2009 INFINITI QX56 AUX

TERMINOLOGYGI-17
< HOW TO USE THIS MANUAL >
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Exhaust gas recirculation control-BPT
valve EGRC-BPT valve
BPT valve
Exhaust gas recirculation control-solenoid
valve EGRC-solenoid valve
EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor EGRT sensorExhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memory FEEPROM
***
Flash erasable programmable read only
memory FEPROM
***
Flexible fuel sensor FFS***
Flexible fuel system FF system***
Fuel pressure regulato r*** Pressure regulator
Fuel pressure regulator control solenoid
valve ***
PRVR control solenoid valve
Fuel trim FT***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulato rIACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valve IACV-AAC valve
Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valve IACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system***
Ignition control IC***
Ignition control module ICM***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold su rface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valveAir-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection control
NEW TERM
NEW ACRONYM /
ABBREVIATION OLD TERM
Revision: December 20092009 QX56

CHASSIS AND BODY MAINTENANCEMA-25
< ON-VEHICLE MAINTENANCE >
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• To flush out the old A/T fluid from the transmission o
il coolers, pour new A/T fluid into the A/T fluid charg-
ing pipe with the engine idling and at the same time drain the old A/T fluid from the auxiliary transmis-
sion oil cooler hose return line.
• When the color of the A/T fluid coming out of the aux iliary transmission oil cooler hose return line is
about the same as the color of the new A/T fluid, flushing out the old A/T fluid is complete. The amount
of new A/T fluid used for flushing should be 30% to 50% increase of the specified capacity.
CAUTION:
• If Genuine NISSAN Matic S ATF is not available, Genuine NISSAN Matic J ATF may also be used.
• Using ATF fluid other than Genuine NISSAN Matic S ATF or Matic J ATF will cause deterioration
in driveability and A/T durability, and may damage the A/T, which is not covered by the warranty.
• When filling the transmission with A/T fluid, do not spill the A/T fluid on any heat generating
parts such as the exhaust parts.
• Do not reuse the drain plug gasket.
5. Install the A/T fluid level gauge and tighten t he A/T fluid level gauge bolt to specification.
6. Drive the vehicle to warm up the A/T fluid to approximately 80 ° C (176 ° F).
7. Check the fluid level and condition. If the A/T fluid is still dirty, repeat steps 2 through 6.
8. Install the A/T fluid level gauge in the A/T fluid charging pipe and install the A/T fluid level gauge bolt.
9. Tighten the A/T fluid level gauge bolt to specification.
Checking Transfer FluidINFOID:0000000004215545
CAUTION:
If using the vehicle for towing, the transfer fluid must be replaced as specified. Refer to MA-8, "
Intro-
duction of Periodic Maintenance".
FLUID LEAKAGE AND FLUID LEVEL
1. Make sure that fluid is not leaking from the transfer assembly or around it.
2. Check fluid level from the filler plug hole as shown.
CAUTION:
Do not start engine while checking fluid level.
3. Install the filler plug with a new gasket to the transfer. Tighten to the specified torque. Refer to DLN-142, "
Disassembly and
Assembly".
CAUTION:
Do not reuse gasket. A/T fluid grade and capacity : Refer to MA-12, "
Fluids and Lubricants".
A/T fluid level
gauge bolt : Refer to
TM-214, "
Removal and Installation (2WD)" or TM-216, "Removal and
Installation (4WD)".
LLIA0071E
A/T fluid level
gauge bolt : Refer to TM-214, "Removal and Installation (2WD)" or TM-216, "Removal and
Installation (4WD)".
SDIA3209E
Revision: December 20092009 QX56

PG-44
< COMPONENT DIAGNOSIS >
HARNESS
A3 M6 W/10 : To E10A3 M82 W/2 : Circuit breaker-2
A2 M7 B/5 : Passenger select unlock relay G4 M84 W/16 : To B101
A3 M8 W/16 : To D2 A3 M85 W/3 : Tilt motor assembly
A2 M9 BR/24 : To D1 B3 M86 W/2 : Tilt motor assembly
A3 M10 Y/4 : To E29 B3 M87 B/5 : Rear power vent window relay (open)
A3 M11 B/1 : Parking brake switch B3 M89 B/5 : Rear power vent window relay (close)
C3 M12 GR/6 : Key switch and ignition knob switch B3 M91 W/16 : To E26
D3 M13 BR/2 : Front passenger air bag OFF indicator A2 M92 B/6 : Power liftgate switch
A2 M14 GR/6 : Diode-3 D1 M93 W/24 : Display unit
B3 M15 W/4 : Steering lock solenoid A2 M95 W/6 : Rear power vent window switch
A2 M16 GR/6 : ADP steering switch A2 M96 BR/6 : Pedal adjusting switch
B2 M17 W/8 : Steering angle sensor C2 M98 W/16 : A/C and AV switch assembly
C2 M18 W/40 : BCM (body control module) C3 M99 BR/2 : Foot lamp LH
C2 M19 W/15 : BCM (body control module) F4 M100 BR/2 : Foot lamp RH
C2 M20 B/15 : BCM (body control module) E3 M104 W/4 : Aux jack
C3 M21 W/4 : NATS antenna AMP. F2 M105 Y/2 : Front passenger air bag module
C3 M22 W/16 : Data link connector F2 M106 O/2 : Front passenger air bag module
B1 M23 W/12 : Combination meter F3 M107 B/5 : Front blower relay
C1 M24 W/40 : Combination meter D5 M108 B/6 : Yaw rate/ side/ decel G sensor
F2 M25 B/4 : Remote keyless entry receiver A1 M109 BR/2 : Front tweeter LH
B2 M26 W/6 : Ignition switch D2 M110 BR/2 : Center speaker
B2 M28 W/16 : Combination switch F2 M111 BR/2 : Front tweeter RH
B2 M29 Y/6 : Combination switch (spiral cable) C2 M112 BR/14 : BOSE speaker amp.
B3 M30 GR/8 : Combination switch (spiral cable) C2 M113 BR/23 : BOSE speaker amp.
G4 M31 SMJ : To E152 A2 M116 GR/8 : Sonar system OFF switch
C3 M32 W/4 : In-vehicle sensor A2 M117 GR/8 : Rear sonar system OFF switch
B3 M33 W/32 : Automatic drive position control unit B1 M118 B/2 : Front sonar buzzer
B3 M34 W/16 : Automatic drive position control unit F2 M120 W/4 : Remote keyless entry receiver
C5 M35 Y/28 : Air bag diagnosis sensor unit F4 M122 W/4 : Variable blower control (front)
G4 M36 SMJ : To B149 C3 M123 W/2 : Tire pressure warning check connector
G3 M37 B/1 : Fuse block (J/B) D2 M139 B/2 : Diode-1
G3 M38 B/2 : Fuse block (J/B) D1 M140 B/2 : Diode-2
D3 M39 W/8 : Fuse block (J/B) C2 M141 GR/8 : 4WD shift switch
A3 M40 SMJ : To B69 E1 M142 B/6 : Mode door motor (front)
D2 M42 W/20 : AV control unit E3 M143 B/6 : Air mix door motor (passenger)
D2 M43 W/12 : AV control unit C1 M144 B/6 : Defroster door motor
D2 M44 W/32 : AV control unit E3 M146 GR/2 : Intake sensor
D3 M45 W/40 : AV control unit D3 M147B/6 : Air mix doo r motor (driver)
B1 M47 B/2 : Sonar buzzer D2 M148 W/4 : Headlamp aiming switch
D2 M49 B/26 : A/C auto amp. D3 M149 W/4 : Clock
D2 M50 L/26 : A/C auto amp. B1 M150 W/2 : Ignition keyhole illumination
B3 M51 L/4 : Trailer tow relay 1 A3 M158 W/10 : To D3
B2 M52 W/2 : Combination switch (spiral cable) Console sub-harness
D3 M53 B/3 : Front power socket LH D4 M201 W/16 : To M56
E3 M54 B/3 : Front power socket RH (for cigarette
lighter) D4 M202 BR/24 : To M64
Revision: December 20092009 QX56

TM-74
< COMPONENT DIAGNOSIS >
P1721 VEHICLE SPEED SIGNAL
P1721 VEHICLE SPEED SIGNAL
DescriptionINFOID:0000000003771921
The vehicle speed signal is transmitted from combination meter to TCM by CAN communication line. The sig-
nal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will then
use the vehicle speed signal.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000003771922
On Board Diagn osis LogicINFOID:0000000003771923
 This is not an OBD-II self-diagnostic item.
 Diagnostic trouble code “P1721” with CONSULT-III is det ected when TCM does not receive the proper vehi-
cle speed sensor signal (input by CAN co mmunication) from combination meter.
Possible CauseINFOID:0000000003771924
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000003771925
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds. ACCELE POSI: 1/8 or less
VHCL/S SE-MTR: 30 km/h (17 MPH) or more
4. If DTC is detected, go to TM-74, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003771926
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to TM-39.
NO >> GO TO 2.
2.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle and read out the value of “VHCL/S SE·MTR”.
OK or NG
Item name Condition Display value (km/h)
VHCL/S SE·MTR During driving Approximately matches the speedometer reading.
Item name Condition Displa y value (Approx.)(km/h)
VHCL/S SE·MTR During driving Approximately matches the speed-
ometer reading.
Revision: December 20092009 QX56

A/T FLUIDTM-181
< ON-VEHICLE MAINTENANCE >
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Changing the A/T Fluid (ATF)INFOID:0000000005892327
CAUTION:
If using the vehicle for towing, the A/T fl uid must be replaced as specified. Refer to MA-8, "Introduc-
tion of Periodic Maintenance".
1. Drive the vehicle to warm up the A/T fluid to approximately 80 ° C (176 ° F).
2. Stop the engine.
3. Remove the A/T fluid level gauge.
4. Drain the A/T fluid from the drai n plug hole, then install the drain
plug with a new gasket. Refill the transmission with new A/T
fluid. Always refill with the same volume as the drained A/T fluid.
Use the A/T fluid level gauge to check the A/T fluid level as
shown. Add A/T fluid as necessary.
 To flush out the old A/T fluid from the transmission o il coolers, pour new A/T fluid into the A/T fluid charg-
ing pipe with the engine idling and at the same time drain the old A/T fluid from the auxiliary transmis-
sion oil cooler hose return line.
 When the color of the A/T fluid coming out of the aux iliary transmission oil cooler hose return line is
about the same as the color of the new A/T fluid, flushing out the old A/T fluid is complete. The amount
of new A/T fluid used for flushing should be 30% to 50% increase of the specified capacity.
CAUTION:
 If Genuine NISSAN Matic S ATF is not available, Genuine NISSAN Matic J ATF may also be used.
 Using ATF fluid other than Genuine NISSAN Matic S ATF or Matic J ATF will cause deterioration
in driveability and A/T durability, and may damage the A/T, which is not covered by the warranty.
 When filling the transmission with A/T fluid, do not spill the A/T fluid on any heat generating
parts such as the exhaust parts.
 Do not reuse the drain plug gasket.
5. Install the A/T fluid level gauge and tighten t he A/T fluid level gauge bolt to specification.
6. Drive the vehicle to warm up the A/T fluid to approximately 80 ° C (176 ° F).
7. Check the fluid level and condition. If the A/T fluid is still dirty, repeat steps 2 through 6.
8. Install the A/T fluid level gauge in the A/T fluid charging pipe and install the A/T fluid level gauge bolt.
9. Tighten the A/T fluid level gauge bolt to specification. Drain plug : Refer to
TM-201, "Oil Pan"
.
LLIA0071E
A/T fluid grade and capacity : Refer to MA-12, "Fluids and Lubricants".
A/T fluid level
gauge bolt : Refer to
TM-214, "Removal and Installation (2WD)"
or TM-216, "Removal and
Installation (4WD)".
LLIA0071E
Revision: December 20092009 QX56