lock INFINITI FX35 2005 Service Manual

ABCDEFGHIJKMLQUICK REFERENCE INDEX AGENERAL INFORMATIONGIGeneral InformationBENGINEEMEngine MechanicalLUEngine Lubrication SystemCOEngine Cooling SystemECEngine Control SystemFLFuel SystemEXExhaust SystemACCAccelerator Control SystemCTRANSMISSION/
TRANSAXLEATAutomatic TransmissionDDRIVELINE/AXLETFTransferPRPropeller ShaftFFDFront Final DriveRFDRear Final DriveFAXFront AxleRAXRear AxleESUSPENSIONFSUFront SuspensionRSURear SuspensionWTRoad Wheels & TiresFBRAKESBRBrake SystemPBParking Brake SystemBRCBrake Control SystemGSTEERINGPSPower Steering SystemHRESTRAINTSSBSeat BeltsSRSSupplemental Restraint System
(SRS)IBODYBLBody, Lock & Security SystemGWGlasses, Window System & Mir-
rorsRFRoofEIExterior & InteriorIPInstrument PanelSESeatJAIR CONDITIONERATCAutomatic Air ConditionerKELECTRICALSCStarting & Charging SystemLTLighting SystemDIDriver Information SystemWWWiper, Washer & HornBCSBody Control SystemLANLAN SystemAVAudio Visual, Navigation & Tele-
phone SystemACSAuto Cruise Control SystemPGPower Supply, Ground & Circuit Ele-
mentsLMAINTENANCEMAMaintenanceMINDEXIDXAlphabetical IndexEdition: August 2004
Revision: July 2005

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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AUTOMATIC TRANSMISSION
INDEX FOR DTC ........................................................ 5
Alphabetical Index ............................................... ..... 5
DTC No. Index .................................................... ..... 6
PRECAUTIONS ..................................................... ..... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine ............................................... ..... 7
Precautions ......................................................... ..... 8
Service Notice or Precautions ............................. ..... 9
PREPARATION ...................................................... ... 10
Special Service Tools .......................................... ... 10
Commercial Service Tools ................................... .... 11
A/T FLUID .............................................................. ... 12
Changing A/T Fluid ............................................. ... 12
Checking A/T Fluid .............................................. ... 13
A/T Fluid Cooler Cleaning ................................... ... 15
A/T CONTROL SYSTEM ....................................... ... 18
Cross-Sectional View (2WD Models) .................. ... 18
Cross-Sectional View (AWD Models) .................. ... 19
Shift Mechanism .................................................. ... 20
TCM Function ...................................................... ... 31
CAN Communication ........................................... ... 32
Input/Output Signal of TCM ................................. ... 32
Line Pressure Control ......................................... ... 33
Shift Control ........................................................ ... 34
Lock-up Control ................................................... ... 35
Engine Brake Control .......................................... ... 36
Control Valve ....................................................... ... 37
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 39
Introduction ......................................................... ... 39
OBD-II Function for A/T System .......................... ... 39
One or Two Trip Detection Logic of OBD-II ......... ... 39
OBD-II Diagnostic Trouble Code (DTC) .............. ... 39
Malfunction Indicator Lamp (MIL) ........................ ... 42
TROUBLE DIAGNOSIS ......................................... ... 43
DTC Inspection Priority Chart ............................. ... 43
Fail-safe .............................................................. ... 43
How to Perform Trouble Diagnosis for Quick and Accurate Repair ...................................................
... 45
A/T Electrical Parts Location ............................... ... 50
Circuit Diagram .................................................... ... 51
Inspections Before Trouble Diagnosis ................. ... 52
Check Before Engine Is Started .......................... ... 56
Check at Idle ........................................................ ... 57
Cruise Test - Part 1 .............................................. ... 58
Cruise Test - Part 2 .............................................. ... 60
Cruise Test - Part 3 .............................................. ... 61
Vehicle Speed at Which Gear Shifting Occurs .... ... 62
Vehicle Speed at Which Lock-up Occurs/Releases ... 63
Symptom Chart .................................................... ... 64
TCM Input/Output Signal Reference Values ........ ... 89
CONSULT-II Function (A/T) ................................. ... 90
Diagnostic Procedure without CONSULT-II ......... .103
DTC U1000 CAN COMMUNICATION LINE ........... .106
Description ........................................................... .106
On Board Diagnosis Logic ................................... .106
Possible Cause .................................................... .106
DTC Confirmation Procedure .............................. .106
Wiring Diagram — AT — CAN ............................. .107
Diagnostic Procedure .......................................... .108
DTC P0615 START SIGNAL CIRCUIT .................. .109
Description ........................................................... .109
CONSULT-II Reference Value ............................. .109
On Board Diagnosis Logic ................................... .109
Possible Cause .................................................... .109
DTC Confirmation Procedure .............................. .109
Wiring Diagram — AT — STSIG ......................... .110
Diagnostic Procedure .......................................... ..111
DTC P0700 TCM .................................................... .113
Description ........................................................... .113
On Board Diagnosis Logic ................................... .113
Possible Cause .................................................... .113
DTC Confirmation Procedure .............................. .113
Diagnostic Procedure .......................................... .113
DTC P0705 PARK/NEUTRAL POSITION SWITCH .114
Description ........................................................... .114
CONSULT-II Reference Value ............................. .114
On Board Diagnosis Logic ................................... .114

AT-2Revision: 2005 July 2005 FX
Possible Cause ....................................................
.114
DTC Confirmation Procedure .............................. .114
Wiring Diagram — AT — PNP/SW ...................... .115
Diagnostic Procedure .......................................... .116
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) .............................................. .118
Description ........................................................... .118
CONSULT-II Reference Value ............................. .118
On Board Diagnosis Logic ................................... .118
Possible Cause .................................................... .118
DTC Confirmation Procedure .............................. .118
Wiring Diagram — AT — VSSA/T ........................ .120
Diagnostic Procedure .......................................... .121
DTC P0725 ENGINE SPEED SIGNAL .................. .123
Description ........................................................... .123
CONSULT-II Reference Value ............................. .123
On Board Diagnosis Logic ................................... .123
Possible Cause .................................................... .123
DTC Confirmation Procedure .............................. .123
Diagnostic Procedure .......................................... .124
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE ................................................ .125
Description ........................................................... .125
CONSULT-II Reference Value ............................. .125
On Board Diagnosis Logic ................................... .125
Possible Cause .................................................... .125
DTC Confirmation Procedure .............................. .125
Diagnostic Procedure .......................................... .126
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .127
Description ........................................................... .127
CONSULT-II Reference Value ............................. .127
On Board Diagnosis Logic ................................... .127
Possible Cause .................................................... .127
DTC Confirmation Procedure .............................. .127
Diagnostic Procedure .......................................... .128
DTC P0745 LINE PRESSURE SOLENOID VALVE .129
Description ........................................................... .129
CONSULT-II Reference Value ............................. .129
On Board Diagnosis Logic ................................... .129
Possible Cause .................................................... .129
DTC Confirmation Procedure .............................. .129
Diagnostic Procedure .......................................... .130
DTC P1702 TRANSMISSION CONTROL MODULE
(RAM) ..................................................................... .131
Description ........................................................... .131
On Board Diagnosis Logic ................................... .131
Possible Cause .................................................... .131
DTC Confirmation Procedure .............................. .131
Diagnostic Procedure .......................................... .131
DTC P1703 TRANSMISSION CONTROL MODULE
(ROM) ..................................................................... .132
Description ........................................................... .132
On Board Diagnosis Logic ................................... .132
Possible Cause .................................................... .132
DTC Confirmation Procedure .............................. .132
Diagnostic Procedure .......................................... .132
DTC P1705 THROTTLE POSITION SENSOR ...... .133
Description ........................................................... .133
CONSULT-II Reference Value ............................. .133 On Board Diagnosis Logic ...................................
.133
Possible Cause .................................................... .133
DTC Confirmation Procedure ............................... .133
Diagnostic Procedure ........................................... .134
DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ................................................................. .136
Description ........................................................... .136
CONSULT-II Reference Value .............................. .136
On Board Diagnosis Logic ................................... .136
Possible Cause .................................................... .136
DTC Confirmation Procedure ............................... .136
Wiring Diagram — AT — FTS .............................. .137
Diagnostic Procedure ........................................... .138
Component Inspection ......................................... .140
DTC P1716 TURBINE REVOLUTION SENSOR ... .141
Description ........................................................... .141
CONSULT-II Reference Value .............................. .141
On Board Diagnosis Logic ................................... .141
Possible Cause .................................................... .141
DTC Confirmation Procedure ............................... .141
Diagnostic Procedure ........................................... .142
DTC P1721 VEHICLE SPEED SENSOR MTR ...... .143
Description ........................................................... .143
CONSULT-II Reference Value .............................. .143
On Board Diagnosis Logic ................................... .143
Possible Cause .................................................... .143
DTC Confirmation Procedure ............................... .143
Diagnostic Procedure ........................................... .144
DTC P1730 A/T INTERLOCK ................................ .145
Description ........................................................... .145
On Board Diagnosis Logic ................................... .145
Possible Cause .................................................... .145
DTC Confirmation Procedure ............................... .145
Judgement of A/T Interlock .................................. .145
Diagnostic Procedure ........................................... .146
DTC P1731 A/T 1ST ENGINE BRAKING .............. .148
Description ........................................................... .148
CONSULT-II Reference Value .............................. .148
On Board Diagnosis Logic ................................... .148
Possible Cause .................................................... .148
DTC Confirmation Procedure ............................... .148
Diagnostic Procedure ........................................... .149
DTC P1752 INPUT CLUTCH SOLENOID VALVE . .150
Description ........................................................... .150
CONSULT-II Reference Value .............................. .150
On Board Diagnosis Logic ................................... .150
Possible Cause .................................................... .150
DTC Confirmation Procedure ............................... .150
Diagnostic Procedure ........................................... .151
DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION ............................................................. .152
Description ........................................................... .152
CONSULT-II Reference Value .............................. .152
On Board Diagnosis Logic ................................... .152
Possible Cause .................................................... .152
DTC Confirmation Procedure ............................... .152
Diagnostic Procedure ........................................... .153
DTC P1757 FRONT BRAKE SOLENOID VALVE .. .154
Description ........................................................... .154

AT-4Revision: 2005 July 2005 FX
In “N” Position, Vehicle Moves .............................
.196
Large Shock (“N” to “D” Position) ........................ .197
Vehicle Does Not Creep Backward in “R” Position .200
Vehicle Does Not Creep Forward in “D” Position . .203
Vehicle Cannot Be Started from D
1 ..................... .205
A/T Does Not Shift: D
1 → D2 ............................... .208
A/T Does Not Shift: D
2 → D3 ............................... .210
A/T Does Not Shift: D
3 → D4 ............................... .212
A/T Does Not Shift: D
4 → D5 ............................... .215
A/T Does Not Perform Lock-up ........................... .217
A/T Does Not Hold Lock-up Condition ................. .219
Lock-up Is Not Released ..................................... .221
Engine Speed Does Not Return to Idle ............... .221
Cannot Be Changed to Manual Mode ................. .223
A/T Does Not Shift: 5th Gear → 4th Gear ........... .223
A/T Does Not Shift: 4th Gear → 3rd Gear ........... .225
A/T Does Not Shift: 3rd Gear → 2nd Gear .......... .227
A/T Does Not Shift: 2nd Gear → 1st Gear ........... .229
Vehicle Does Not Decelerate by Engine Brake ... .231
SHIFT CONTROL SYSTEM ................................... .233
Control Device Removal and Installation ............. .233
Control Rod Removal and Installation ................. .234
Adjustment of A/T Position .................................. .235
Checking of A/T Position ..................................... .235
A/T SHIFT LOCK SYSTEM .................................... .236
Description ........................................................... .236
Shift Lock System Electrical Parts Location ........ .236
Wiring Diagram — AT — SHIFT .......................... .237
Diagnostic Procedure .......................................... .238
KEY INTERLOCK CABLE ..................................... .240
Components ........................................................ .240
Removal and Installation ..................................... .241
ON-VEHICLE SERVICE ......................................... .243
Control Valve with TCM and A/T Fluid Temperature
Sensor 2 .............................................................. .243
Parking Components (2WD Models Only) ........... .255
Rear Oil Seal ....................................................... .262
Revolution Sensor Components (2WD Models Only) ....................................................................
.263
AIR BREATHER HOSE .......................................... .268
Removal and Installation ...................................... .268
TRANSMISSION ASSEMBLY ................................ .270
Removal and Installation (2WD Models) .............. .270
Removal and Installation (AWD Models) ............. .273
OVERHAUL ............................................................ .278
Components ......................................................... .278
Oil Channel .......................................................... .286
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ......................... .288
DISASSEMBLY ...................................................... .290
Disassembly ......................................................... .290
REPAIR FOR COMPONENT PARTS ..................... .308
Oil Pump .............................................................. .308
Front Sun Gear, 3rd One-way Clutch ................... .311
Front Carrier, Input Clutch, Rear Internal Gear .... .313
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub ............................................. .318
High and Low Reverse Clutch ............................. .323
Direct Clutch ........................................................ .326
ASSEMBLY ............................................................ .328
Assembly (1) ........................................................ .328
Adjustment ........................................................... .341
Assembly (2) ........................................................ .344
SERVICE DATA AND SPECIFICATIONS (SDS) ... .351
General Specifications ......................................... .351
Vehicle Speed at Which Gear Shifting Occurs ..... .351
Vehicle Speed at Which Lock-up Occurs/Releases .352
Stall Speed ........................................................... .352
Line Pressure ....................................................... .352
A/T Fluid Temperature Sensor ............................. .352
Turbine Revolution Sensor ................................... .353
Vehicle Speed Sensor A/T (Revolution Sensor) .. .353
Reverse Brake ..................................................... .353
Total End Play ...................................................... .353

INDEX FOR DTC AT-5
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INDEX FOR DTCPFP:00024
Alphabetical Index ACS002L1
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 1 0 6
.
*1: These numbers are prescribed by SAE J2012.
*2: For VQ35DE engine.
*3: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL. Items
(CONSULT-II screen terms) DTC
Reference page
OBD-II Except OBD-II
CONSULT-II GST (*1) CONSULT-II only “A/T”
A/T 1ST E/BRAKING — P1731 AT- 1 4 8
ATF PRES SW 1/CIRC — P1841AT- 1 7 5
ATF PRES SW 3/CIRC — P1843AT- 1 7 7
ATF PRES SW 5/CIRC — P1845AT- 1 7 9
ATF PRES SW 6/CIRC — P1846AT- 1 8 1
A/T INTERLOCK P1730 P1730AT- 1 4 5
A/T TCC S/V FNCTN P0744 P0744 AT- 1 2 7
ATF TEMP SEN/CIRC P0710 P1710AT- 1 3 6
CAN COMM CIRCUIT U1000 U1000AT- 1 0 6
D/C SOLENOID/CIRC P1762 P1762AT- 1 5 8
D/C SOLENOID FNCTN P1764 (*3) P1764 AT- 1 6 0
ENGINE SPEED SIG P0725 (*2) P0725AT- 1 2 3
FR/B SOLENOID/CIRC P1757 P1757AT- 1 5 4
FR/B SOLENOID FNCT P1759 P1759 AT- 1 5 6
HLR/C SOL/CIRC P1767 P1767AT- 1 6 2
HLR/C SOL FNCTN P1769 (*3) P1769 AT- 1 6 4
I/C SOLENOID/CIRC P1752 P1752AT- 1 5 0
I/C SOLENOID FNCTN P1754 (*3) P1754 AT- 1 5 2
L/PRESS SOL/CIRC P0745 P0745AT- 1 2 9
LC/B SOLENOID/CIRC P1772 P1772AT- 1 6 6
LC/B SOLENOID FNCT P1774 P1774 AT- 1 6 8
MANU MODE SW/CIRC — P1815AT- 1 7 0
PNP SW/CIRC P0705 P0705 AT- 11 4
STARTER RELAY/CIRC — P0615AT- 1 0 9
TCC SOLENOID/CIRC P0740 P0740AT- 1 2 5
TCM P0700(*2) P0700 AT- 11 3
TCM·RAM — P1702AT- 1 3 1
TCM·ROM — P1703AT- 1 3 2
TP SEN/CIRC A/T P1705(*2) P1705AT- 1 3 3
TURBINE REV S/CIRC P1716 P1716AT- 1 4 1
VEH SPD SE/CIR·MTR — P1721AT- 1 4 3
VEH SPD SEN/CIR AT P0720 P0720 AT- 11 8

AT-6
INDEX FOR DTC
Revision: 2005 July 2005 FX
DTC No. Index ACS002L2
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 1 0 6
.
*1: These numbers are prescribed by SAE J2012.
*2: For VQ35DE engine.
*3: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL. DTC
Items
(CONSULT-II screen terms) Reference page
OBD-II Except OBD-II
CONSULT-II GST (*1) CONSULT-II
only “A/T”
— P0615 STARTER RELAY/CIRC AT- 1 0 9
P0700(*2) P0700 TCM AT- 11 3
P0705 P0705 PNP SW/CIRCAT- 11 4
P0710 P1710 ATF TEMP SEN/CIRCAT- 1 3 6
P0720 P0720 VEH SPD SEN/CIR AT AT- 11 8
P0725 (*2) P0725 ENGINE SPEED SIG AT- 1 2 3
P0740 P0740 TCC SOLENOID/CIRCAT- 1 2 5
P0744 P0744 A/T TCC S/V FNCTNAT- 1 2 7
P0745 P0745 L/PRESS SOL/CIRCAT- 1 2 9
— P1702 TCM·RAMAT- 1 3 1
— P1703 TCM·ROMAT- 1 3 2
P1705 (*2) P1705 TP SEN/CIRC A/T AT- 1 3 3
P1716 P1716 TURBINE REV S/CIRCAT- 1 4 1
— P1721 VEH SPD SE/CIR·MTRAT- 1 4 3
P1730 P1730 A/T INTERLOCK AT- 1 4 5
— P1731 A/T 1ST E/BRAKINGAT- 1 4 8
P1752 P1752 I/C SOLENOID/CIRC AT- 1 5 0
P1754 (*3) P1754 I/C SOLENOID FNCTN AT- 1 5 2
P1757 P1757 FR/B SOLENOID/CIRCAT- 1 5 4
P1759 (*3) P1759 FR/B SOLENOID FNCT AT- 1 5 6
P1762 P1762 D/C SOLENOID/CIRCAT- 1 5 8
P1764 (*3) P1764 D/C SOLENOID FNCTN AT- 1 6 0
P1767 P1767 HLR/C SOL/CIRCAT- 1 6 2
P1769 P1769 HLR/C SOL FNCTNAT- 1 6 4
P1772 P1772 LC/B SOLENOID/CIRCAT- 1 6 6
P1774 P1774 LC/B SOLENOID FNCTAT- 1 6 8
— P1815 MANU MODE SW/CIRCAT- 1 7 0
— P1841 ATF PRES SW 1/CIRCAT- 1 7 5
— P1843 ATF PRES SW 3/CIRCAT- 1 7 7
— P1845 ATF PRES SW 5/CIRCAT- 1 7 9
— P1846 ATF PRES SW 6/CIRCAT- 1 8 1
U1000 U1000 CAN COMM CIRCUIT AT- 1 0 6

PRECAUTIONS AT-7
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ACS002L3
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.
Precautions for On Board Diagnostic (OBD) System of A/T and EngineACS002L5
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 battery cable from the negative termi-
nal before any repair or inspection work. The open/short circuit of related switches, sensors, sole-
noid 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.

PRECAUTIONS AT-9
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Service Notice or PrecautionsACS002L7
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 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- 1 5 , "
A/T
Fluid Cooler Cleaning" . For radiator replacement, refer to CO-14, "RADIATOR" (for VQ35DE), CO-41, "RADI-
AT O R" (for VK45DE).
OBD-II SELF-DIAGNOSIS

A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through
the blinking pattern of the A/T CHECK indicator or the malfunction indicator lamp (MIL). Refer to the table
on AT- 9 3 , "
SELF-DIAGNOSTIC RESULT MODE" for the indicator used to display each self-diagnostic
result.

The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM mem-
ories.
Always perform the procedure on AT- 4 0 , "
HOW TO ERASE DTC" to complete the repair and avoid
unnecessary blinking of the MIL.
For details of OBD-II, refer to EC-54, "
ON BOARD DIAGNOSTIC (OBD) SYSTEM" (for VQ35DE) or EC-745,
"ON BOARD DIAGNOSTIC (OBD) SYSTEM" (for VK45DE).

Certain systems and components, especially those related to OBD, may use the new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-74, "
HAR-
NESS CONNECTOR" .

A/T FLUID AT-15
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A/T Fluid Cooler CleaningACS004Q5
Whenever an automatic transmission is replaced, the A/T fluid cooler mounted in the radiator must be
inspected and cleaned.
Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can block or restrict the flow of ATF. In either case, mal-
function of the newly serviced A/T may result.
Debris, if present, may build up as ATF enters the cooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Identify the inlet and outlet A/T fluid cooler hoses.
3. Disconnect the A/T fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any ATF that remains in the cooler hoses to drain into the oil pan.
5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:

Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.

Spray cooler cleaner only with adequate ventilation.

Avoid contact with eyes and skin.

Do not breath vapors or spray mist.
6. Hold the hose and can as high as possible and spray Transmis- sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until ATF flows out of the cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and of the cooler outlet hose.
9. Blow compressed air regulated to 5 to 9 kg/cm
2 (70 to 130 psi)
through the cooler outlet hose for 10 seconds to force out any
remaining ATF.
10. Repeat steps 5 through 9 three additional times.
11. Position an oil pan under the banjo bolts that connect the A/T fluid cooler steel lines to the transmission.
12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the trans- mission by spraying Transmission Cooler Cleaner in a continuous stream for 5 seconds.
14. Blow compressed air regulated to 5 to 9 kg/cm
2 (70 to 130 psi) through each steel line from the cooler
side back toward the transmission for 10 seconds to force out any remaining ATF.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform AT- 1 6 , "
A/T FLUID COOLER DIAGNOSIS PROCEDURE" .
SCIA3830E
SCIA3831E
SCIA3832E

A/T CONTROL SYSTEM AT-31
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TCM FunctionACS002LF
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 signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed signal
Manual mode switch signal
Stop lamp switch signal
Turbine revolution sensor
ATF pressure switch Shift 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 system Input 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 r te r re l a y
Back-up lamp relay
SCIA5325E