2005 INFINITI QX4 sensor

ACS-58
[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
2. VISUAL CHECK

Check ICC sensor body window for contamination and foreign materials.
OK or NG
OK >> If any contamination or foreign materials are found, remove them. Perform ICC system running
test. Refer to ACS-9, "
ICC System Running Test" .
NG >> GO TO 3.
3. VISUAL CHECK

Check ICC sensor body window for cracks and scratches.
OK or NG
OK >> GO TO 4.
NG >>

Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-60, "ICC Sen-
sor" .

Perform ICC system running test. Refer to ACS-9, "ICC System Running Test" . Then perform
self-diagnosis of ICC system again.
4. ADJUST ICC SENSOR

After performing laser beam aiming adjustment, perform ICC system running test. Refer to ACS-9, "ICC
System Running Test" . Check that preceding vehicle detection performance has been improved.
OK or NG
OK >> Inspection End.
NG >>

Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-60, "ICC Sen-
sor" .

Perform ICC system running test. Refer to ACS-9, "ICC System Running Test" . Then perform
self-diagnosis of ICC system again.

ACS-60
[ICC]
REMOVAL AND INSTALLATION
Revision: October 20052005 QX56
REMOVAL AND INSTALLATIONPFP:00000
ICC UnitEKS00BMV
ICC SensorEKS00BMW
CAUTION:
Perform the laser beam aiming procedure every time the ICC sensor is removed or installed.
ICC Steering SwitchEKS00BMX
Replace ICC steering switch as switch kit assembly. Refer to AV- 4 7 , "Removal and Installation of Steering
Wheel Audio Control Switches" .
WKIA1914E
LKIA0631E

AT-2Revision: October 20052005 QX56 Description ............................................................104
CONSULT-II Reference Value ..............................104
On Board Diagnosis Logic ....................................104
Possible Cause .....................................................104
DTC Confirmation Procedure ...............................104
Wiring Diagram — AT — PNP/SW .......................105
Diagnostic Procedure ...........................................106
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................108
Description ............................................................108
CONSULT-II Reference Value ..............................108
On Board Diagnosis Logic ....................................108
Possible Cause .....................................................108
DTC Confirmation Procedure ...............................108
Wiring Diagram — AT — VSSA/T .........................110
Diagnostic Procedure ........................................... . 111
DTC P0725 ENGINE SPEED SIGNAL ...................113
Description ............................................................113
CONSULT-II Reference Value ..............................113
On Board Diagnosis Logic ....................................113
Possible Cause .....................................................113
DTC Confirmation Procedure ...............................113
Diagnostic Procedure ...........................................113
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................115
Description ............................................................115
CONSULT-II Reference Value ..............................115
On Board Diagnosis Logic ....................................115
Possible Cause .....................................................115
DTC Confirmation Procedure ...............................115
Diagnostic Procedure ...........................................116
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .117
Description ............................................................117
CONSULT-II Reference Value ..............................117
On Board Diagnosis Logic ....................................117
Possible Cause .....................................................117
DTC Confirmation Procedure ...............................117
Diagnostic Procedure ...........................................118
DTC P0745 LINE PRESSURE SOLENOID VALVE .119
Description ............................................................119
CONSULT-II Reference Value ..............................119
On Board Diagnosis Logic ....................................119
Possible Cause .....................................................119
DTC Confirmation Procedure ...............................119
Diagnostic Procedure ...........................................120
DTC P1702 TRANSMISSION CONTROL MODULE
(RAM) ......................................................................121
Description ............................................................121
On Board Diagnosis Logic ....................................121
Possible Cause .....................................................121
DTC Confirmation Procedure ...............................121
Diagnostic Procedure ...........................................121
DTC P1703 TRANSMISSION CONTROL MODULE
(ROM) ......................................................................122
Description ............................................................122
On Board Diagnosis Logic ....................................122
Possible Cause .....................................................122
DTC Confirmation Procedure ...............................122
Diagnostic Procedure ...........................................122DTC P1705 THROTTLE POSITION SENSOR ........ 123
Description ............................................................ 123
CONSULT-II Reference Value ............................... 123
On Board Diagnosis Logic .................................... 123
Possible Cause ..................................................... 123
DTC Confirmation Procedure ................................ 123
Diagnostic Procedure ............................................ 123
DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT .................................................................. 126
Description ............................................................ 126
CONSULT-II Reference Value ............................... 126
On Board Diagnosis Logic .................................... 126
Possible Cause ..................................................... 126
DTC Confirmation Procedure ................................ 126
Wiring Diagram — AT — FTS ............................... 127
Diagnostic Procedure ............................................ 128
Component Inspection .......................................... 129
DTC P1716 TURBINE REVOLUTION SENSOR .... 131
Description ............................................................ 131
CONSULT-II Reference Value ............................... 131
On Board Diagnosis Logic .................................... 131
Possible Cause ..................................................... 131
DTC Confirmation Procedure ................................ 131
Diagnostic Procedure ............................................ 132
DTC P1721 VEHICLE SPEED SENSOR MTR ....... 133
Description ............................................................ 133
CONSULT-II Reference Value ............................... 133
On Board Diagnosis Logic .................................... 133
Possible Cause ..................................................... 133
DTC Confirmation Procedure ................................ 133
Diagnostic Procedure ............................................ 134
DTC P1730 A/T INTERLOCK ................................. 135
Description ............................................................ 135
On Board Diagnosis Logic .................................... 135
Possible Cause ..................................................... 135
DTC Confirmation Procedure ................................ 135
Judgement of A/T Interlock ................................... 136
Diagnostic Procedure ............................................ 136
DTC P1731 A/T 1ST ENGINE BRAKING ............... 138
Description ............................................................ 138
CONSULT-II Reference Value ............................... 138
On Board Diagnosis Logic .................................... 138
Possible Cause ..................................................... 138
DTC Confirmation Procedure ................................ 138
Diagnostic Procedure ............................................ 139
DTC P1752 INPUT CLUTCH SOLENOID VALVE .. 140
Description ............................................................ 140
CONSULT-II Reference Value ............................... 140
On Board Diagnosis Logic .................................... 140
Possible Cause ..................................................... 140
DTC Confirmation Procedure ................................ 140
Diagnostic Procedure ............................................ 141
DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION .............................................................. 142
Description ............................................................ 142
CONSULT-II Reference Value ............................... 142
On Board Diagnosis Logic .................................... 142
Possible Cause ..................................................... 142

AT-4Revision: October 20052005 QX56 A/T Does Not Shift: D
3 → D4 ................................199
A/T Does Not Shift: D
4 → D5 ................................202
A/T Does Not Perform Lock-up ............................204
A/T Does Not Hold Lock-up Condition ..................206
Lock-up Is Not Released ......................................208
Engine Speed Does Not Return to Idle ................209
A/T Does Not Shift: 5th gear → 4th gear ..............210
A/T Does Not Shift: 4th gear → 3rd gear ..............213
A/T Does Not Shift: 3rd gear → 2nd gear .............214
A/T Does Not Shift: 2nd gear → 1st gear .............216
Vehicle Does Not Decelerate By Engine Brake ....219
A/T SHIFT LOCK SYSTEM .....................................222
Description ............................................................222
Shift Lock System Electrical Parts Location .........222
Wiring Diagram — A/T — SHIFT ..........................223
Shift Lock Control Unit Reference Values .............224
Component Inspection ..........................................225
SHIFT CONTROL SYSTEM ....................................227
Control Device Removal and Installation ..............227
Adjustment of A/T Position ...................................228
Checking of A/T Position ......................................228
ON-VEHICLE SERVICE ..........................................229
Oil Pan ..................................................................229
Control Valve With TCM and A/T Fluid Temperature
Sensor 2 ...............................................................231
Rear Oil Seal ........................................................241
AIR BREATHER HOSE ...........................................242
Removal and Installation ......................................242
TRANSMISSION ASSEMBLY ................................244
Removal and Installation (4x2) .............................244
Removal and Installation (4x4) .............................247
OVERHAUL .............................................................250Components .......................................................... 250
Oil Channel ........................................................... 258
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings .......................... 260
DISASSEMBLY ....................................................... 262
Disassembly .......................................................... 262
REPAIR FOR COMPONENT PARTS ...................... 280
Oil Pump ............................................................... 280
Front Sun Gear, 3rd One-Way Clutch ................... 282
Front Carrier, Input Clutch, Rear Internal Gear ..... 284
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub .............................................. 289
High and Low Reverse Clutch .............................. 294
Direct Clutch ......................................................... 296
ASSEMBLY ............................................................. 298
Assembly (1) ......................................................... 298
Adjustment ............................................................311
Assembly (2) ......................................................... 314
SERVICE DATA AND SPECIFICATIONS (SDS) .... 321
General Specifications .......................................... 321
Vehicle Speed When Shifting Gears ..................... 321
Vehicle Speed When Performing and Releasing
Complete Lock-up ................................................. 322
Vehicle Speed When Performing and Releasing
Slip Lock-up .......................................................... 322
Stall Speed ............................................................ 322
Line Pressure ........................................................ 322
A/T Fluid Temperature Sensor .............................. 322
Turbine Revolution Sensor .................................... 322
Vehicle Speed Sensor A/T (Revolution Sensor) ... 322
Reverse brake ....................................................... 323
Total End Play ....................................................... 323

PRECAUTIONS
AT-7
D
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Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ECS00CDJ
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.
WA RN ING:

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.
Precautions for On Board Diagnostic (OBD) System of A/T and EngineECS00CDK
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.

A/T CONTROL SYSTEM
AT-29
D
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F
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H
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Revision: October 20052005 QX56
TCM FunctionECS00CDW
The function of the TCM is to:

Receive input signals sent from various switches and sensors.

Determine required line pressure, shifting point, lock-up operation, and engine brake operation.

Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transmission senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
CONTROL SYSTEM DIAGRAM
SENSORS (or SIGNALS)


TCM


ACTUATORS
PNP switch
Accelerator pedal position sensor
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed signal
Stop lamp switch signal
Turbine revolution sensor
1st position switch signal
4th position switch signal
ATF pressure switch signal
Tow mode switch signalShift control
Line pressure control
Lock-up control
Engine brake control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
Duet-EA control
CAN systemInput clutch solenoid valve
Direct clutch solenoid valve
Front brake solenoid valve
High and low reverse clutch
solenoid valve
Low coast brake solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
A/T CHECK indicator lamp
Sta rte r re lay
Back-up lamp relay
SCIA5624E

AT-30
A/T CONTROL SYSTEM
Revision: October 20052005 QX56
CAN CommunicationECS00CDX
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-5,
"CAN COMMUNICATION" .
Input/Output Signal of TCMECS00CDY
*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: CAN communicationsControl itemLine
pressure
controlVehicle
speed
controlShift
controlLock-up
controlEngine
brake
controlFail-safe
function
(*3)Self-diag-
nostics
function
InputAccelerator pedal position signal
(*4)XXXXXXX
Vehicle speed sensor A/T
(revolution sensor)XXXX XX
Vehicle speed sensor MTR
(*1) (*4)XXXX X
Closed throttle position signal
(*4)(*2) X (*2) X X (*2) X X
Wide open throttle position signal
(*4)(*2) X (*2) X (*2) X X
Turbine revolution sensor 1 X X X X X
Turbine revolution sensor 2
(for 4th speed only)XX X XX
Engine speed signals
(*4)XX
PNP switch XXXXXXX
A/T fluid temperature sensors 1, 2 X X X X X X X
ASCDOperation signal
(*4)XXXX
Overdrive cancel
signal
(*4)XXX
TCM power supply voltage signal X X X X X X
Out-
putDirect clutch solenoid (ATF pres-
sure switch 5)XX XX
Input clutch solenoid (ATF pressure
switch 3)XX XX
High and low reverse clutch sole-
noid (ATF pressure switch 6)XX XX
Front brake solenoid (ATF pressure
switch 1)XX XX
Low coast brake solenoid (ATF
pressure switch 2)XX XXX
Line pressure solenoid X X X X X X X
TCC solenoid X X X
Starte r re la yXX

AT-32
A/T CONTROL SYSTEM
Revision: October 20052005 QX56
During Shift Change
The necessary and adequate line pressure for shift change is set.
For this reason, line pressure pattern setting corresponds to input
torque and gearshift selection. Also, line pressure characteristic is
set according to engine speed, during engine brake operation.
At Low Fluid Temperature
When the A/T fluid temperature drops below the prescribed tempera-
ture, in order to speed up the action of each friction element, the line
pressure is set higher than the normal line pressure characteristic.
Shift ControlECS00CE0
The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the
clutch pressure is adjusted to be appropriate to the engine load state and vehicle driving state. It becomes
possible to finely control the clutch hydraulic pressure with high precision and a smoother shift change charac-
teristic is attained.
SHIFT CHANGE
The clutch is controlled with the optimum timing and oil pressure by the engine speed, engine torque informa-
tion, etc.
PCIA0010E
PCIA0 011 E
PCIA0012E