2007 INFINITI QX56 Factory Service Manual

mileage key instrument cluster key battery winter tires hood open

Page 1089 of 3061

INFINITI QX56 2007 Factory Service Manual EC-6
DTC P0605 ECM ..............................................444
Component Description .........................................444
On Board Diagnosis Logic .....................................

EC-6
DTC P0605 ECM ..............................................444
Component Description .........................................444
On Board Diagnosis Logic .....................................444
DTC Confirmation Procedure ................................444
Diagnosis Procedure .............................................445
DTC P0643 SENSOR POWER SUPPLY ........447
On Board Diagnosis Logic .....................................447
DTC Confirmation Procedure ................................447
Wiring Diagram ......................................................448
Diagnosis Procedure .............................................449
DTC P0850 PNP SWITCH ...............................452
Component Description .........................................452
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
452
On Board Diagnosis Logic .....................................452
DTC Confirmation Procedure ................................452
Overall Function Check .........................................453
Wiring Diagram ......................................................454
Diagnosis Procedure .............................................455
DTC P1140, P1145 IVT CONTROL POSITION
SENSOR ..........................................................
457
Component Description .........................................457
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
457
On Board Diagnosis Logic .....................................457
DTC Confirmation Procedure ................................457
Wiring Diagram ......................................................458
Diagnosis Procedure .............................................461
Component Inspection ...........................................463
Removal and Installation .......................................464
DTC P1148, P1168 CLOSED LOOP CON-
TROL ................................................................
466
On Board Diagnosis Logic .....................................466
DTC P1211 TCS CONTROL UNIT ..................467
Description .............................................................467
On Board Diagnosis Logic .....................................467
DTC Confirmation Procedure ................................467
Diagnosis Procedure .............................................467
DTC P1212 TCS COMMUNICATION LINE .....468
Description .............................................................468
On Board Diagnosis Logic .....................................468
DTC Confirmation Procedure ................................468
Diagnosis Procedure .............................................468
DTC P1217 ENGINE OVER TEMPERATURE .469
Description .............................................................469
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
469
On Board Diagnosis Logic .....................................470
Overall Function Check .........................................470
Wiring Diagram ......................................................472
Diagnosis Procedure .............................................473
Main 13 Causes of Overheating ............................476
Component Inspection ...........................................476
DTC P1225 TP SENSOR ..................................477
Component Description ........................................477
On Board Diagnosis Logic ....................................477
DTC Confirmation Procedure ................................477
Diagnosis Procedure .............................................477
Removal and Installation .......................................478
DTC P1226 TP SENSOR ..................................479
Component Description ........................................479
On Board Diagnosis Logic ....................................479
DTC Confirmation Procedure ................................479
Diagnosis Procedure .............................................479
Removal and Installation .......................................480
DTC P1421 COLD START CONTROL ............481
Description ............................................................481
On Board Diagnosis Logic ....................................481
DTC Confirmation Procedure ................................481
Diagnosis Procedure .............................................481
DTC P1550 BATTERY CURRENT SENSOR ...483
Component Description ........................................483
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
483
On Board Diagnosis Logic ....................................483
DTC Confirmation Procedure ................................483
Wiring Diagram .....................................................485
Diagnosis Procedure .............................................486
Component Inspection ..........................................488
DTC P1551, P1552 BATTERY CURRENT
SENSOR ...........................................................
489
Component Description ........................................489
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
489
On Board Diagnosis Logic ....................................489
DTC Confirmation Procedure ................................489
Wiring Diagram .....................................................491
Diagnosis Procedure .............................................492
Component Inspection ..........................................494
DTC P1553 BATTERY CURRENT SENSOR ...495
Component Description ........................................495
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
495
On Board Diagnosis Logic ....................................495
DTC Confirmation Procedure ................................495
Wiring Diagram .....................................................497
Diagnosis Procedure .............................................498
Component Inspection ..........................................500
DTC P1554 BATTERY CURRENT SENSOR ...501
Component Description ........................................501
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
501
On Board Diagnosis Logic ....................................501
Overall Function Check .........................................501
Wiring Diagram .....................................................503
Diagnosis Procedure .............................................504
Component Inspection ..........................................506

Page 1090 of 3061

INFINITI QX56 2007 Factory Service Manual EC-7
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DTC P1564 ICC STEERING SWITCH .............507
Component Description .........................................507
CONSULT-II Reference Value in Data Monitor
Mode

EC-7
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DTC P1564 ICC STEERING SWITCH .............507
Component Description .........................................507
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
507
On Board Diagnosis Logic ....................................507
DTC Confirmation Procedure ................................507
Wiring Diagram .....................................................509
Diagnosis Procedure .............................................510
Component Inspection ..........................................512
DTC P1564 ASCD STEERING SWITCH .........513
Component Description .........................................513
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
513
On Board Diagnosis Logic ....................................513
DTC Confirmation Procedure ................................513
Wiring Diagram .....................................................515
Diagnosis Procedure .............................................516
Component Inspection ..........................................518
DTC P1568 ICC FUNCTION ............................519
On Board Diagnosis Logic ....................................519
DTC Confirmation Procedure ................................519
Diagnosis Procedure .............................................519
DTC P1572 ICC BRAKE SWITCH ...................520
Component Description .........................................520
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
520
On Board Diagnosis Logic ....................................520
DTC Confirmation Procedure ................................520
Wiring Diagram .....................................................522
Diagnosis Procedure .............................................523
Component Inspection ..........................................526
DTC P1572 ASCD BRAKE SWITCH ...............528
Component Description .........................................528
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
528
On Board Diagnosis Logic ....................................528
DTC Confirmation Procedure ................................528
Wiring Diagram .....................................................530
Diagnosis Procedure .............................................531
Component Inspection ..........................................534
DTC P1574 ICC VEHICLE SPEED SENSOR ..535
Component Description .........................................535
On Board Diagnosis Logic ....................................535
DTC Confirmation Procedure ................................535
Diagnosis Procedure .............................................536
DTC P1574 ASCD VEHICLE SPEED SEN-
SOR ..................................................................
537
Component Description .........................................537
On Board Diagnosis Logic ....................................537
DTC Confirmation Procedure ................................537
Diagnosis Procedure .............................................538
DTC P1805 BRAKE SWITCH ..........................539
Description ............................................................539
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
539
On Board Diagnosis Logic .....................................539
DTC Confirmation Procedure ................................539
Wiring Diagram ......................................................540
Diagnosis Procedure .............................................541
Component Inspection ...........................................542
DTC P2100, P2103 THROTTLE CONTROL
MOTOR RELAY ..............................................
543
Component Description .........................................543
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
543
On Board Diagnosis Logic .....................................543
DTC Confirmation Procedure ................................543
Wiring Diagram ......................................................545
Diagnosis Procedure .............................................546
DTC P2101 ELECTRIC THROTTLE CON-
TROL FUNCTION ...........................................
548
Description .............................................................548
On Board Diagnosis Logic .....................................548
DTC Confirmation Procedure ................................548
Wiring Diagram ......................................................549
Diagnosis Procedure .............................................550
Component Inspection ...........................................553
Removal and Installation .......................................553
DTC P2118 THROTTLE CONTROL MOTOR .554
Component Description .........................................554
On Board Diagnosis Logic .....................................554
DTC Confirmation Procedure ................................554
Wiring Diagram ......................................................555
Diagnosis Procedure .............................................556
Component Inspection ...........................................557
Removal and Installation .......................................557
DTC P2119 ELECTRIC THROTTLE CON-
TROL ACTUATOR ..........................................
559
Component Description .........................................559
On Board Diagnosis Logic .....................................559
DTC Confirmation Procedure ................................559
Diagnosis Procedure .............................................560
DTC P2122, P2123 APP SENSOR .................561
Component Description .........................................561
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
561
On Board Diagnosis Logic .....................................561
DTC Confirmation Procedure ................................561
Wiring Diagram ......................................................563
Diagnosis Procedure .............................................564
Component Inspection ...........................................566
Removal and Installation .......................................566
DTC P2127, P2128 APP SENSOR .................567
Component Description .........................................567
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
567
On Board Diagnosis Logic .....................................567

Page 1091 of 3061

INFINITI QX56 2007 Factory Service Manual EC-8
DTC Confirmation Procedure ................................567
Wiring Diagram ......................................................569
Diagnosis Procedure ....................................

EC-8
DTC Confirmation Procedure ................................567
Wiring Diagram ......................................................569
Diagnosis Procedure .............................................570
Component Inspection ...........................................572
Removal and Installation .......................................573
DTC P2135 TP SENSOR .................................574
Component Description .........................................574
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
574
On Board Diagnosis Logic .....................................574
DTC Confirmation Procedure ................................574
Wiring Diagram ......................................................576
Diagnosis Procedure .............................................577
Component Inspection ...........................................579
Removal and Installation .......................................580
DTC P2138 APP SENSOR ..............................581
Component Description .........................................581
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
581
On Board Diagnosis Logic .....................................581
DTC Confirmation Procedure ................................582
Wiring Diagram ......................................................583
Diagnosis Procedure .............................................584
Component Inspection ...........................................587
Removal and Installation .......................................587
DTC P2A00, P2A03 A/F SENSOR 1 ...............588
Component Description .........................................588
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
588
On Board Diagnosis Logic .....................................588
DTC Confirmation Procedure ................................588
Wiring Diagram ......................................................590
Diagnosis Procedure .............................................593
Removal and Installation .......................................596
ASCD BRAKE SWITCH ..................................597
Component Description .........................................597
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
597
Wiring Diagram ......................................................598
Diagnosis Procedure .............................................599
Component Inspection ...........................................602
ASCD INDICATOR ..........................................603
Component Description .........................................603
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
603
Wiring Diagram ......................................................604
Diagnosis Procedure .............................................604
ELECTRICAL LOAD SIGNAL .........................606
Description .............................................................606
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
606
Diagnosis Procedure .............................................606
FUEL INJECTOR ..............................................608
Component Description ........................................608
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
608
Wiring Diagram .....................................................609
Diagnosis Procedure .............................................610
Component Inspection ..........................................612
Removal and Installation .......................................612
FUEL PUMP .....................................................613
Description ............................................................613
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
613
Wiring Diagram .....................................................614
Diagnosis Procedure .............................................615
Component Inspection ..........................................617
Removal and Installation .......................................618
ICC BRAKE SWITCH .......................................619
Component Description ........................................619
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
619
Wiring Diagram .....................................................620
Diagnosis Procedure .............................................621
Component Inspection ..........................................624
IGNITION SIGNAL ............................................626
Component Description ........................................626
Wiring Diagram .....................................................627
Diagnosis Procedure .............................................632
Component Inspection ..........................................635
Removal and Installation .......................................637
REFRIGERANT PRESSURE SENSOR ...........638
Component Description ........................................638
Wiring Diagram .....................................................639
Diagnosis Procedure .............................................640
Removal and Installation .......................................642
MIL AND DATA LINK CONNECTOR ...............643
Wiring Diagram .....................................................643
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
645
Fuel Pressure ........................................................645
Idle Speed and Ignition Timing .............................645
Calculated Load Value ..........................................645
Mass Air Flow Sensor ...........................................645
Intake Air Temperature Sensor .............................645
Engine Coolant Temperature Sensor ...................645
A/F Sensor 1 Heater .............................................645
Heated Oxygen sensor 2 Heater ..........................645
Crankshaft Position Sensor (POS) .......................646
Camshaft Position Sensor (PHASE) .....................646
Throttle Control Motor ...........................................646
Fuel Injector ..........................................................646
Fuel Pump .............................................................646

Page 1092 of 3061

INFINITI QX56 2007 Factory Service Manual INDEX FOR DTC
EC-9
< SERVICE INFORMATION >
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SERVICE INFORMATION
INDEX FOR DTC
DTC No. IndexINFOID:0000000003531578
NOTE:
•If DTC U1000 or U1001 is displayed with other

Page 1093 of 3061

INFINITI QX56 2007 Factory Service Manual EC-10
< SERVICE INFORMATION >
INDEX FOR DTC
P0137 0137 HO2S2 (B1)EC-260
P0138 0138 HO2S2 (B1)EC-270
P0139 0139 HO2S2 (B1)EC-282
P0150 0150 A/F SENSOR1 (B2)EC-225
P0151 0151 A/F SENSOR1 (B2)EC-234
P015

Page 1094 of 3061

INFINITI QX56 2007 Factory Service Manual INDEX FOR DTC
EC-11
< SERVICE INFORMATION >
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EC
N
P OP0448 0448 VENT CONTROL VALVEEC-386
P0451 0451 EVAP SYS PRES SENEC-392
P0452 0452 EVAP SYS PRES SENEC-395
P0453 0453 EVAP SYS

Page 1095 of 3061

INFINITI QX56 2007 Factory Service Manual EC-12
< SERVICE INFORMATION >
INDEX FOR DTC
*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 numbe

Page 1096 of 3061

INFINITI QX56 2007 Factory Service Manual INDEX FOR DTC
EC-13
< SERVICE INFORMATION >
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•If DTC U1010 is displayed with other DTC, first perform the trouble diagnosis for DTC U1010. Refer to
EC-147
.
Items
(CO

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