INFINITI QX56 2006 Factory Service Manual

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

INDEX FOR DTCEC-13
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Revision: November 2009 2006 QX56CTP LEARNINGP12251225 EC-483
CTP LEARNING P12261226 EC-485
CYL 1 MISFIRE P03010301 EC-327
CYL 2 MISFIRE P03020302 EC-327
CYL 3 MISFIRE P03030303 EC-327
CYL 4 MISFIRE P03040304 EC-327
CYL 5 MISFIRE P03050305 EC-327
CYL 6 MISFIRE P03060306 EC-327
CYL 7 MISFIRE P03070307 EC-327
CYL 8 MISFIRE P03080308 EC-327
D/C SOLENOID/CIRC P17621762 AT-147
D/C SOLENOID FNCTN P17641764 AT-149
ECM P06050605 EC-457
ECM BACK UP/CIRCUIT P06030603 EC-453
ECT SEN/CIRC P01170117 EC-192
ECT SEN/CIRC P01180118 EC-192
ECT SENSOR P01250125 EC-205
ENG OVER TEMP P12171217 EC-473
ETC ACTR P21192119 EC-545
ETC FUNCTION/CIRC P21012101 EC-534
ETC MOT P21182118 EC-540
ETC MOT PWR P21032103 EC-528
ETC MOT PWR P21002100 EC-528
EVAP GROSS LEAK P04550455 EC-419
EVAP PURG FLOW/MON P04410441 EC-360
EVAP SMALL LEAK P04420442 EC-365
EVAP SYS PRES SEN P04510451 EC-402
EVAP SYS PRES SEN P04520452 EC-405
EVAP SYS PRES SEN P04530453 EC-411
EVAP VERY SML LEAK P04560456 EC-427
FR/B SOLENOID/CIRC P17571757 AT-143
FR/B SOLENOID FNCT P17591759 AT-145
FTT SEN/CIRCUIT P01820182 EC-315
FTT SEN/CIRCUIT P01830183 EC-315
FTT SENSOR P01810181 EC-309
FUEL LEV SEN SLOSH P04600460 EC-436
FUEL LEVEL SENSOR P04610461 EC-438
FUEL LEVL SEN/CIRC P04620462 EC-440
FUEL LEVL SEN/CIRC P04630463 EC-440
FUEL SYS-LEAN-B1 P01710171 EC-288
FUEL SYS-LEAN-B2 P01740174 EC-288
FUEL SYS-RICH-B1 P01720172 EC-299
Items
(CONSULT-II screen terms) DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-14Revision: November 2009
INDEX FOR DTC
2006 QX56
FUEL SYS-RICH-B2P01750175 EC-299
HLR/C SOL/CIRC P17671767 AT-151
HLR/C SOL FNCTN P17691769 AT-153
HO2S2 (B1) P01370137 EC-253
HO2S2 (B1) P01380138 EC-264
HO2S2 (B1) P01390139 EC-277
HO2S2 (B2) P01570157 EC-253
HO2S2 (B2) P01580158 EC-264
HO2S2 (B2) P01590159 EC-277
HO2S2 HTR (B1) P00370037 EC-163
HO2S2 HTR (B1) P00380038 EC-163
HO2S2 HTR (B2) P00570057 EC-163
HO2S2 HTR (B2) P00580058 EC-163
I/C SOLENOID/CIRC P17521752 AT-139
I/C SOLENOID FNCTN P17541754 AT-141
IAT SEN/CIRCUIT P01120112 EC-188
IAT SEN/CIRCUIT P01130113 EC-188
IAT SENSOR P01270127 EC-208
ISC SYSTEM P05060506 EC-444
ISC SYSTEM P05070507 EC-446
KNOCK SEN/CIRC-B1 P03270327 EC-335
KNOCK SEN/CIRC-B1 P03280328 EC-335
KNOCK SEN/CIRC-B2 P03320332 EC-335
KNOCK SEN/CIRC-B2 P03330333 EC-335
L/PRESS SOL/CIRC P07450745 AT-122
LC/B SOLENOID/CIRC P17721772 AT-155
LC/B SOLENOID FNCT P17741774 AT-157
MAF SEN/CIRCUIT P01010101 EC-171
MAF SEN/CIRCUIT P01020102 EC-180
MAF SEN/CIRCUIT P01030103 EC-180
MULTI CYL MISFIRE P03000300 EC-327
NATS MALFUNCTION P1610 - P16151610 - 1615 BL-137
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000
0000 —
P-N POS SW/CIRCUIT P08500850 EC-465
PNP SW/CIRC P07050705 AT-105
PURG VOLUME CONT/V P04430443 EC-373
PURG VOLUME CONT/V P04440444 EC-381
PURG VOLUME CONT/V P04450445 EC-381
PW ST P SEN/CIRC P05500550 EC-448
SENSOR POWER/CIRC P06430643 EC-460
TCC SOLENOID/CIRC P07400740 AT- 11 8
Items
(CONSULT-II screen terms) DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

INDEX FOR DTCEC-15
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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 ICCTCM
P07000700 AT-104
TCS C/U FUNCTN P12111211 EC-471
TCS/CIRC P12121212 EC-472
THERMSTAT FNCTN P01280128 EC-211
TP SEN 1/CIRC P02220222 EC-320
TP SEN 1/CIRC P02230223 EC-320
TP SEN 2/CIRC P01220122 EC-198
TP SEN 2/CIRC P01230123 EC-198
TP SENSOR P21352135 EC-560
TURBINE REV S/CIRC P07170717 AT-109
TW CATALYST SYS-B1 P04200420 EC-354
TW CATALYST SYS-B2 P04300430 EC-354
VEH SPD SEN/CIR AT*5P07200720 AT- 111
VEH SPEED SEN/CIRC*5P05000500 EC-442
VENT CONTROL VALVE P04470447 EC-388
VENT CONTROL VALVE P04480448 EC-395
Items
(CONSULT-II screen terms) DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

EC-16Revision: November 2009
PRECAUTIONS
2006 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UBS00KZ0
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
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 per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal 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/TUBS00KZ1
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the negative battery 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 slide-
locking type harness connector. For description and how to disconnect, refer to PG-68, "
HAR-
NESS 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.
PrecautionUBS00KZ2

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 con-
nector, turn ignition switch OFF and disconnect negative
battery 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 negative battery cable.
SEF289H

PRECAUTIONSEC-17
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Revision: November 2009 2006 QX56

Do not disassemble ECM.

If a battery cable is disconnected, the memory will return to
the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is dis-
connected. However, this is not an indication of a malfunc-
tion. 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 trip 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 fig-
ure.

When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.

Keep engine control system harness at least 10 cm (4 in)
away from adjacent harness, to prevent engine control sys-
tem malfunctions due to receiving external noise, degraded
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-105, "
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-
ous incidents.

Do not shock or jar the camshaft position sensor (PHASE), crankshaft position sensor (POS).
PBIB1164E
BBIA0387E
PBIB0090E
MEF040D

EC-18Revision: November 2009
PRECAUTIONS
2006 QX56

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, 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.

B1 indicates the bank 1, B2 indicates the bank 2 as shown
in the figure.
SEF217U
SEF348N
PBIB1144E

PRECAUTIONSEC-19
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Revision: November 2009 2006 QX56

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

Tighten fuel hose clamps to the specified torque.

Do not depress accelerator pedal when starting.

Immediately after starting, do not rev up engine unneces-
sarily.

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 elec-
tronic 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 standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
BBIA0402E
SEF709Y
SEF708Y