Nissan XTrail T30 2006 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
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
VIN Registration ....................................................	77
Accelerator Pedal Released Position Learning .....	77
Throttle Valve Closed Position Learning ................	78
Idle Air Volume Learning .......................................	78
Fuel Pressure Check .............................................	80
TROUBLE DIAGNOSIS ...........................................	83
Trouble Diagnosis Introduction ..............................	83
DTC Inspection Priority Chart ................................	89
Fail-Safe Chart ......................................................	91
Symptom Matrix Chart ...........................................	92
Engine Control Component Parts Location ...........	96
Vacuum Hose Drawing ........................................	101
Circuit Diagram ....................................................	102
ECM Harness Connector Terminal Layout ..........	104
ECM Terminals and Reference Value ..................	104
CONSULT-II Function (ENGINE) .........................	112
Generic Scan Tool (GST) Function ......................	125
CONSULT-II Reference Value in Data Monitor ....	127
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................	131
TROUBLE DIAGNOSIS - SPECIFICATION VALUE. 133
Description ...........................................................	133
Testing Condition .................................................	133
Inspection Procedure ...........................................	133
Diagnostic Procedure ..........................................	134
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................	143
Description ...........................................................	143
Diagnostic Procedure ..........................................	143

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POWER SUPPLY AND GROUND CIRCUIT ..........	144
Wiring Diagram ....................................................	144
Diagnostic Procedure ..........................................	145
Component Inspection .........................................	151
Ground Inspection ...............................................	151
DTC U1000, U1001 CAN COMMUNICATION LINE. 152
Description ...........................................................	152
On Board Diagnosis Logic ...................................	152
DTC Confirmation Procedure ..............................	152
Wiring Diagram ....................................................	153
Diagnostic Procedure ..........................................	154
DTC P0011 IVT CONTROL ....................................	155
Description ...........................................................	155
CONSULT-IIReferenceValueinDataMonitorMode
	. 155
On Board Diagnosis Logic ...................................	156
DTC Confirmation Procedure ..............................	156
Diagnostic Procedure ..........................................	157
Component Inspection .........................................	158
Removal and Installation .....................................	158
DTC P0031, P0032 HO2S1 HEATER ....................	159
Description ...........................................................	159
CONSULT-IIReferenceValueinDataMonitorMode
	. 159
On Board Diagnosis Logic ...................................	159
DTC Confirmation Procedure ..............................	160
Wiring Diagram ....................................................	161
Diagnostic Procedure ..........................................	163
Component Inspection .........................................	165
Removal and Installation .....................................	165
DTC P0037, P0038 HO2S2 HEATER ....................	166
Description ...........................................................	166
CONSULT-IIReferenceValueinDataMonitorMode
	. 166
On Board Diagnosis Logic ...................................	166
DTC Confirmation Procedure ..............................	167
Wiring Diagram ....................................................	168
Diagnostic Procedure ..........................................	170
Component Inspection .........................................	172
Removal and Installation .....................................	172
DTC P0075 IVT CONTROL SOLENOID VALVE ...	173
Component Description .......................................	173
CONSULT-IIReferenceValueinDataMonitorMode
	. 173
On Board Diagnosis Logic ...................................	173
DTC Confirmation Procedure ..............................	173
Wiring Diagram ....................................................	174
Diagnostic Procedure ..........................................	176
Component Inspection .........................................	177
Removal and Installation .....................................	177
DTC P0101 MAF SENSOR ....................................	178
Component Description .......................................	178
CONSULT-IIReferenceValueinDataMonitorMode
	. 178
On Board Diagnosis Logic ...................................	178
DTC Confirmation Procedure ..............................	178
Overall Function Check .......................................	180
Wiring Diagram ....................................................	181
Diagnostic Procedure ..........................................	182

Component Inspection .........................................	185
Removal and Installation ......................................	186
DTC P0102, P0103 MAF SENSOR ........................	187
Component Description .......................................	187
CONSULT-IIReferenceValueinDataMonitorMode
	.187
On Board Diagnosis Logic ...................................	187
DTC Confirmation Procedure ...............................	187
Wiring Diagram ....................................................	189
Diagnostic Procedure ...........................................	190
Component Inspection .........................................	193
Removal and Installation ......................................	194
DTC P0112, P0113 IAT SENSOR ...........................	195
Component Description .......................................	195
On Board Diagnosis Logic ...................................	195
DTC Confirmation Procedure ...............................	195
Wiring Diagram ....................................................	197
Diagnostic Procedure ...........................................	198
Component Inspection .........................................	200
Removal and Installation ......................................	200
DTC P0117, P0118 ECT SENSOR .........................	201
Component Description .......................................	201
On Board Diagnosis Logic ...................................	201
DTC Confirmation Procedure ...............................	202
Wiring Diagram ....................................................	203
Diagnostic Procedure ...........................................	204
Component Inspection .........................................	206
Removal and Installation ......................................	206
DTC P0122, P0123 TP SENSOR ...........................	207
Component Description .......................................	207
CONSULT-IIReferenceValueinDataMonitorMode
	.207
On Board Diagnosis Logic ...................................	207
DTC Confirmation Procedure ...............................	208
Wiring Diagram ....................................................	209
Diagnostic Procedure ...........................................	211
Component Inspection .........................................	214
Remove and Installation ......................................	214
DTC P0125 ECT SENSOR .....................................	215
Description ...........................................................	215
On Board Diagnosis Logic ...................................	215
DTC Confirmation Procedure ...............................	215
Diagnostic Procedure ...........................................	216
Component Inspection .........................................	217
Removal and Installation ......................................	217
DTC P0127 IAT SENSOR .......................................	218
Component Description .......................................	218
On Board Diagnosis Logic ...................................	218
DTC Confirmation Procedure ...............................	218
Diagnostic Procedure ...........................................	219
Component Inspection .........................................	220
Removal and Installation ......................................	220
DTC P0128 THERMOSTAT FUNCTION ................	221
On Board Diagnosis Logic ...................................	221
DTC Confirmation Procedure ...............................	221
Diagnostic Procedure ...........................................	221
Component Inspection .........................................	222
Removal and Installation ......................................	222
DTC P0132 HO2S1 ................................................	223

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Component Description .......................................	223
CONSULT-IIReferenceValueinDataMonitorMode
	. 223
On Board Diagnosis Logic ..................................	223
DTC Confirmation Procedure ..............................	224
Wiring Diagram ...................................................	225
Diagnostic Procedure ..........................................	227
Component Inspection ........................................	228
Removal and Installation .....................................	230
DTC P0133 HO2S1 ................................................	231
Component Description .......................................	231
CONSULT-IIReferenceValueinDataMonitorMode
	. 231
On Board Diagnosis Logic ..................................	231
DTC Confirmation Procedure ..............................	232
Overall Function Check .......................................	233
Wiring Diagram ...................................................	234
Diagnostic Procedure ..........................................	236
Component Inspection ........................................	240
Removal and Installation .....................................	241
DTC P0134 HO2S1 ................................................	242
Component Description .......................................	242
CONSULT-IIReferenceValueinDataMonitorMode
	. 242
On Board Diagnosis Logic ..................................	242
DTC Confirmation Procedure ..............................	243
Overall Function Check .......................................	244
Wiring Diagram ...................................................	245
Diagnostic Procedure ..........................................	247
Component Inspection ........................................	249
Removal and Installation .....................................	250
DTC P0137 HO2S2 ................................................	251
Component Description .......................................	251
CONSULT-IIReferenceValueinDataMonitorMode
	. 251
On Board Diagnosis Logic ..................................	251
DTC Confirmation Procedure ..............................	252
Overall Function Check .......................................	252
Wiring Diagram ...................................................	254
Diagnostic Procedure ..........................................	256
Component Inspection ........................................	258
Removal and Installation .....................................	259
DTC P0138 HO2S2 ................................................	260
Component Description .......................................	260
CONSULT-IIReferenceValueinDataMonitorMode
	. 260
On Board Diagnosis Logic ..................................	260
DTC Confirmation Procedure ..............................	261
Overall Function Check .......................................	262
Wiring Diagram ...................................................	263
Diagnostic Procedure ..........................................	265
Component Inspection ........................................	270
Removal and Installation .....................................	271
DTC P0139 HO2S2 ................................................	272
Component Description .......................................	272
CONSULT-IIReferenceValueinDataMonitorMode
	. 272
On Board Diagnosis Logic ..................................	272
DTC Confirmation Procedure ..............................	273

Overall Function Check .......................................	273
Wiring Diagram ....................................................	275
Diagnostic Procedure ..........................................	277
Component Inspection .........................................	279
Removal and Installation .....................................	280
DTCP0171FUELINJECTIONSYSTEMFUNCTION. 281
On Board Diagnosis Logic ...................................	281
DTC Confirmation Procedure ..............................	281
Wiring Diagram ....................................................	283
Diagnostic Procedure ..........................................	285
DTCP0172FUELINJECTIONSYSTEMFUNCTION. 289
On Board Diagnosis Logic ...................................	289
DTC Confirmation Procedure ..............................	289
Wiring Diagram ....................................................	291
Diagnostic Procedure ..........................................	293
DTC P0181 FTT SENSOR .....................................	296
Component Description .......................................	296
On Board Diagnosis Logic ...................................	296
DTC Confirmation Procedure ..............................	296
Wiring Diagram ....................................................	298
Diagnostic Procedure ..........................................	299
Component Inspection .........................................	301
Removal and Installation .....................................	301
DTC P0182, P0183 FTT SENSOR .........................	302
Component Description .......................................	302
On Board Diagnosis Logic ...................................	302
DTC Confirmation Procedure ..............................	302
Wiring Diagram ....................................................	303
Diagnostic Procedure ..........................................	304
Component Inspection .........................................	306
Removal and Installation .....................................	306
DTC P0222, P0223 TP SENSOR ...........................	307
Component Description .......................................	307
CONSULT-IIReferenceValueinDataMonitorMode
	. 307
On Board Diagnosis Logic ...................................	307
DTC Confirmation Procedure ..............................	308
Wiring Diagram ....................................................	309
Diagnostic Procedure ..........................................	311
Component Inspection .........................................	314
Remove and Installation ......................................	314
DTC P0300 - P0304 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 4 CYLINDER MISFIRE ....................	315
On Board Diagnosis Logic ...................................	315
DTC Confirmation Procedure ..............................	315
Diagnostic Procedure ..........................................	316
DTC P0327, P0328 KS ..........................................	322
Component Description .......................................	322
On Board Diagnosis Logic ...................................	322
DTC Confirmation Procedure ..............................	322
Wiring Diagram ....................................................	323
Diagnostic Procedure ..........................................	324
Component Inspection .........................................	326
Removal and Installation .....................................	326
DTC P0335 CKP SENSOR (POS) .........................	327
Component Description .......................................	327
CONSULT-IIReferenceValueinDataMonitorMode
	. 327
On Board Diagnosis Logic ...................................	327

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DTC Confirmation Procedure ..............................	328
Wiring Diagram ....................................................	329
Diagnostic Procedure ..........................................	331
Component Inspection .........................................	334
Removal and Installation .....................................	334
DTC P0340 CMP SENSOR (PHASE) ....................	335
Component Description .......................................	335
On Board Diagnosis Logic ...................................	335
DTC Confirmation Procedure ..............................	336
Wiring Diagram ....................................................	337
Diagnostic Procedure ..........................................	338
Component Inspection .........................................	341
Removal and Installation .....................................	342
DTC P0420 THREE WAY CATALYST FUNCTION . 343
On Board Diagnosis Logic ...................................	343
DTC Confirmation Procedure ..............................	343
Overall Function Check .......................................	344
Diagnostic Procedure ..........................................	345
DTC P0441 EVAP CONTROL SYSTEM ................	348
System Description ..............................................	348
On Board Diagnosis Logic ...................................	348
DTC Confirmation Procedure ..............................	349
Overall Function Check .......................................	349
Diagnostic Procedure ..........................................	350
DTC P0442 EVAP CONTROL SYSTEM ................	354
On Board Diagnosis Logic ...................................	354
DTC Confirmation Procedure ..............................	355
Diagnostic Procedure ..........................................	357
Component Inspection .........................................	363
DTC P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ..............................	364
Description ...........................................................	364
CONSULT-IIReferenceValueinDataMonitorMode
. 364
On Board Diagnosis Logic ...................................	365
DTC Confirmation Procedure ..............................	365
Wiring Diagram ....................................................	366
Diagnostic Procedure ..........................................	368
Component Inspection .........................................	370
Removal and Installation .....................................	371
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE .....................	372
Description ...........................................................	372
CONSULT-IIReferenceValueinDataMonitorMode
. 372
On Board Diagnosis Logic ...................................	373
DTC Confirmation Procedure ..............................	373
Wiring Diagram ....................................................	374
Diagnostic Procedure ..........................................	376
Component Inspection .........................................	377
Removal and Installation .....................................	378
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE ....................................................................	379
Component Description .......................................	379
CONSULT-IIReferenceValueinDataMonitorMode
. 379
On Board Diagnosis Logic ...................................	379
DTC Confirmation Procedure ..............................	380
Wiring Diagram ....................................................	381

Diagnostic Procedure ...........................................	382
Component Inspection .........................................	384
DTC P0448 EVAP CANISTER VENT CONTROL
VALVE .....................................................................	386
Component Description .......................................	386
CONSULT-IIReferenceValueinDataMonitorMode
.386
On Board Diagnosis Logic ...................................	386
DTC Confirmation Procedure ...............................	387
Wiring Diagram ....................................................	388
Diagnostic Procedure ...........................................	389
Component Inspection .........................................	391
DTCP0451EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	393
Component Description .......................................	393
CONSULT-IIReferenceValueinDataMonitorMode
.393
On Board Diagnosis Logic ...................................	393
DTC Confirmation Procedure ...............................	394
Diagnostic Procedure ...........................................	394
Component Inspection .........................................	395
DTCP0452EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	396
Component Description .......................................	396
CONSULT-IIReferenceValueinDataMonitorMode
.396
On Board Diagnosis Logic ...................................	396
DTC Confirmation Procedure ...............................	397
Wiring Diagram ....................................................	398
Diagnostic Procedure ...........................................	399
Component Inspection .........................................	402
DTCP0453EVAPCONTROLSYSTEMPRESSURE
SENSOR .................................................................	403
Component Description .......................................	403
CONSULT-IIReferenceValueinDataMonitorMode
.403
On Board Diagnosis Logic ...................................	403
DTC Confirmation Procedure ...............................	404
Wiring Diagram ....................................................	405
Diagnostic Procedure ...........................................	406
Component Inspection .........................................	410
DTC P0455 EVAP CONTROL SYSTEM ................	411
On Board Diagnosis Logic ...................................	411
DTC Confirmation Procedure ...............................	412
Diagnostic Procedure ...........................................	413
DTC P0456 EVAP CONTROL SYSTEM ................	419
On Board Diagnosis Logic ...................................	419
DTC Confirmation Procedure ...............................	420
Overall Function Check ........................................	421
Diagnostic Procedure ...........................................	422
Component Inspection .........................................	429
DTC P0460 FUEL LEVEL SENSOR ......................	430
Component Description .......................................	430
On Board Diagnostic Logic ..................................	430
DTC Confirmation Procedure ...............................	430
Diagnostic Procedure ...........................................	431
Removal and Installation ......................................	431
DTC P0461 FUEL LEVEL SENSOR ......................	432
Component Description .......................................	432

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EC-4

2006 X-Trail

On Board Diagnostic Logic .................................	432
Overall Function Check .......................................	432
Diagnostic Procedure ..........................................	433
Removal and Installation .....................................	433
DTC P0462, P0463 FUEL LEVEL SENSOR .........	434
Component Description .......................................	434
On Board Diagnostic Logic .................................	434
DTC Confirmation Procedure ..............................	434
Diagnostic Procedure ..........................................	435
Removal and Installation .....................................	435
DTC P0500 VSS ....................................................	436
Description ..........................................................	436
On Board Diagnosis Logic ..................................	436
DTC Confirmation Procedure ..............................	436
Overall Function Check .......................................	437
Diagnostic Procedure ..........................................	437
DTC P0506 ISC SYSTEM ......................................	438
Description ..........................................................	438
On Board Diagnosis Logic ..................................	438
DTC Confirmation Procedure ..............................	438
Diagnostic Procedure ..........................................	439
DTC P0507 ISC SYSTEM ......................................	440
Description ..........................................................	440
On Board Diagnosis Logic ..................................	440
DTC Confirmation Procedure ..............................	440
Diagnostic Procedure ..........................................	441
DTC P0550 PSP SENSOR ....................................	442
Component Description .......................................	442
CONSULT-IIReferenceValueinDataMonitorMode
	. 442
On Board Diagnosis Logic ..................................	442
DTC Confirmation Procedure ..............................	442
Wiring Diagram ...................................................	443
Diagnostic Procedure ..........................................	444
Component Inspection ........................................	446
Removal and Installation .....................................	446
DTC P0603 ECM POWER SUPPLY ......................	447
Component Description .......................................	447
On Board Diagnosis Logic ..................................	447
DTC Confirmation Procedure ..............................	447
Wiring Diagram ...................................................	448
Diagnostic Procedure ..........................................	449
DTC P0605 ECM ...................................................	451
Component Description .......................................	451
On Board Diagnosis Logic ..................................	451
DTC Confirmation Procedure ..............................	451
Diagnostic Procedure ..........................................	452
DTC P0643 SENSOR POWER SUPPLY ...............	454
On Board Diagnosis Logic ..................................	454
DTC Confirmation Procedure ..............................	454
Wiring Diagram ...................................................	455
Diagnostic Procedure ..........................................	457
DTC P0850 PNP SWITCH .....................................	460
Component Description .......................................	460
CONSULT-IIReferenceValueinDataMonitorMode
	. 460
On Board Diagnosis Logic ..................................	460
DTC Confirmation Procedure ..............................	460
Overall Function Check .......................................	461

Wiring Diagram ....................................................	462
Diagnostic Procedure ..........................................	463
DTC P1143 HO2S1 ................................................	465
Component Description .......................................	465
CONSULT-IIReferenceValueinDataMonitorMode
	. 465
On Board Diagnosis Logic ...................................	465
DTC Confirmation Procedure ..............................	466
Overall Function Check .......................................	466
Diagnostic Procedure ..........................................	467
Component Inspection .........................................	469
Removal and Installation .....................................	470
DTC P1144 HO2S1 ................................................	471
Component Description .......................................	471
CONSULT-IIReferenceValueinDataMonitorMode
	. 471
On Board Diagnosis Logic ...................................	471
DTC Confirmation Procedure ..............................	472
Overall Function Check .......................................	472
Diagnostic Procedure ..........................................	473
Component Inspection .........................................	475
Removal and Installation .....................................	476
DTC P1148 CLOSED LOOP CONTROL ...............	477
On Board Diagnosis Logic ...................................	477
DTC Confirmation Procedure ..............................	477
Overall Function Check .......................................	477
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 ..........................	491
Component Inspection .........................................	492
DTC P1225 TP SENSOR .......................................	494
Component Description .......................................	494
On Board Diagnosis Logic ...................................	494
DTC Confirmation Procedure ..............................	494
Diagnostic Procedure ..........................................	495
Remove and Installation ......................................	495
DTC P1226 TP SENSOR .......................................	496
Component Description .......................................	496
On Board Diagnosis Logic ...................................	496
DTC Confirmation Procedure ..............................	496
Diagnostic Procedure ..........................................	497
Remove and Installation ......................................	497

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DTC P1564 ASCD STEERING SWITCH ...............	498
Component Description .......................................	498
CONSULT-IIReferenceValueinDataMonitorMode
. 498
On Board Diagnosis Logic ...................................	498
DTC Confirmation Procedure ..............................	499
Wiring Diagram ....................................................	500
Diagnostic Procedure ..........................................	502
Component Inspection .........................................	505
DTC P1572 ASCD BRAKE SWITCH .....................	506
Component Description .......................................	506
CONSULT-IIReferenceValueinDataMonitorMode
. 506
On Board Diagnosis Logic ...................................	506
DTC Confirmation Procedure ..............................	507
Wiring Diagram ....................................................	508
Diagnostic Procedure ..........................................	510
Component Inspection .........................................	516
DTC P1574 ASCD VEHICLE SPEED SENSOR ....	517
Component Description .......................................	517
On Board Diagnosis Logic ...................................	517
DTC Confirmation Procedure ..............................	517
Diagnostic Procedure ..........................................	518
DTC P1720 VSS .....................................................	519
Description ...........................................................	519
CONSULT-IIReferenceValueinDataMonitorMode
. 519
On Board Diagnosis Logic ...................................	519
DTC Confirmation Procedure ..............................	519
Diagnostic Procedure ..........................................	520
DTC P1800 VIAS CONTROL SOLENOID VALVE . 521
Component Description .......................................	521
CONSULT-IIReferenceValueinDataMonitorMode
. 521
On Board Diagnosis Logic ...................................	521
DTC Confirmation Procedure ..............................	521
Wiring Diagram ....................................................	522
Diagnostic Procedure ..........................................	523
Component Inspection .........................................	524
Removal and Installation .....................................	525
DTC P1805 BRAKE SWITCH ................................	526
Description ...........................................................	526
CONSULT-IIReferenceValueinDataMonitorMode
. 526
On Board Diagnosis Logic ...................................	526
DTC Confirmation Procedure ..............................	526
Wiring Diagram ....................................................	527
Diagnostic Procedure ..........................................	528
Component Inspection .........................................	530
DTCP2100,P2103THROTTLECONTROLMOTOR
RELAY ....................................................................	531
Component Description .......................................	531
CONSULT-IIReferenceValueinDataMonitorMode
. 531
On Board Diagnosis Logic ...................................	531
DTC Confirmation Procedure ..............................	531
Wiring Diagram ....................................................	533
Diagnostic Procedure ..........................................	535
Component Inspection .........................................	537

DTC P2101 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................	538
Description ...........................................................	538
On Board Diagnosis Logic ...................................	538
DTC Confirmation Procedure ...............................	538
Wiring Diagram ....................................................	539
Diagnostic Procedure ...........................................	541
Component Inspection .........................................	545
Remove and Installation ......................................	545
DTC P2118 THROTTLE CONTROL MOTOR ........	546
Component Description .......................................	546
On Board Diagnosis Logic ...................................	546
DTC Confirmation Procedure ...............................	546
Wiring Diagram ....................................................	547
Diagnostic Procedure ...........................................	549
Component Inspection .........................................	550
Removal and Installation ......................................	550
DTC P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................	551
Component Description .......................................	551
On Board Diagnosis Logic ...................................	551
DTC Confirmation Procedure ...............................	551
Diagnostic Procedure ...........................................	552
DTC P2122, P2123 APP SENSOR ........................	553
Component Description .......................................	553
CONSULT-IIReferenceValueinDataMonitorMode
	.553
On Board Diagnosis Logic ...................................	553
DTC Confirmation Procedure ...............................	554
Wiring Diagram ....................................................	555
Diagnostic Procedure ...........................................	557
Component Inspection .........................................	559
Removal and Installation ......................................	559
DTC P2127, P2128 APP SENSOR ........................	560
Component Description .......................................	560
CONSULT-IIReferenceValueinDataMonitorMode
	.560
On Board Diagnosis Logic ...................................	560
DTC Confirmation Procedure ...............................	561
Wiring Diagram ....................................................	562
Diagnostic Procedure ...........................................	564
Component Inspection .........................................	567
Remove and Installation ......................................	567
DTC P2135 TP SENSOR .......................................	568
Component Description .......................................	568
CONSULT-IIReferenceValueinDataMonitorMode
	.568
On Board Diagnosis Logic ...................................	568
DTC Confirmation Procedure ...............................	569
Wiring Diagram ....................................................	570
Diagnostic Procedure ...........................................	572
Component Inspection .........................................	575
Remove and Installation ......................................	575
DTC P2138 APP SENSOR .....................................	576
Component Description .......................................	576
CONSULT-IIReferenceValueinDataMonitorMode
	.576
On Board Diagnosis Logic ...................................	576
DTC Confirmation Procedure ...............................	577

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EC-6

2006 X-Trail

Wiring Diagram ...................................................	578
Diagnostic Procedure ..........................................	580
Component Inspection ........................................	583
Remove and Installation ......................................	583
ASCD BRAKE SWITCH ........................................	584
Component Description .......................................	584
CONSULT-IIReferenceValueinDataMonitorMode
	. 584
Wiring Diagram ...................................................	585
Diagnostic Procedure ..........................................	587
Component Inspection ........................................	592
ASCD INDICATOR ................................................	594
Component Description .......................................	594
CONSULT-IIReferenceValueinDataMonitorMode
	. 594
Wiring Diagram ...................................................	595
Diagnostic Procedure ..........................................	597
ELECTRICAL LOAD SIGNAL ...............................	598
CONSULT-IIReferenceValueinDataMonitorMode
	. 598
Wiring Diagram ...................................................	599
Diagnostic Procedure ..........................................	600
Wiring Diagram ...................................................	605
Diagnostic Procedure ..........................................	606
Wiring Diagram ...................................................	608
Diagnostic Procedure ..........................................	609
FUEL INJECTOR ....................................................	611
Component Description .........................................	611
CONSULT-IIReferenceValueinDataMonitorMode
	..611
Wiring Diagram ...................................................	612
Diagnostic Procedure ..........................................	613
Component Inspection ........................................	616
Removal and Installation .....................................	616
FUEL PUMP ..........................................................	617
Description ..........................................................	617
CONSULT-IIReferenceValueinDataMonitorMode
	. 617
Wiring Diagram ...................................................	618
Diagnostic Procedure ..........................................	619
Component Inspection ........................................	622
Removal and Installation .....................................	622

IGNITION SIGNAL .................................................	623
Component Description .......................................	623
Wiring Diagram ....................................................	624
Diagnostic Procedure ..........................................	627
Component Inspection .........................................	632
Removal and Installation .....................................	633
REFRIGERANT PRESSURE SENSOR .................	634
Component Description .......................................	634
Wiring Diagram ....................................................	635
Diagnostic Procedure ..........................................	636
Removal and Installation .....................................	639
SNOW MODE SWITCH .........................................	640
Description ...........................................................	640
CONSULT-II Reference Value in the Data Monitor
Mode ....................................................................	640
Wiring Diagram ....................................................	641
Diagnostic Procedure ..........................................	643
Component Inspection .........................................	646
VIAS .......................................................................	647
Description ...........................................................	647
CONSULT-IIReferenceValueinDataMonitorMode
. 648
Wiring Diagram ....................................................	649
Diagnostic Procedure ..........................................	651
Component Inspection .........................................	655
Removal and Installation .....................................	656
MIL AND DATA LINK CONNECTOR .....................	657
Wiring Diagram ....................................................	657
SERVICE DATA AND SPECIFICATIONS (SDS) ...	661
Fuel Pressure ......................................................	661
Idle Speed and Ignition Timing ............................	661
Calculated Load Value .........................................	661
Mass Air Flow Sensor ..........................................	661
Intake Air Temperature Sensor ............................	661
Engine Coolant Temperature Sensor ..................	661
Heated Oxygen Sensor 1 Heater ........................	661
Heated Oxygen Sensor 2 Heater ........................	661
Crankshaft Position Sensor (POS) ......................	661
Camshaft Position Sensor (PHASE) ...................	661
Throttle Control Motor ..........................................	662
Fuel Injector .........................................................	662
Fuel Pump ...........................................................	662

A

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Revision: 2006 July

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2006 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-152, "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-152
U1001		1001*4	CAN COMM CIRCUIT	EC-152
			NO DTC IS DETECTED.
P0000		0000	FURTHER TESTING	—
			MAY BE REQUIRED.
P0011		0011	INT/V TIM CONT-B1	EC-155
P0031		0031	HO2S1 HTR (B1)	EC-159
P0032		0032	HO2S1 HTR (B1)	EC-159
P0037		0037	HO2S2 HTR (B1)	EC-166
P0038		0038	HO2S2 HTR (B1)	EC-166
P0075		0075	INT/V TIM V/CIR-B1	EC-173
P0101		0101	MAF SEN/CIRCUIT	EC-178
P0102		0102	MAF SEN/CIRCUIT	EC-187
P0103		0103	MAF SEN/CIRCUIT	EC-187
P0112		0112	IAT SEN/CIRCUIT	EC-195
P0113		0113	IAT SEN/CIRCUIT	EC-195
P0117		0117	ECT SEN/CIRC	EC-201
P0118		0118	ECT SEN/CIRC	EC-201
P0122		0122	TP SEN 2/CIRC	EC-207
P0123		0123	TP SEN 2/CIRC	EC-207
P0125		0125	ECT SENSOR	EC-215
P0127		0127	IAT SENSOR	EC-218
P0128		0128	THERMSTAT FNCTN	EC-221
P0132		0132	HO2S1 (B1)	EC-223
P0133		0133	HO2S1 (B1)	EC-231
P0134		0134	HO2S1 (B1)	EC-242
P0137		0137	HO2S2 (B1)	EC-251
P0138		0138	HO2S2 (B1)	EC-260
P0139		0139	HO2S2 (B1)	EC-272
P0171		0171	FUEL SYS-LEAN-B1	EC-281
P0172		0172	FUEL SYS-RICH-B1	EC-289
P0181		0181	FTT SENSOR	EC-296
P0182		0182	FTT SEN/CIRCUIT	EC-302
P0183		0183	FTT SEN/CIRCUIT	EC-302
P0222		0222	TP SEN 1/CIRC	EC-307
P0223		0223	TP SEN 1/CIRC	EC-307

Revision: 2006 July

EC-8

2006 X-Trail

INDEX FOR DTC

	DTC*1		Items			A
				Reference page
CONSULT-II
		ECM*3	(CONSULT-II screen terms)
GST*2
P0300		0300	MULTI CYL MISFIRE	EC-315		EC
P0301		0301	CYL 1 MISFIRE	EC-315
P0302		0302	CYL 2 MISFIRE	EC-315
						C
P0303		0303	CYL 3 MISFIRE	EC-315
P0304		0304	CYL 4 MISFIRE	EC-315
P0327		0327	KNOCK SEN/CIRC-B1	EC-322		D
P0328		0328	KNOCK SEN/CIRC-B1	EC-322
P0335		0335	CKP SEN/CIRCUIT	EC-327
						E
P0340		0340	CMP SEN/CIRC-B1	EC-335
P0420		0420	TW CATALYST SYS-B1	EC-343
P0441		0441	EVAP PURG FLOW/MON	EC-348		F
P0442		0442	EVAP SMALL LEAK	EC-354
P0443		0443	PURG VOLUME CONT/V	EC-364
P0444		0444	PURG VOLUME CONT/V	EC-372		G
P0445		0445	PURG VOLUME CONT/V	EC-372
P0447		0447	VENT CONTROL VALVE	EC-379
						H
P0448		0448	VENT CONTROL VALVE	EC-386
P0451		0451	EVAP SYS PRES SEN	EC-393
P0452		0452	EVAP SYS PRES SEN	EC-396		I
P0453		0453	EVAP SYS PRES SEN	EC-403
P0455		0455	EVAP GROSS LEAK	EC-411
						J
P0456		0456	EVAP VERY SML LEAK	EC-419
P0460		0460	FUEL LEV SEN SLOSH	EC-430
P0461		0461	FUEL LEVEL SENSOR	EC-432		K
P0462		0462	FUEL LEVL SEN/CIRC	EC-434
P0463		0463	FUEL LEVL SEN/CIRC	EC-434
						L
P0500		0500	VEH SPEED SEN/CIRC*5	EC-436
P0506		0506	ISC SYSTEM	EC-438
P0507		0507	ISC SYSTEM	EC-440		M
P0550		0550	PW ST P SEN/CIRC	EC-442
P0603		0603	ECM BACK UP/CIRC	EC-447
P0605		0605	ECM	EC-451
P0643		0643	SENSOR POWER/CIRC	EC-454
P0705		0705	PNP SW/CIRC	AT-95
P0710		0710	ATF TEMP SEN/CIRC	AT-100
P0720		0720	VEH SPD SEN/CIR AT*5	AT-105
P0725		0725	ENGINE SPEED SIG	AT-111
P0731		0731	A/T 1ST GR FNCTN	AT-115
P0732		0732	A/T 2ND GR FNCTN	AT-120
P0733		0733	A/T 3RD GR FNCTN	AT-125
P0734		0734	A/T 4TH GR FNCTN	AT-130
P0740		0740	TCC SOLENOID/CIRC	AT-137

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EC-9

2006 X-Trail

			INDEX FOR DTC
	DTC*1		Items
				Reference page
CONSULT-II
		ECM*3	(CONSULT-II screen terms)
GST*2
P0744		0744	A/T TCC S/V FNCTN	AT-142
P0745		0745	L/PRESS SOL/CIRC	AT-150
P0750		0750	SFT SOL A/CIRC	AT-156
P0755		0755	SFT SOL B/CIRC	AT-161
P0850		0850	P-N POS SW/CIRCUIT	EC-460
P1143		1143	HO2S1 (B1)	EC-465
P1144		1144	HO2S1 (B1)	EC-471
P1148		1148	CLOSED LOOP-B1	EC-477
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-494
P1226		1226	CTP LEARNING	EC-496
P1564		1564	ASCD SW	EC-498
P1572		1572	ASCD BRAKE SW	EC-506
P1574		1574	ASCD VHL SPD SEN	EC-517
P1610 - P1615		1610 - 1615	NATS MALFUNCTION	EC-46
P1705		1705	TP SEN/CIRC A/T	AT-166
P1720		1720	V/SP SEN (A/T OUT)	EC-519
P1760		1760	O/R CLTCH SOL/CIRC	AT-171
P1800		1800	VIAS S/V CIRC	EC-521
P1805		1805	BRAKE SW/CIRCUIT	EC-526
P2100		2100	ETC MOT PWR	EC-531
P2101		2101	ETC FUNCTION/CIRC	EC-538
P2103		2103	ETC MOT PWR	EC-531
P2118		2118	ETC MOT	EC-546
P2119		2119	ETC ACTR	EC-551
P2122		2122	APP SEN 1/CIRC	EC-553
P2123		2123	APP SEN 1/CIRC	EC-553
P2127		2127	APP SEN 2/CIRC	EC-560
P2128		2128	APP SEN 2/CIRC	EC-560
P2135		2135	TP SENSOR	EC-568
P2138		2138	APP SENSOR	EC-576

*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: 2006 July

EC-10

2006 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-152, "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-115
A/T 2ND GR FNCTN	P0732		0732	AT-120
A/T 3RD GR FNCTN	P0733		0733	AT-125
A/T 4TH GR FNCTN	P0734		0734	AT-130
A/T TCC S/V FNCTN	P0744		0744	AT-142
APP SEN 1/CIRC	P2122		2122	EC-553
APP SEN 1/CIRC	P2123		2123	EC-553
APP SEN 2/CIRC	P2127		2127	EC-560
APP SEN 2/CIRC	P2128		2128	EC-560
APP SENSOR	P2138		2138	EC-576
ASCD BRAKE SW	P1572		1572	EC-506
ASCD SW	P1564		1564	EC-498
ASCD VHL SPD SEN	P1574		1574	EC-517
ATF TEMP SEN/CIRC	P0710		0710	AT-100
BRAKE SW/CIRCUIT	P1805		1805	EC-526
CAN COMM CIRCUIT	U1000		1000*4	EC-152
CAN COMM CIRCUIT	U1001		1001*4	EC-152
CKP SEN/CIRCUIT	P0335		0335	EC-327
CLOSED LOOP-B1	P1148		1148	EC-477
CMP SEN/CIRC-B1	P0340		0340	EC-335
CTP LEARNING	P1225		1225	EC-494
CTP LEARNING	P1226		1226	EC-496
CYL 1 MISFIRE	P0301		0301	EC-315
CYL 2 MISFIRE	P0302		0302	EC-315
CYL 3 MISFIRE	P0303		0303	EC-315
CYL 4 MISFIRE	P0304		0304	EC-315
ECM	P0605		0605	EC-451
ECM BACK UP/CIRC	P0603		0603	EC-447
ECT SEN/CIRC	P0117		0117	EC-201
ECT SEN/CIRC	P0118		0118	EC-201
ECT SENSOR	P0125		0125	EC-215
ENG OVER TEMP	P1217		1217	EC-480
ENGINE SPEED SIG	P0725		0725	AT-111
ETC ACTR	P2119		2119	EC-551
ETC FUNCTION/CIRC	P2101		2101	EC-538
ETC MOT	P2118		2118	EC-546
ETC MOT PWR	P2103		2103	EC-531
ETC MOT PWR	P2100		2100	EC-531
EVAP GROSS LEAK	P0455		0455	EC-411

A

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D

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Revision: 2006 July

EC-11

2006 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-348
EVAP SMALL LEAK	P0442		0442	EC-354
EVAP SYS PRES SEN	P0451		0451	EC-393
EVAP SYS PRES SEN	P0452		0452	EC-396
EVAP SYS PRES SEN	P0453		0453	EC-403
EVAP VERY SML LEAK	P0456		0456	EC-419
FTT SEN/CIRCUIT	P0182		0182	EC-302
FTT SEN/CIRCUIT	P0183		0183	EC-302
FTT SENSOR	P0181		0181	EC-296
FUEL LEV SEN SLOSH	P0460		0460	EC-430
FUEL LEVEL SENSOR	P0461		0461	EC-432
FUEL LEVL SEN/CIRC	P0462		0462	EC-434
FUEL LEVL SEN/CIRC	P0463		0463	EC-434
FUEL SYS-LEAN-B1	P0171		0171	EC-281
FUEL SYS-RICH-B1	P0172		0172	EC-289
HO2S1 (B1)	P0132		0132	EC-223
HO2S1 (B1)	P0133		0133	EC-231
HO2S1 (B1)	P0134		0134	EC-242
HO2S1 (B1)	P1143		1143	EC-465
HO2S1 (B1)	P1144		1144	EC-471
HO2S1 HTR (B1)	P0031		0031	EC-159
HO2S1 HTR (B1)	P0032		0032	EC-159
HO2S2 (B1)	P0137		0137	EC-251
HO2S2 (B1)	P0138		0138	EC-260
HO2S2 (B1)	P0139		0139	EC-272
HO2S2 HTR (B1)	P0037		0037	EC-166
HO2S2 HTR (B1)	P0038		0038	EC-166
IAT SEN/CIRCUIT	P0112		0112	EC-195
IAT SEN/CIRCUIT	P0113		0113	EC-195
IAT SENSOR	P0127		0127	EC-218
INT/V TIM CONT-B1	P0011		0011	EC-155
INT/V TIM V/CIR-B1	P0075		0075	EC-173
ISC SYSTEM	P0506		0506	EC-438
ISC SYSTEM	P0507		0507	EC-440
KNOCK SEN/CIRC-B1	P0327		0327	EC-322
KNOCK SEN/CIRC-B1	P0328		0328	EC-322
L/PRESS SOL/CIRC	P0745		0745	AT-150
MAF SEN/CIRCUIT	P0101		0101	EC-178
MAF SEN/CIRCUIT	P0102		0102	EC-187
MAF SEN/CIRCUIT	P0103		0103	EC-187
MULTI CYL MISFIRE	P0300		0300	EC-315
NATS MALFUNCTION	P1610 - P1615		1610 - 1615	EC-46

Revision: 2006 July

EC-12

2006 X-Trail

INDEX FOR DTC

Items		DTC*1
				Reference page
	CONSULT-II
(CONSULT-II screen terms)			ECM*3
	GST*2
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-171
P-N POS SW/CIRCUIT	P0850		0850	EC-460
PNP SW/CIRC	P0705		0705	AT-95
PURG VOLUME CONT/V	P0444		0444	EC-372
PURG VOLUME CONT/V	P0445		0445	EC-372
PURG VOLUME CONT/V	P0443		0443	EC-364
PW ST P SEN/CIRC	P0550		0550	EC-442
SENSOR POWER/CIRC	P0643		0643	EC-454
SFT SOL A/CIRC	P0750		0750	AT-156
SFT SOL B/CIRC	P0755		0755	AT-161
TCC SOLENOID/CIRC	P0740		0740	AT-137
TCS C/U FUNCTIION	P1211		1211	EC-478
TCS/CIRC	P1212		1212	EC-479
THERMSTAT FNCTN	P0128		0128	EC-221
TP SEN 1/CIRC	P0222		0222	EC-307
TP SEN 1/CIRC	P0223		0223	EC-307
TP SEN 2/CIRC	P0122		0122	EC-207
TP SEN 2/CIRC	P0123		0123	EC-207
TP SENSOR	P2135		2135	EC-568
TP SEN/CIRC A/T	P1705		1705	AT-166
TW CATALYST SYS-B1	P0420		0420	EC-343
V/SP SEN (A/T OUT)	P1720		1720	EC-519
VEH SPD SEN/CIR AT*5	P0720		0720	AT-105
VEH SPEED SEN/CIRC*5	P0500		0500	EC-436
VENT CONTROL VALVE	P0447		0447	EC-379
VENT CONTROL VALVE	P0448		0448	EC-386
VIAS S/V CIRC	P1800		1800	EC-521

*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

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K

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M

Revision: 2006 July

EC-13

2006 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-46, "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: 2006 July

EC-14

2006 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-104, "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: 2006 July

EC-15

2006 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: 2006 July

EC-16

2006 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.

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Revision: 2006 July

EC-17

2006 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: 2006 July

EC-18

2006 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: 2006 July

EC-19

2006 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: 2006 July

EC-20

2006 X-Trail

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM

System Diagram

PFP:23710

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PBIB2361E

Revision: 2006 July

EC-21

2006 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	Vehicle speed*2
	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: 2006 July

EC-22

2006 X-Trail

ENGINE CONTROL SYSTEM

MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

PBIB2953E

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-223, "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: 2006 July

EC-23

2006 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 fuel 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	Vehicle speed*1
	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: 2006 July

EC-24

2006 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: 2006 July

EC-25

2006 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	Vehicle speed*1
	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: 2006 July

EC-26

2006 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.)

ACCELERATE 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: 2006 July

EC-27

2006 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 fully released.

●Clutch pedal is fully 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-498 .

ASCD BRAKE SWITCH

Refer to EC-506 and EC-584 .

ASCD CLUTCH SWITCH

Refer to EC-506 .

STOP LAMP SWITCH

Refer to EC-506 , EC-526 and EC-584 .

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to EC-531 , EC-538 , EC-546 and EC-551 .

ASCD INDICATOR

Refer to EC-594 .

Revision: 2006 July

EC-28

2006 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-21, "CAN Communication Unit" , about CAN communication for detail.

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Revision: 2006 July

EC-29

2006 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: 2006 July

EC-30

2006 X-Trail