuator to regulate engine speed.

Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any malfunction occurs in ASCD system, it automatically deactivates control.

NOTE:

Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

SET OPERATION

Press MAIN switch. (The CRUISE indicator in combination meter illuminates.)

When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89 MPH), press SET/COAST switch. (Then SET indicator in combination meter illuminates.)

ACCEL OPERATION

If the RESUME/ACCELERATE switch is depressed during cruise control driving, increase the vehicle speed until the switch is released or vehicle speed reaches maximum speed controlled by the system.

And then ASCD will keep the new set speed.

CANCEL OPERATION

When any of following conditions exist, cruise operation will be canceled.

●CANCEL switch is depressed

●Brake pedal is depressed

●Clutch pedal is depressed or shift position is changed to the neutral position (M/T models)

●Selector lever is changed to N, P, R position (A/T models)

●Vehicle speed decreased to 13km/h (8MPH) lower than the set speed

●VDC/TCS system is operated

When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform the driver by blinking indicator lamp.

●Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may blink slowly.

When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/ ACCELEATE switch.

●Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.

If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle speed memory will be erased.

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Revision: 2005 March

EC-27

2005 X-Trail

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

COAST OPERATION

When the SET/COAST switch is depressed during cruise control driving, decrease vehicle set speed until the switch is released. And then ASCD will keep the new set speed.

RESUME OPERATION

When the RESUME/ACCELERATE switch is depressed after cancel operation other than depressing MAIN switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must meet following conditions.

●Brake pedal is released.

●Clutch pedal is released (M/T models)

●A/T selector lever is in other than P and N positions (A/T models)

●Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)

Component Description

ABS00D05

ASCD STEERING SWITCH

Refer to EC-519 .

ASCD BRAKE SWITCH

Refer to EC-527 and EC-638 .

ASCD CLUTCH SWITCH

Refer to EC-527 .

STOP LAMP SWITCH

Refer to EC-527 , EC-550 and EC-638

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to EC-427 , EC-429 , EC-437 and EC-443 .

ASCD INDICATOR

Refer to EC-648 .

Revision: 2005 March

EC-28

2005 X-Trail

CAN COMMUNICATION

CAN COMMUNICATION	PFP:23710
System Description	ABS00DCQ

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

Refer to LAN-16, "CAN Communication Unit" , about CAN communication for detail.

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Revision: 2005 March

EC-29

2005 X-Trail

EVAPORATIVE EMISSION SYSTEM

EVAPORATIVE EMISSION SYSTEM

Description

SYSTEM DESCRIPTION

PFP:14950

ABS00CZV

PBIB2360E

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.

The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank.

The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases.

EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.

Revision: 2005 March

EC-30

2005 X-Trail