brake INFINITI QX56 2006 Factory Service Manual

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Revision: November 2009 2006 QX56
Component Description .......................................
. 440
On Board Diagnosis Logic .................................. . 440
DTC Confirmation Procedure .............................. . 440
Diagnostic Procedure .......................................... . 441
Removal and Installation ..................................... . 441
DTC P0500 VSS .................................................... . 442
Description .......................................................... . 442
On Board Diagnosis Logic .................................. . 442
DTC Confirmation Procedure .............................. . 442
Overall Function Check ....................................... . 442
Diagnostic Procedure .......................................... . 443
DTC P0506 ISC SYSTEM ...................................... . 444
Description .......................................................... . 444
On Board Diagnosis Logic .................................. . 444
DTC Confirmation Procedure .............................. . 444
Diagnostic Procedure .......................................... . 445
DTC P0507 ISC SYSTEM ...................................... . 446
Description .......................................................... . 446
On Board Diagnosis Logic .................................. . 446
DTC Confirmation Procedure .............................. . 446
Diagnostic Procedure .......................................... . 447
DTC P0550 PSP SENSOR .................................... . 448
Component Description ....................................... . 448
CONSULT-II Reference Value in Data Monitor Mode . 448
On Board Diagnosis Logic .................................. . 448
DTC Confirmation Procedure .............................. . 448
Wiring Diagram ................................................... . 449
Diagnostic Procedure .......................................... . 450
Component Inspection ........................................ . 452
Removal and Installation ..................................... . 452
DTC P0603 ECM POWER SUPPLY ...................... . 453
Component Description ....................................... . 453
On Board Diagnosis Logic .................................. . 453
DTC Confirmation Procedure .............................. . 453
Wiring Diagram ................................................... . 454
Diagnostic Procedure .......................................... . 455
DTC P0605 ECM ................................................... . 457
Component Description ....................................... . 457
On Board Diagnosis Logic .................................. . 457
DTC Confirmation Procedure .............................. . 457
Diagnostic Procedure .......................................... . 458
DTC P0643 SENSOR POWER SUPPLY ............... . 460
On Board Diagnosis Logic .................................. . 460
DTC Confirmation Procedure .............................. . 460
Wiring Diagram ................................................... . 461
Diagnostic Procedure .......................................... . 463
DTC P0850 PNP SWITCH ..................................... . 465
Component Description ....................................... . 465
CONSULT-II Reference Value in Data Monitor Mode . 465
On Board Diagnosis Logic .................................. . 465
DTC Confirmation Procedure .............................. . 465
Overall Function Check ....................................... . 466
Wiring Diagram ................................................... . 467
Diagnostic Procedure .......................................... . 468
DTC P1148, P1168 CLOSED LOOP CONTROL ... . 470
On Board Diagnosis Logic .................................. . 470
DTC P1211 TCS CONTROL UNIT ........................ . 471Description ...........................................................
.471
On Board Diagnosis Logic ................................... .471
DTC Confirmation Procedure .............................. .471
Diagnostic Procedure .......................................... .471
DTC P1212 TCS COMMUNICATION LINE ........... .472
Description ........................................................... .472
On Board Diagnosis Logic ................................... .472
DTC Confirmation Procedure .............................. .472
Diagnostic Procedure .......................................... .472
DTC P1217 ENGINE OVER TEMPERATURE ....... .473
Description ........................................................... .473
CONSULT-II Reference Value in Data Monitor Mode .473
On Board Diagnosis Logic ................................... .474
Overall Function Check ....................................... .474
Wiring Diagram .................................................... .476
Diagnostic Procedure .......................................... .478
Main 12 Causes of Overheating .......................... .481
Component Inspection ......................................... .482
DTC P1225 TP SENSOR ....................................... .483
Component Description ....................................... .483
On Board Diagnosis Logic ................................... .483
DTC Confirmation Procedure .............................. .483
Diagnostic Procedure .......................................... .484
Removal and Installation ..................................... .484
DTC P1226 TP SENSOR ....................................... .485
Component Description ....................................... .485
On Board Diagnosis Logic ................................... .485
DTC Confirmation Procedure .............................. .485
Diagnostic Procedure .......................................... .486
Removal and Installation ..................................... .486
DTC P1564 ICC STEERING SWITCH ................... .487
Component Description ....................................... .487
CONSULT-II Reference Value in Data Monitor Mode .487
On Board Diagnosis Logic ................................... .487
DTC Confirmation Procedure .............................. .488
Wiring Diagram .................................................... .489
Diagnostic Procedure .......................................... .490
Component Inspection ......................................... .493
DTC P1564 ASCD STEERING SWITCH ............... .494
Component Description ....................................... .494
CONSULT-II Reference Value in Data Monitor Mode .494
On Board Diagnosis Logic ................................... .494
DTC Confirmation Procedure .............................. .495
Wiring Diagram .................................................... .496
Diagnostic Procedure .......................................... .497
Component Inspection ......................................... .500
DTC P1568 ICC FUNCTION .................................. .501
On Board Diagnosis Logic ................................... .501
DTC Confirmation Procedure .............................. .501
Diagnostic Procedure .......................................... .501
DTC P1572 ICC BRAKE SWITCH ......................... .502
Component Description ....................................... .502
CONSULT-II Reference Value in Data Monitor Mode .502
On Board Diagnosis Logic ................................... .502
DTC Confirmation Procedure .............................. .503

EC-6Revision: November 20092006 QX56
Wiring Diagram ....................................................
.504
Diagnostic Procedure .......................................... .505
Component Inspection ......................................... .509
DTC P1572 ASCD BRAKE SWITCH ..................... .511
Component Description ....................................... .511
CONSULT-II Reference Value in Data Monitor Mode .511
On Board Diagnosis Logic ................................... .511
DTC confirmation Procedure ............................... .512
Wiring Diagram .................................................... .513
Diagnostic Procedure .......................................... .514
Component Inspection ......................................... .518
DTC P1574 ICC VEHICLE SPEED SENSOR ........ .519
Component Description ....................................... .519
On Board Diagnosis Logic ................................... .519
DTC Confirmation Procedure .............................. .519
Diagnostic Procedure .......................................... .520
DTC P1574 ASCD VEHICLE SPEED SENSOR .... .521
Component Description ....................................... .521
On Board Diagnosis Logic ................................... .521
DTC Confirmation Procedure .............................. .521
Diagnostic Procedure .......................................... .522
DTC P1805 BRAKE SWITCH ................................ .523
Description ........................................................... .523
CONSULT-II Reference Value in Data Monitor Mode .523
On Board Diagnosis Logic ................................... .523
DTC Confirmation Procedure .............................. .523
Wiring Diagram .................................................... .524
Diagnostic Procedure .......................................... .525
Component Inspection ......................................... .527
DTC P2100, P2103 THROTTLE CONTROL MOTOR
RELAY .................................................................... .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
Diagnostic Procedure .......................................... .531
DTC P2101 ELECTRIC THROTTLE CONTROL
FUNCTION ............................................................. .534
Description ........................................................... .534
On Board Diagnosis Logic ................................... .534
DTC Confirmation Procedure .............................. .534
Wiring Diagram .................................................... .535
Diagnostic Procedure .......................................... .536
Component Inspection ......................................... .539
Removal and Installation ..................................... .539
DTC P2118 THROTTLE CONTROL MOTOR ........ .540
Component Description ....................................... .540
On Board Diagnosis Logic ................................... .540
DTC Confirmation Procedure .............................. .540
Wiring Diagram .................................................... .541
Diagnostic Procedure .......................................... .542
Component Inspection ......................................... .543
Removal and Installation ..................................... .544
DTC P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ .545Component Description .......................................
.545
On Board Diagnosis Logic ................................... .545
DTC Confirmation Procedure ............................... .545
Diagnostic Procedure ........................................... .546
DTC P2122, P2123 APP SENSOR ........................ .547
Component Description ....................................... .547
CONSULT-II Reference Value in Data Monitor Mode .547
On Board Diagnosis Logic ................................... .547
DTC Confirmation Procedure ............................... .548
Wiring Diagram .................................................... .549
Diagnostic Procedure ........................................... .550
Component Inspection ......................................... .552
Removal and Installation ...................................... .552
DTC P2127, P2128 APP SENSOR ........................ .553
Component Description ....................................... .553
CONSULT-II Reference Value in Data Monitor Mode .553
On Board Diagnosis Logic ................................... .553
DTC Confirmation Procedure ............................... .554
Wiring Diagram .................................................... .555
Diagnostic Procedure ........................................... .556
Component Inspection ......................................... .559
Removal and Installation ...................................... .559
DTC P2135 TP SENSOR ....................................... .560
Component Description ....................................... .560
CONSULT-II Reference Value in Data Monitor Mode .560
On Board Diagnosis Logic ................................... .560
DTC Confirmation Procedure ............................... .561
Wiring Diagram .................................................... .562
Diagnostic Procedure ........................................... .563
Component Inspection ......................................... .566
Removal and Installation ...................................... .566
DTC P2138 APP SENSOR ..................................... .567
Component Description ....................................... .567
CONSULT-II Reference Value in Data Monitor Mode .567
On Board Diagnosis Logic ................................... .567
DTC Confirmation Procedure ............................... .568
Wiring Diagram .................................................... .569
Diagnostic Procedure ........................................... .570
Component Inspection ......................................... .574
Removal and Installation ...................................... .574
DTC P2A00, P2A03 A/F SENSOR 1 ...................... .575
Component Description ....................................... .575
CONSULT-II Reference Value in Data Monitor Mode .575
On Board Diagnosis Logic ................................... .575
DTC Confirmation Procedure ............................... .575
Wiring Diagram .................................................... .577
Diagnostic Procedure ........................................... .580
Removal and Installation ...................................... .585
ASCD BRAKE SWITCH ......................................... .586
Component Description ....................................... .586
CONSULT-II Reference Value in Data Monitor Mode .586
Wiring Diagram .................................................... .587

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Revision: November 2009 2006 QX56
Diagnostic Procedure ..........................................
. 588
Component Inspection ........................................ . 592
ASCD INDICATOR ................................................ . 593
Component Description ....................................... . 593
CONSULT-II Reference Value in Data Monitor Mode . 593
Wiring Diagram ................................................... . 594
Diagnostic Procedure .......................................... . 595
ELECTRICAL LOAD SIGNAL ............................... . 596
Description .......................................................... . 596
CONSULT-II Reference Value in Data Monitor Mode . 596
Diagnostic Procedure .......................................... . 596
FUEL INJECTOR ................................................... . 598
Component Description ....................................... . 598
CONSULT-II Reference Value in Data Monitor Mode . 598
Wiring Diagram ................................................... . 599
Diagnostic Procedure .......................................... . 600
Component Inspection ........................................ . 603
Removal and Installation ..................................... . 603
FUEL PUMP .......................................................... . 604
Description .......................................................... . 604
CONSULT-II Reference Value in Data Monitor Mode . 604
Wiring Diagram ................................................... . 605
Diagnostic Procedure .......................................... . 606
Component Inspection ........................................ . 609
Removal and Installation ..................................... . 609
ICC BRAKE SWITCH ............................................ . 610
Component Description ....................................... . 610
CONSULT-II Reference Value in Data Monitor Mode .610
Wiring Diagram .................................................... .611
Diagnostic Procedure .......................................... .612
Component Inspection ......................................... .617
IGNITION SIGNAL ................................................. .618
Component Description ....................................... .618
Wiring Diagram .................................................... .619
Diagnostic Procedure .......................................... .624
Component Inspection ......................................... .628
Removal and Installation ..................................... .629
REFRIGERANT PRESSURE SENSOR ................. .630
Component Description ....................................... .630
Wiring Diagram .................................................... .631
Diagnostic Procedure .......................................... .632
Removal and Installation ..................................... .634
MIL AND DATA LINK CONNECTOR ..................... .635
Wiring Diagram .................................................... .635
SERVICE DATA AND SPECIFICATIONS (SDS) ... .637
Fuel Pressure ...................................................... .637
Idle Speed and Ignition Timing ............................ .637
Calculated Load Value ......................................... .637
Mass Air Flow Sensor .......................................... .637
Intake Air Temperature Sensor ............................ .637
Engine Coolant Temperature Sensor .................. .637
A/F Sensor 1 Heater ............................................ .637
Heated Oxygen sensor 2 Heater ......................... .637
Crankshaft Position Sensor (POS) ...................... .637
Camshaft Position Sensor (PHASE) ................... .637
Throttle Control Motor .......................................... .637
Fuel Injector ......................................................... .638
Fuel Pump ........................................................... .638

EC-10Revision: November 2009
INDEX FOR DTC
2006 QX56
P04600460 FUEL LEV SEN SLOSH EC-436
P04610461 FUEL LEVEL SENSOR EC-438
P04620462 FUEL LEVL SEN/CIRC EC-440
P04630463 FUEL LEVL SEN/CIRC EC-440
P05000500
VEH SPEED SEN/CIRC*5EC-442
P0506 0506 ISC SYSTEM EC-444
P05070507 ISC SYSTEM EC-446
P05500550 PW ST P SEN/CIRC EC-448
P06030603 ECM BACK UP/CIRCUIT EC-453
P06050605 ECM EC-457
P06430643 SENSOR POWER/CIRC EC-460
P07000700 TCM AT-104
P07050705 PNP SW/CIRC AT-105
P07100710 ATF TEMP SEN/CIRC AT-127
P07170717 TURBINE REV S/CIRC AT-109
P07200720
VEH SPD SEN/CIR AT*5AT- 111
P0740 0740 TCC SOLENOID/CIRC AT- 11 8
P07440744 A/T TCC S/V FNCTN AT-120
P07450745 L/PRESS SOL/CIRC AT-122
P08500850 P-N POS SW/CIRCUIT EC-465
P11481148 CLOSED LOOP-B1 EC-470
P11681168 CLOSED LOOP-B2 EC-470
P12111211 TCS C/U FUNCTN EC-471
P12121212 TCS/CIRC EC-472
P12171217 ENG OVER TEMP EC-473
P12251225 CTP LEARNING EC-483
P12261226 CTP LEARNING EC-485
P15641564 ASCD SW EC-487 (Models with ICC)
EC-494
(Models with ASCD)
P1568 1568
ACC COMMAND VALUE*
7EC-501
P1572 1572 ASCD BRAKE SW EC-502 (Models with ICC)
EC-511
(Models with ASCD)
P1574 1574
ASCD VHL SPD SEN*
6EC-519 (Models with ICC)
EC-521
(Models with ASCD)
P1610 - P1615 1610 - 1615 NATS MALFUNCTION BL-137
P17301730 A/T INTERLOCK AT-134
P17521752 I/C SOLENOID/CIRC AT-139
P17541754 I/C SOLENOID FNCTN AT-141
P17571757 FR/B SOLENOID/CIRC AT-143
P17591759 FR/B SOLENOID FNCT AT-145
P17621762 D/C SOLENOID/CIRC AT-147
P17641764 D/C SOLENOID FNCTN AT-149
P17671767 HLR/C SOL/CIRC AT-151
DTC*1
Items
(CONSULT-II screen terms) Reference page
CONSULT-II
GST*
2ECM*3

INDEX FOR DTCEC-11
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Revision: November 2009 2006 QX56
*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: 2WD models
*7: Models with ICCP1769
1769 HLR/C SOL FNCTN AT- 1 5 3
P17721772 LC/B SOLENOID/CIRC AT- 1 5 5
P17741774 LC/B SOLENOID FNCT AT- 1 5 7
P18051805 BRAKE SW/CIRCUIT EC-523
P21002100 ETC MOT PWR EC-528
P21012101 ETC FUNCTION/CIRC EC-534
P21032103 ETC MOT PWR EC-528
P21182118 ETC MOT EC-540
P21192119 ETC ACTR EC-545
P21222122 APP SEN 1/CIRC EC-547
P21232123 APP SEN 1/CIRC EC-547
P21272127 APP SEN 2/CIRC EC-553
P21282128 APP SEN 2/CIRC EC-553
P21352135 TP SENSOR EC-560
P21382138 APP SENSOR EC-567
P2A002A00 A/F SENSOR1 (B1) EC-575
P2A032A03 A/F SENSOR1 (B2) EC-575
DTC*1
Items
(CONSULT-II screen terms) Reference page
CONSULT-II
GST*
2ECM*3

EC-12Revision: November 2009
INDEX FOR DTC
2006 QX56
Alphabetical IndexUBS00KYZ
NOTE:

If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-151, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC U1010 is displayed with other DTC, first perform the trouble diagnosis for DTC U1010. Refer
to EC-154, "
DTC U1010 CAN COMMUNICATION" .
Items
(CONSULT-II screen terms) DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3
A/F SENSOR1 (B1) P01300130 EC-213
A/F SENSOR1 (B1) P01310131 EC-223
A/F SENSOR1 (B1) P01320132 EC-232
A/F SENSOR1 (B1) P01330133 EC-241
A/F SENSOR1 (B1) P2A002A00 EC-575
A/F SENSOR1 (B2) P01500150 EC-213
A/F SENSOR1 (B2) P01510151 EC-223
A/F SENSOR1 (B2) P01520152 EC-232
A/F SENSOR1 (B2) P01530153 EC-241
A/F SENSOR1 (B2) P2A032A03 EC-575
A/F SEN1 HTR (B1) P00310031 EC-156
A/F SEN1 HTR (B1) P00320032 EC-156
A/F SEN1 HTR (B2) P00510051 EC-156
A/F SEN1 HTR (B2) P00520052 EC-156
A/T INTERLOCK P17301730 AT-134
A/T TCC S/V FNCTN P07440744 AT-120
ACC COMMAND VALUE*7P15681568 EC-501
APP SEN 1/CIRC P21222122 EC-547
APP SEN 1/CIRC P21232123 EC-547
APP SEN 2/CIRC P21272127 EC-553
APP SEN 2/CIRC P21282128 EC-553
APP SENSOR P21382138 EC-567
ASCD BRAKE SW P15721572EC-502 (Models with ICC)
EC-511
(Models with ASCD)
ASCD SW P15641564EC-487
(Models with ICC)
EC-494
(Models with ASCD)
ASCD VHL SPD SEN*
6P1574 1574EC-519 (Models with ICC)
EC-521
(Models with ASCD)
ATF TEMP SEN/CIRC P0710 0710 AT-127
BRAKE SW/CIRCUITP18051805 EC-523
CAN COMM CIRCUIT U1000
1000*4EC-151
CAN COMM CIRCUIT U1001
1001*4EC-151
CKP SEN/CIRCUIT P03350335 EC-340
CLOSED LOOP-B1 P11481148 EC-470
CLOSED LOOP-B2 P11681168 EC-470
CMP SEN/CIRC-B1 P03400340 EC-347
CONTROL UNIT(CAN) U10101010 EC-154

AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-29
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Revision: November 2009 2006 QX56
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionUBS00KZC
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
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 pressed 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 pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Selector lever is changed to N, P, R position

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

VDC 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/
ACCELERATE 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.
Sensor Input signal to ECM ECM functionActuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator
Stop lamp switch
Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switch Gear position
Wheel sensor Vehicle speed*
TCM Powertrain revolution*

EC-30Revision: November 2009
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
2006 QX56
COAST OPERATION
When the SET/COAST switch is pressed 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 pressed after cancel operation other than pressing MAIN switch
is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must
meet following conditions.

Brake pedal is released

A/T selector lever is in other than P and N positions

Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)
Component DescriptionUBS00KZD
ASCD STEERING SWITCH
Refer to EC-494 .
ASCD BRAKE SWITCH
Refer to EC-511 , and EC-586 .
STOP LAMP SWITCH
Refer to EC-511 , EC-523 and EC-586 .
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EC-528 , EC-534 , EC-540 and EC-545 .
ASCD INDICATOR
Refer to EC-593 .

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-51
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Revision: November 2009 2006 QX56EVAP VERY SML LEAKP0456 0456
×*4× 2×EC-427
FUEL LEV SEN SLOSH P0460 0460——2×EC-436
FUEL LEVEL SENSOR P0461 0461——2×EC-438
FUEL LEVL SEN/CIRC P0462 0462——2×EC-440
FUEL LEVL SEN/CIRC P0463 0463——2×EC-440
VEH SPEED SEN/CIRC*6P0500 0500 ——2×EC-442
ISC SYSTEM P0506 0506——2×EC-444
ISC SYSTEM P0507 0507——2×EC-446
PW ST P SEN/CIRC P0550 0550——2—EC-448
ECM BACK UP/CIRC P0603 0603——2×EC-453
ECM P0605 0605——1 or 2× or — EC-457
SENSOR POWER/CIRC P0643 0643——1×EC-460
TCM P0700 0700——1×AT- 1 0 4
PNP SW/CIRC P0705 0705——2×AT- 1 0 5
ATF TEMP SEN/CIRC P0710 0710——2×AT- 1 2 7
TURBINE REV S/CIRC P0717 0717——2×AT- 1 0 9
VHCL SPD SEN/CIR AT*6P0720 0720 ——2×AT- 11 8
TCC SOLENOID/CIRC P0740 0740——2×AT- 11 8
A/T TCC S/U FNCTN P0744 0744——2×AT- 1 2 0
L/PRESS SOL/CIRC P0745 0745——2×AT- 1 2 2
P-N POS SW/CIRCUIT P0850 0850——2×EC-465
CLOSED LOOP-B1 P1148 1148——1×EC-470
CLOSED LOOP-B2 P1168 1168——1×EC-470
TCS C/U FUNCTN P1211 1211——2—EC-471
TCS/CIRC P1212 1212——2—EC-472
ENG OVER TEMP P1217 1217——1×EC-473
CTP LEARNING P1225 1225——2—EC-483
CTP LEARNING P1226 1226——2—EC-485
ASCD SW P1564 1564——1—EC-487

(Models
with ICC) EC-494

(Models with
ASCD)
ACC COMMAND VALUE*
9P1568 1568 ——1—EC-501
ASCD BRAKE SW P1572 1572——1—EC-502

(Models
with ICC) EC-511

(Models with
ASCD)
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3

EC-52Revision: November 2009
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2006 QX56
*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: SRT code will not be set if the self-diagnostic result is NG.
*5: The troubleshooting for this DTC needs CONSULT-II.
*6: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
*7: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to EC-57, "
How to Display SRT Status" .
*8: 2WD models
*9: Models with ICC
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
ASCD VHL SPD SEN*8P1574 1574 ——1—EC-519

(Models
with ICC)
EC-521

(Models with
ASCD)
NATS MALFUNCTION P1610 -
P1615 1610 - 1615
—— 2—BL-137
A/T INTERLOCK P1730 1730——1×AT-134
I/C SOLENOID/CIRC P1752 1752——1×AT-139
I/C SOLENOID FNCTN P1754 1754——1×AT-141
FR/B SOLENOID/CIRC P1757 1757——1×AT-143
FR/B SOLENOID FNCT P1759 1759——1×AT-145
D/C SOLENOID/CIRC P1762 1762——1×AT-147
D/C SOLENOID FNCTN P1764 1764——1×AT-149
HLR/C SOL/CIRC P1767 1767——1×AT-151
HLR/C SOL FNCTN P1769 1769——1×AT-153
LC/B SOLENOID/CIRC P1772 1772——1×AT-155
LC/B SOLENOID FNCT P1774 1774——1×AT-157
BRAKE SW/CIRCUIT P1805 1805——2—EC-523
ETC MOT PWR P2100 2100——1×EC-528
ETC FUNCTION/CIRC P2101 2101——1×EC-534
ETC MOT PWR P2103 2103——1×EC-528
ETC MOT P2118 2118——1×EC-540
ETC ACTR P2119 2119——1×EC-545
APP SEN 1/CIRC P2122 2122——1×EC-547
APP SEN 1/CIRC P2123 2123——1×EC-547
APP SEN 2/CIRC P2127 2127——1×EC-553
APP SEN 2/CIRC P2128 2128——1×EC-553
TP SENSOR P2135 2135——1×EC-560
APP SENSOR P2138 2138——1×EC-567
A/F SENSOR1 (B1) P2A00 2A00—×2 ×EC-575
A/F SENSOR1 (B2) P2A03 2A03—×2 ×EC-575
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3