2006 INFINITI QX56 brake sensor

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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EC
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*

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

EC-78Revision: November 2009
BASIC SERVICE PROCEDURE
2006 QX56
Accelerator Pedal Released Position LearningUBS00KZY
DESCRIPTION
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Closed Position LearningUBS00KZZ
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF wait at least 10 seconds.Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume LearningUBS00L00
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:

Each time electric throttle control actuator or ECM is replaced.

Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

Battery voltage: More than 12.9V (At idle)

Engine coolant temperature: 70 - 100 °C (158 - 212 °F)

Park/Neutral position (PNP) switch: ON

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine
is start the headlamp will not be illuminated.

Steering wheel: Neutral (Straight-ahead position)

Vehicle speed: Stopped

Transmission: Warmed-up
–With CONSULT-II: Drive vehicle until “ATF TEMP SE 1 ” in “DATA MONITOR” mode of “A/T” system indi-
cates less than 0.9V.
–Without CONSULT-II: Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-II
1. Perform EC-78, "Accelerator Pedal Released Position Learning" .
2. Perform EC-78, "
Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

EC-90Revision: November 2009
TROUBLE DIAGNOSIS
2006 QX56
2
P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater

P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater

P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1

P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2

P0441 EVAP control system purge flow monitoring

P0443 P0444 P0445 EVAP canister purge volume control solenoid valve

P0447 P0448 EVAP canister vent control valve

P0451 P0452 P0453 EVAP control system pressure sensor

P0550 Power steering pressure sensor

P0603 ECM power supply

P0700 P0710 P0717 P0720 P0740 P0744 P0745 P1730 P1752 P1754 P1757 P1759 P1762 P1764 P1767 P1769
P1772 P1774 A/T related sensors and solenoid valves

P1217 Engine over temperature (OVERHEAT)

P1805 Brake switch

P2100 P2103 P2118 Electric throttle control actuator

P2101 Electric throttle control function
3

P0171 P0172 P0174 P0175 Fuel injection system function

P0300 - P0308 Misfire

P0420 P0430 Three way catalyst function

P0442 P0455 P0456 EVAP control system

P0506 P0507 Idle speed control system

P1148 P1168 Closed loop control

P1211 TCS control unit

P1212 TCS communication line

P1564 ICC/ASCD steering switch

P1568 ICC command value

P1572 ICC/ASCD brake switch

P1574 ICC/ASCD vehicle speed sensor

P2119 Electric throttle control actuator
Priority Detected items (DTC)