2011 INFINITI QX56 service

TM-6
< PRECAUTION >[7AT: RE7R01B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006226734
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
General PrecautionsINFOID:0000000006226735
Turn ignition switch OFF an d disconnect the battery cable
from the negative terminal before connecting or disconnect-
ing the A/T assembly connector. Because battery voltage is
applied to TCM even if igniti on switch is turned OFF.
 Perform “DTC (Diagnostic Trouble Code) CONFIRMATION
PROCEDURE” after performing each TROUBLE DIAGNOSIS.
If the repair is completed DTC should not be displayed in the
“DTC CONFIRMATION PROCEDURE”.
 Always use the specified brand of ATF. Refer to MA-10, "
Fluids
and Lubricants".
 Use lint-free paper not cloth rags during work.
 Dispose of the waste oil using the methods prescribed by law, ordi-
nance, etc. after replacing the ATF.
 Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
SEF289H
SEF217U
Revision: 2010 May2011 QX56

PRECAUTIONSTM-7
< PRECAUTION > [7AT: RE7R01B]
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 Disassembly should be done in a clean work area.
 Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
 Place disassembled parts in order for easier and proper assembly.
 All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
 Gaskets, seals and O-rings should be repl aced any time the A/T is disassembled.
 It is very important to perform func tional tests whenever they are indicated.
 The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
 Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
 Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in place during assembly. Never use grease.
 Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
 When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing” when changing ATF. Refer to TM-94, "
Changing".
 Occasionally, the parking gear may be locked with the to rque insufficiently released, when stopping the vehi-
cle by shifting the selector lever from “D” or “R” to “P” position with the brake pedal depressed.
In this case, the shock with a thud caused by the abrupt release of torque may occur when shifting the selec-
tor lever from “P” posit ion to other positions.
However, this symptom is not a malfunction which results in the damage of parts.
Service Notice or PrecautionINFOID:0000000006274263
ATF COOLER SERVICE
If ATF contains frictional material (clutches, bands, etc. ), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiat or or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to TM-97,
"Cleaning". For radiator replacement, refer to CO-13, "Exploded View".
Revision: 2010 May2011 QX56

TM-8
< PREPARATION >[7AT: RE7R01B]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000006226736
Tool number
(Kent-Moore No.)
Tool nameDescription
ST33400001
(J-26082)
Drift
a: 60 mm (2.36 in) dia.
b: 47 mm (1.85 in) dia.  Installing rear oil seal (2WD)
 Installing oil pump housing oil seal
KV31102400
(J-34285 and J-34285-87)
Clutch spring compressor
a: 320 mm (12.60 in)
b: 174 mm (6.85 in)  Installing reverse brake
return spring retainer
 Removing and installing 2346 brake spring retain- er
KV31103800
Clutch spring compressor
1. M12 ×1.75P Removing and installing front brake spring retainer
ST25850000
(J-25721-A)
Sliding hammer
a: 179 mm (7.05 in)
b: 70 mm (2.76 in)
c: 40 mm (1.57 in)
d: M12X1.75P Remove oil pump assembly
NT086
NT423
JSDIA1749ZZ
NT422
Revision: 2010 May2011 QX56

PREPARATIONTM-9
< PREPARATION > [7AT: RE7R01B]
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Commercial Service ToolINFOID:0000000006226737
*: Always check with the Parts Department for the latest parts information. Tool name
Description
Power tool Loosening bolts and nuts
Drift
a: 22 mm (0.87 in) dia. Installing manual shaft oil seals
Drift
a: 64 mm (2.52 in) dia. Installing rear oil seal (4WD)
Pin punch
a: 4 mm (0.16 in) dia. Remove retaining pin
1. 315268E000* O-ring
2. 310811EA5A*
Charging pipe A/T fluid changing and adjustment
PBIC0190E
NT083
SCIA5338E
NT410
JSDIA1332ZZ
Revision: 2010 May2011 QX56

TM-68
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
ECU DIAGNOSIS INFORMATION
TCM
Reference ValueINFOID:0000000006226782
VALUES ON DIAGNOSIS TOOL
NOTE:
1. The CONSULT-III electrically displays shift timi
ng and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timi ng and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sens ors, etc.) may be malfunctioning. Check mechanical
parts in accordance with the specified diagnostic procedures.
2. Shift schedule (that implies gear position) on CONSULT-III may slightly differ from that is described in Ser-
vice Manual. This occurs because of the reasons as per the following:
- Actual shift schedule has more or less tolerance or allowance
- Shift schedule in Service Manual refers to the point where shifting starts
- Gear position on CONSULT-III indicates the point where shifting completes
3. Display of solenoid valves on CONSULT-III changes at t he start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).
CONSULT-III MONITOR ITEM
Item name Condition Value / Status (Approx.)
VHCL/S SE-A/T During driving Approximately equals the speed-
ometer reading.
ESTM VSP SIG During driving Approximately equals the speed-
ometer reading.
OUTPUT REV During driving (lock-up ON) Tachometer / Gear ratio
INPUT SPEED During driving (lock-up ON) Approximately equals the engine
speed.
F SUN GR REV During driving Revolution of front sun gear is indi-
cated.
F CARR GR REV During driving Revolution of front carrier is indi-
cated.
ENGINE SPEED Eng ine running Closely equals the tachometer
reading.
TC SLIP SPEED During driving Engine speed − Input speed
ACCELE POSI Accelerator pedal is released 0.0/8
Accelerator pedal is fully depressed 8.0/8
THROTTLE POSI Accelerator pedal is released 0.0/8
Accelerator pedal is fully depressed 8.0/8
ATF TEMP 1 Ignition switch ON Temperature of ATF in the oil pan is
indicated.
ATF TEMP 2 Ignition switch ON Temperature of ATF at the exit of
torque converter.
AT F T E M P S E 1 0 °C (32 ° F) – 20 °C (68 °F) – 80 °C (176 °F) 3.3 – 2.7 – 0.9 V
BATTERY VOLT Ignition switch ON Battery voltage (11 V – 14 V)
LINE PRES SOL During driving 0.2 – 0.6 A
TCC SOLENOID Slip lock-up is active 0.2 – 0.8 A
Lock-up is active 0.8 A
Other than the above 0 A
L/B SOLENOID Low brake is engaged 0.6 – 0.8 A
Low brake is disengaged 0 – 0.05 A
Revision: 2010 May2011 QX56

TM-88
< BASIC INSPECTION >[7AT: RE7R01B]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Diagnosis FlowINFOID:0000000006226789
1.OBTAIN INFORMATION ABOUT SYMPTOM
1. Refer to TM-89, "
Question sheet" and interview the customer to obtai n the malfunction information (condi-
tions and environment when the malfunction occurred) as much as possible when the customer brings in
the vehicle.
2. Check the following:
- Service history
- Harnesses and connectors malfunction. Refer to GI-40, "
Intermittent Incident".
>> GO TO 2.
2.CHECK DTC
1. Before checking the malfunction, check whether any DTC exists.
2. If DTC exists, perform the following operations.
- Record the DTC and freeze frame data. (Print out t he data using CONSULT-III and affix them to the Work
Order Sheet.)
- Erase DTCs.
- Check the relationship between the cause that is clarified with DTC and the malfunction information
described by the customer. TM-165, "
Symptom Table" is effective.
3. Check the information of related service bulletins and others also.
Do malfunction information and DTC exist?
Malfunction information and DTC exists. >>GO TO 3.
Malfunction information exists, but no DTC. >>GO TO 4.
No malfunction information, but DTC exists. >>GO TO 5.
3.REPRODUCE MALFUNCTION SYMPTOM
Check any malfunction described by a custom er, except those with DTC on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to TM-74, "
Fail-Safe".
When a malfunction symptom is reproduced, t he question sheet is effective. Refer to TM-89, "
Question sheet".
Verify the relationship between the symptom and the condi tions in which the malfunction described by the cus-
tomer occurs.
>> GO TO 5.
4.REPRODUCE MALFUNCTION SYMPTOM
Check the malfunction described by the customer on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to TM-74, "
Fail-Safe".
When a malfunction symptom is reproduced, t he question sheet is effective. Refer to TM-89, "
Question sheet".
Verify the relationship between the symptom and the condi tions in which the malfunction described by the cus-
tomer occurs.
>> GO TO 6.
5.PERFORM “DTC CONFIRMATION PROCEDURE”
Perform “DTC CONFIRMATION PROCEDURE” of the appr opriate DTC to check if DTC is detected again.
Refer to TM-77, "
DTC Inspection Priority Chart" when multiple DTCs are detected, and then determine the
order for performing the diagnosis.
NOTE:
If no DTC is detected, refe r to the freeze frame data.
Is any DTC detected?
YES >> GO TO 7.
NO >> Check according to GI-40, "
Intermittent Incident".
Revision: 2010 May2011 QX56

DIAGNOSIS AND REPAIR WORK FLOWTM-89
< BASIC INSPECTION > [7AT: RE7R01B]
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6.IDENTIFY MALFUNCTIONING SYSTEM WI TH “DIAGNOSIS CHART BY SYMPTOM”
Use TM-165, "
Symptom Table" from the symptom inspection result in step 4. Then identify where to start per-
forming the diagnosis based on possible causes and symptoms.
>> GO TO 8.
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.
>> GO TO 8.
8.FINAL CHECK
Perform “DTC CONFIRMATION PROCEDURE” again to make sure that the repair is correctly performed.
Check that malfunctions are not reproduced when obtai ning the malfunction information from the customer,
referring to the symptom inspection result in step 3 or 4.
Is DTC or malfunction symptom reproduced?
YES-1 >> DTC is reproduced: GO TO 5.
YES-2 >> Malfunction symptom is reproduced: GO TO 6.
NO >> Before delivering the vehicle to the customer, make sure that DTC is erased.
Question sheetINFOID:0000000006226790
DESCRIPTION
There are many operating conditions that may cause a malfunction
of the transmission parts. By understanding those conditions prop-
erly, a quick and exact diagnosis can be achieved.
In general, customers have their own criteria for a problem. There-
fore, it is important to understand the symptom and status well
enough by asking the customer about the concerns carefully. In
order to systemize all the inform ation for the diagnosis, prepare the
question sheet referring to the question points.
WORKSHEET SAMPLE
SEF907L
Question Sheet
Customer name MR/MS Engine # Manuf. Date Incident Date VIN
Model & Year In Service Date
Trans. Mileage km / Mile
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING TRANSMISSION ASSEMBLY
TM-91
< BASIC INSPECTION > [7AT: RE7R01B]
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ADDITIONAL SERVICE WHEN REPL ACING TRANSMISSION ASSEMBLY
DescriptionINFOID:0000000006233270
Decel G sensor calibration must be performed when replacing A/T assembly.
Special Repair RequirementINFOID:0000000006233271
1.PREPARATION BEFORE CALIBRATION PROCEDURE
1. Park the vehicle on a flat road.
2. Adjust pressure in all tires to the specified value. Refer to WT-69, "
Tire Air Pressure".
>> GO TO 2.
2.PERFORM CALIBRATION
With CONSULT-III
1. Turn ignition switch ON.
CAUTION:
Never start the engine.
2. Select “G SENSOR CALIBRATION” in “Work Support” in “TRANSMISSION”.
3. Touch “START”. CAUTION:
Never give any motion to the vehicle during the calibration.
Is
“completed” displayed?
YES >> GO TO 3.
NO >> Perform the calibration again.
3.CHECK DTC
With CONSULT-III
1. Turn ignition switch OFF and wait 10 seconds or more.
2. Turn ignition switch ON.
3. Select “Self Diagnostic Results” in “ABS”.
Is
“C1145” or “C1146” detected?
YES >> Refer to BRC-51, "DTC Index".
NO >> Calibration end.
Revision: 2010 May2011 QX56