2007 INFINITI QX56 Factory Service Manual

alarm fuel type coolant reservoir park assist tyre pressure sensor

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INFINITI QX56 2007 Factory Service Manual AT-3
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Possible Cause .....................................................128
DTC Confirmation Proc

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128
Possible Cause .....................................................128
DTC Confirmation Procedure ................................128
Diagnosis Procedure .............................................128
DTC P1752 INPUT CLUTCH SOLENOID
VALVE ..............................................................
130
Description ............................................................130
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
130
On Board Diagnosis Logic ....................................130
Possible Cause .....................................................130
DTC Confirmation Procedure ................................130
Diagnosis Procedure .............................................130
DTC P1754 INPUT CLUTCH SOLENOID
VALVE FUNCTION ..........................................
132
Description ............................................................132
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
132
On Board Diagnosis Logic ....................................132
Possible Cause .....................................................132
DTC Confirmation Procedure ................................132
Diagnosis Procedure .............................................133
DTC P1757 FRONT BRAKE SOLENOID
VALVE ..............................................................
134
Description ............................................................134
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
134
On Board Diagnosis Logic ....................................134
Possible Cause .....................................................134
DTC Confirmation Procedure ................................134
Diagnosis Procedure .............................................134
DTC P1759 FRONT BRAKE SOLENOID
VALVE FUNCTION ..........................................
136
Description ............................................................136
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
136
On Board Diagnosis Logic ....................................136
Possible Cause .....................................................136
DTC Confirmation Procedure ................................136
Diagnosis Procedure .............................................137
DTC P1762 DIRECT CLUTCH SOLENOID
VALVE ..............................................................
138
Description ............................................................138
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
138
On Board Diagnosis Logic ....................................138
Possible Cause .....................................................138
DTC Confirmation Procedure ................................138
Diagnosis Procedure .............................................138
DTC P1764 DIRECT CLUTCH SOLENOID
VALVE FUNCTION ..........................................
140
Description ............................................................140
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
140
On Board Diagnosis Logic .....................................140
Possible Cause ......................................................140
DTC Confirmation Procedure ................................140
Diagnosis Procedure .............................................141
DTC P1767 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE .........................
142
Description .............................................................142
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
142
On Board Diagnosis Logic .....................................142
Possible Cause ......................................................142
DTC Confirmation Procedure ................................142
Diagnosis Procedure .............................................142
DTC P1769 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE FUNCTION ......
144
Description .............................................................144
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
144
On Board Diagnosis Logic .....................................144
Possible Cause ......................................................144
DTC Confirmation Procedure ................................144
Diagnosis Procedure .............................................145
DTC P1772 LOW COAST BRAKE SOLENOID
VALVE .............................................................
146
Description .............................................................146
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
146
On Board Diagnosis Logic .....................................146
Possible Cause ......................................................146
DTC Confirmation Procedure ................................146
Diagnosis Procedure .............................................146
DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION .........................................
148
Description .............................................................148
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
148
On Board Diagnosis Logic .....................................148
Possible Cause ......................................................148
DTC Confirmation Procedure ................................148
Diagnosis Procedure .............................................149
DTC P1841 ATF PRESSURE SWITCH 1 .......150
Description .............................................................150
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
150
On Board Diagnosis Logic .....................................150
Possible Cause ......................................................150
DTC Confirmation Procedure ................................150
Diagnosis Procedure .............................................150
DTC P1843 ATF PRESSURE SWITCH 3 .......152
Description .............................................................152
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
152
On Board Diagnosis Logic .....................................152
Possible Cause ......................................................152

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INFINITI QX56 2007 Factory Service Manual AT-4
DTC Confirmation Procedure ................................152
Diagnosis Procedure .............................................152
DTC P1845 ATF PRESSURE SWITCH 5 ........154
Description .....

AT-4
DTC Confirmation Procedure ................................152
Diagnosis Procedure .............................................152
DTC P1845 ATF PRESSURE SWITCH 5 ........154
Description .............................................................154
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
154
On Board Diagnosis Logic .....................................154
Possible Cause ......................................................154
DTC Confirmation Procedure ................................154
Diagnosis Procedure .............................................154
DTC P1846 ATF PRESSURE SWITCH 6 ........156
Description .............................................................156
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
156
On Board Diagnosis Logic .....................................156
Possible Cause ......................................................156
DTC Confirmation Procedure ................................156
Diagnosis Procedure .............................................156
MAIN POWER SUPPLY AND GROUND CIR-
CUIT .................................................................
158
Wiring Diagram - AT - MAIN ..................................158
Diagnosis Procedure .............................................159
CLOSED THROTTLE POSITION AND WIDE
OPEN THROTTLE POSITION CIRCUIT .........
161
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
161
Diagnosis Procedure .............................................161
BRAKE SIGNAL CIRCUIT ..............................162
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
162
Diagnosis Procedure .............................................162
TOW MODE SWITCH ......................................163
Description .............................................................163
Wiring Diagram - AT - TMSW ................................163
Diagnosis Procedure .............................................164
TROUBLE DIAGNOSIS FOR SYMPTOMS .....165
Wiring Diagram - AT - NONDTC ............................165
A/T Check Indicator Lamp Does Not Come On .....167
Engine Cannot Be Started in "P" or "N" Position ...168
In "P" Position, Vehicle Moves When Pushed .......168
In "N" Position, Vehicle Moves ..............................169
Large Shock ("N" to "D" Position) ..........................170
Vehicle Does Not Creep Backward in "R" Position ..172
Vehicle Does Not Creep Forward in "D" Position ..175
Vehicle Cannot Be Started from D1 .......................177
A/T Does Not Shift: D1→ D2 ..................................179
A/T Does Not Shift: D2→ D3 ..................................181
A/T Does Not Shift: D3→ D4 ..................................183
A/T Does Not Shift: D4→ D5 ..................................185
A/T Does Not Perform Lock-up .............................187
A/T Does Not Hold Lock-up Condition ...................189
Lock-up Is Not Released .......................................190
Engine Speed Does Not Return to Idle .................191
A/T Does Not Shift: 5th gear → 4th gear ..............192
A/T Does Not Shift: 4th gear → 3rd gear ..............194
A/T Does Not Shift: 3rd gear → 2nd gear .............196
A/T Does Not Shift: 2nd gear → 1st gear .............197
Vehicle Does Not Decelerate By Engine Brake ....199
A/T SHIFT LOCK SYSTEM ..............................202
Description ............................................................202
Shift Lock System Electrical Parts Location ..........202
Wiring Diagram - AT - SHIFT ................................203
Shift Lock Control Unit Reference Value ..............204
Component Inspection ..........................................204
SHIFT CONTROL SYSTEM .............................207
Control Device Removal and Installation ..............207
Adjustment of A/T Position ....................................208
Checking of A/T Position .......................................208
ON-VEHICLE SERVICE ...................................209
Oil Pan ..................................................................209
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 ........................................................
210
Rear Oil Seal .........................................................219
AIR BREATHER HOSE ....................................221
Removal and Installation .......................................221
TRANSMISSION ASSEMBLY ..........................223
Removal and Installation (2WD) ...........................223
Removal and Installation (4WD) ...........................225
OVERHAUL ......................................................228
Component ...........................................................228
Oil Channel ...........................................................235
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................
237
DISASSEMBLY ................................................240
Disassembly ..........................................................240
REPAIR FOR COMPONENT PARTS ..............258
Oil Pump ...............................................................258
Front Sun Gear, 3rd One-Way Clutch ...................260
Front Carrier, Input Clutch, Rear Internal Gear .....262
Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub ..................................................
267
High and Low Reverse Clutch ..............................272
Direct Clutch .........................................................274
ASSEMBLY ......................................................277
Assembly (1) .........................................................277
Adjustment ............................................................290
Assembly (2) .........................................................292
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
298
General Specification ............................................298
Vehicle Speed When Shifting Gears .....................298
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................
299
Stall Speed ............................................................299

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INFINITI QX56 2007 Factory Service Manual AT-5
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A/T Fluid Temperature Sensor ..............................299
Turbine Revolution Se

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INFINITI QX56 2007 Factory Service Manual AT-6
< SERVICE INFORMATION >
INDEX FOR DTC
SERVICE INFORMATION
INDEX FOR DTC
Alphabetical IndexINFOID:0000000003532216
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnos

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INFINITI QX56 2007 Factory Service Manual INDEX FOR DTC
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*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assig

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INFINITI QX56 2007 Factory Service Manual AT-8
< SERVICE INFORMATION >
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003532218
The Supplemental Restraint Syst

AT-8
< SERVICE INFORMATION >
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003532218
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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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 har-
ness connectors.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000003532219
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 an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to light up due to a 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 a malfunction of the EGR system or fuel injection system, etc.
• Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionINFOID:0000000003532220
•Before connecting or disconnecting the A/T assembly har-
ness connector, turn ignition switch “OFF” and disconnect
negative battery cable. Because battery voltage is applied to
TCM even if ignition switch is turned “OFF”.
SEF289H

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INFINITI QX56 2007 Factory Service Manual PRECAUTIONS
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< SERVICE INFORMATION >
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•After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.
If the repair i

PRECAUTIONS
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< SERVICE INFORMATION >
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•After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.
If the repair is completed the DTC should not be displayed in
the “DTC CONFIRMATION PROCEDURE”.
• Always use the specified brand of ATF. Refer to MA-10
.
• Use paper rags not cloth rags during work.
• After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.
• Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to pre-
vent the internal parts from becoming contaminated by dirt or other foreign matter.
• Disassembly should be done in a clean work area.
• Use lint-free cloth 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 replaced any time the transmission is disassembled.
• It is very important to perform functional 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. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to AT-
15, "A/T Fluid Cooler Cleaning".
• After overhaul, refill the transmission with new ATF.
• When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque con-
verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
AT-13, "
Changing Automatic Transmission Fluid (ATF)", AT-13, "Checking Automatic Transmission Fluid
(ATF)".
Service Notice or PrecautionINFOID:0000000003532221
ATF COOLER SERVICE
If A/T fluid 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 radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to AT-15, "
A/T
Fluid Cooler Cleaning". For radiator replacement, refer to CO-13.
CHECKING AND CHANGING A/T FLUID SERVICE
Increase ATF temperature by 80°C (176°F) once, and then check ATF level in 65°C (149°F) when adjusting
ATF level.
NOTE:
JA60 uses both systems of a water-cooling and of an air-cooling. Air-cooling system has a by-pass valve.
When ATF temperature is not over 50°C (122°F) with water-cooling system OFF, it does not flow to air-cooling
system. If ATF level is set without the flow of ATF, the level will be 10mm lower than the standard. Therefore,
piping should be filled with ATF when adjusting level.
OBD-II SELF-DIAGNOSIS
• A/T self-diagnosis is performed by the TCM in combination with the ECM. Refer to the table on AT-83,
"CONSULT-II Function (A/T)" for the indicator used to display each self-diagnostic result.
SEF217U

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INFINITI QX56 2007 Factory Service Manual AT-10
< SERVICE INFORMATION >
PRECAUTIONS
• The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure on AT-39, "
OBD

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