2008 NISSAN LATIO service

AT-1
TRANSMISSION/TRANSAXLE
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SECTION AT
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CONTENTS
AUTOMATIC TRANSAXLE
SERVICE INFORMATION ............................5
INDEX FOR DTC .................................................5
Alphabetical Index .....................................................5
DTC No. Index ..........................................................5
PRECAUTIONS ...................................................7
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
7
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .....................................
7
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine .....................................................
7
Precaution .................................................................8
Service Notice or Precaution .....................................9
PREPARATION ..................................................10
Special Service Tool ...............................................10
Commercial Service Tool ........................................13
A/T FLUID ...........................................................15
Checking A/T Fluid ..................................................15
Changing A/T Fluid .................................................15
A/T Fluid Cooler Cleaning .......................................16
A/T CONTROL SYSTEM ....................................19
Cross-Sectional View ..............................................19
Shift Mechanism ......................................................19
TCM Function ..........................................................27
CAN Communication ...............................................28
Input/Output Signal of TCM .....................................28
Line Pressure Control .............................................29
Shift Control ............................................................30
Lock-up Control .......................................................31
Engine Brake Control (Overrun Clutch Control) ......32
Control Valve ...........................................................34
Centrifugal Cancel Mechanism ...............................34
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......36
Introduction .............................................................36
OBD-II Function for A/T System ..............................36
One or Two Trip Detection Logic of OBD-II .............36
OBD-II Diagnostic Trouble Code (DTC) ..................36
Malfunction Indicator Lamp (MIL) ............................38
TROUBLE DIAGNOSIS ....................................39
DTC Inspection Priority Chart ..................................39
Fail-Safe ..................................................................39
How to Perform Trouble Diagnosis for Quick and
Accurate Repair .......................................................
40
A/T Electrical Parts Location ...................................46
Circuit Diagram ........................................................47
Inspections Before Trouble Diagnosis .....................48
Road Test ................................................................52
Check Before Engine Is Started ..............................53
Check at Idle ............................................................53
Cruise Test - Part 1 .................................................55
Cruise Test - Part 2 .................................................58
Cruise Test - Part 3 .................................................59
Vehicle Speed at Which Gear Shifting Occurs ........61
Vehicle Speed at Which Lock-up Occurs/Releas-
es .............................................................................
61
Symptom Chart ........................................................61
TCM Terminal and Reference Value .......................71
CONSULT-III Function (A/T) ...................................73
Diagnosis Procedure without CONSULT-III ............78
DTC U1000 CAN COMMUNICATION LINE .....83
Description ...............................................................83
On Board Diagnosis Logic .......................................83
Possible Cause ........................................................83
DTC Confirmation Procedure ..................................83
Wiring Diagram - AT - CAN .....................................84
Diagnosis Procedure ...............................................85
DTC P0705 PARK/NEUTRAL POSITION
(PNP) SWITCH ..................................................
86
Description ...............................................................86
CONSULT-III Reference Value in Data Monitor
Mode ........................................................................
86
On Board Diagnosis Logic .......................................86
Possible Cause ........................................................86

AT-4
Diagnosis Procedure .............................................210
KEY INTERLOCK CABLE ...............................213
Removal and Installation .......................................213
ON-VEHICLE SERVICE ..................................216
Control Valve Assembly and Accumulators ...........216
Park/Neutral Position (PNP) Switch ......................219
Revolution Sensor .................................................221
Turbine Revolution Sensor (Power Train Revolu-
tion Sensor) ...........................................................
222
Differential Side Oil Seal ........................................223
AIR BREATHER HOSE ...................................225
Removal and Installation .......................................225
TRANSAXLE ASSEMBLY ..............................226
Removal and Installation .......................................226
OVERHAUL .....................................................230
Component ............................................................230
Oil Channel ............................................................237
Location of Adjusting Shims, Needle Bearings and
Thrust Washers .....................................................
238
Location of Snap Rings .........................................239
DISASSEMBLY ...............................................240
Disassembly ..........................................................240
REPAIR FOR COMPONENT PARTS ..............257
Manual Shaft .........................................................257
Oil Pump ................................................................260
Control Valve Assembly ........................................263
Control Valve Upper Body .....................................272
Control Valve Lower Body .....................................276
Reverse Clutch ......................................................279
High Clutch ............................................................284
Forward and Overrun Clutches .............................288
Low & Reverse Brake ............................................295
Rear Internal Gear and Forward Clutch Hub .........299
Output Shaft, Output Gear, Idler Gear, Reduction
Pinion Gear and Bearing Retainer .........................
302
Band Servo Piston Assembly ................................307
Final Drive .............................................................313
ASSEMBLY ......................................................318
Assembly (1) .........................................................318
Adjustment (1) .......................................................319
Assembly (2) .........................................................325
Adjustment (2) .......................................................330
Assembly (3) .........................................................333
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
341
General Specification ............................................341
Vehicle Speed at Which Gear Shifting Occurs .....341
Vehicle Speed at When Lock-up Occurs/Releases
.
341
Stall Speed ............................................................341
Line Pressure ........................................................341
Adjusting shims, Needle Bearings, Thrust Wash-
ers and Snap Rings ..............................................
341
Control Valves .......................................................343
Accumulator ..........................................................343
Clutches and Brakes .............................................343
Final Drive .............................................................345
Planetary Carrier ...................................................345
Oil Pump ...............................................................345
Input Shaft .............................................................345
Reduction Pinion Gear ..........................................345
Band Servo ...........................................................345
Output Shaft ..........................................................346
Bearing Retainer ...................................................346
Total End Play .......................................................346
Reverse Clutch End Play ......................................346
Removal and Installation .......................................346
Shift Solenoid Valves ............................................346
Solenoid Valves ....................................................346
A/T Fluid Temperature Sensor ..............................347
Revolution Sensor .................................................347
Dropping Resistor .................................................347
Turbine Revolution Sensor (Power Train Revolu-
tion Sensor) ...........................................................
347

INDEX FOR DTC
AT-5
< SERVICE INFORMATION >
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SERVICE INFORMATION
INDEX FOR DTC
Alphabetical IndexINFOID:0000000001703149
NOTE:
If DTC “CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis for
DTC “CAN COMM CIRCUIT”. Refer to AT- 8 3
.
*1: These numbers is prescribed by SAE J2012.
*2: When the fail-safe operation occurs, the MIL illuminates.
*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
the same time.
DTC No. IndexINFOID:0000000001703150
NOTE:
If DTC “CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis for
DTC “CAN COMM CIRCUIT”. Refer to AT- 8 3
.
Items
(CONSULT-III screen terms)DTC
Reference page
CONSULT-III or GST
*1
A/T 1ST GR FNCTN P0731AT-105
A/T 2ND GR FNCTN P0732AT-108
A/T 3RD GR FNCTN P0733AT- 111
A/T 4TH GR FNCTN P0734AT- 11 4
A/T TCC S/V FNCTN P0744AT-124
ATF TEMP SEN/CIRC P0710AT- 9 1
BATT/FLUID TEMP SEN —AT-152
CAN COMM CIRCUIT U1000AT- 8 3
CONTROL UNIT (RAM) —AT-163
CONTROL UNIT (ROM) —AT-163
ENGINE SPEED SIG P0725AT-101
LINE PRESSURE S/V P0745AT-129
OVERRUN CLUTCH S/V P1760AT-144
PNP SW/CIRC P0705AT- 8 6
SHIFT SOLENOID/V A*2P0750AT-134
SHIFT SOLENOID/V B*2P0755AT-139
T/C CLUTCH SOL/V P0740AT- 11 9
TURBINE SENSOR —AT-158
VHCL SPEED SEN-A/T*3P0720AT- 9 6
VHCL SPEED SEN-MTR —AT-149
DTC
Items
(CONSULT-III screen terms) Reference page
CONSULT-III or GST
*1
P0705 PNP SW/CIRCAT- 8 6
P0710 ATF TEMP SEN/CIRCAT- 9 1
P0720
VHCL SPEED SEN-A/T*3AT- 9 6
P0725 ENGINE SPEED SIGAT- 1 0 1
P0731 A/T 1ST GR FNCTNAT- 1 0 5

AT-6
< SERVICE INFORMATION >
INDEX FOR DTC
*1: These numbers is prescribed by SAE J2012.
*2: When the fail-safe operation occurs, the MIL illuminates.
*3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
the same time.P0732 A/T 2ND GR FNCTNAT- 1 0 8
P0733 A/T 3RD GR FNCTNAT- 111
P0734 A/T 4TH GR FNCTNAT- 11 4
P0740 T/C CLUTCH SOL/VAT- 11 9
P0744 A/T TCC S/V FNCTNAT- 1 2 4
P0745 LINE PRESSURE S/VAT- 1 2 9
P0750
SHIFT SOLENOID/V A*2AT- 1 3 4
P0755
SHIFT SOLENOID/V B*2AT- 1 3 9
P1760 OVERRUN CLUTCH S/VAT- 1 4 4
U1000 CAN COMM CIRCUITAT- 8 3
— BATT/FLUID TEMP SENAT- 1 5 2
— CONTROL UNIT (RAM)AT- 1 6 3
— CONTROL UNIT (ROM)AT- 1 6 3
— TURBINE SENSORAT- 1 5 8
— VHCL SPEED SEN-MTRAT- 1 4 9
DTC
Items
(CONSULT-III screen terms) Reference page
CONSULT-III or GST
*1

PRECAUTIONS
AT-7
< SERVICE INFORMATION >
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PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001703151
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 Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000001703152
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000001703153
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:

AT-8
< SERVICE INFORMATION >
PRECAUTIONS
• Be sure to turn the ignition switch OFF and disconnect battery negative cable from battery negative
terminal 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 connectors are 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 erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionINFOID:0000000001703154
•Before connecting or disconnecting the TCM harness connec-
tor, turn ignition switch OFF and disconnect the battery cable
from the negative terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if igni-
tion switch is turned off.
•When connecting or disconnecting pin connectors into or
from TCM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on TCM pin
terminal, when connecting pin connectors.
•Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions properly or
not. (See page AT-71, "
TCM Terminal and Reference Value".)
•After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) Confirmation Procedure”.
The DTC should not be displayed in the “DTC Confirmation
Procedure” if the repair is completed.
• Before proceeding with disassembly, thoroughly clean the outside
of the transaxle. It is important to prevent 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 A/T.
• 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 A/T 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.
SEF289H
AAT470A
MEF040DA

PRECAUTIONS
AT-9
< SERVICE INFORMATION >
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• 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
Refer to .
• After overhaul, refill the A/T 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
MA-22, "
Changing A/T Fluid", MA-22, "Checking A/T Fluid".
Service Notice or PrecautionINFOID:0000000001703155
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 oil cooler mounted in the radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. Check Service Bulletins for latest A/T oil cooler cleaning pro-
cedure. For radiator replacement, refer to Refer to CO-11
.
TORQUE CONVERTER SERVICE
The torque converter should be replaced under any of the following conditions:
• External leaks in the hub weld area.
• Converter hub is scored or damaged.
• Converter pilot is broken, damaged or fits poorly into crankshaft.
• Steel particles are found after flushing the cooler and cooler lines.
• Pump is damaged or steel particles are found in the converter.
• Vehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diagnoses
have been made. (Converter clutch material may be glazed.)
• Converter is contaminated with engine coolant containing antifreeze.
• Internal malfunction of stator roller clutch.
• Heavy clutch debris due to overheating (blue converter).
• Steel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit are
worn or damaged — indicates that lining material came from converter.
The torque converter should not be replaced if:
• The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
• The threads in one or more of the converter bolt holes are damaged.
• A/T malfunction did not display evidence of damaged or worn internal parts, steel particles or clutch plate lin-
ing material in unit and inside the fluid filter.
• Vehicle has been exposed to high mileage (only). The exception may be where the torque converter clutch
dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic, such as
taxi, delivery or police use.
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 OD OFF indicator lamp or the malfunction indicator lamp (MIL). Refer to the table
on AT-78, "
Diagnosis Procedure without CONSULT-III" 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 memo-
ries.
Always perform the procedure “HOW TO ERASE DTC” on AT-36, "
OBD-II Diagnostic Trouble Code
(DTC)" to complete the repair and avoid unnecessary blinking of the MIL.
• The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when the
OD OFF indicator lamp does not indicate any malfunctions.
-PNP switch
- A/T 1st, 2nd, 3rd, or 4th gear function
*: For details of OBD-II, refer to AT- 3 6
.
•Certain systems and components, especially those related to OBD, may use a new style slide-lock-
ing type harness connector.
For description and how to disconnect, refer to PG-65
.

AT-10
< SERVICE INFORMATION >
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000001703156
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST2505S001
(J-34301)
Oil pressure gauge set
1. ST25051001
(J-34301)
Oil pressure gauge
2. ST25052000
(J-34301)
Hose
3. ST25053000
(J-25695-3)
Joint pipe
4. ST25054000
(J-25695-4)
Adapter
5. ST25055000
(J-25695-5)
AdapterMeasuring line pressure
ST35325000
( — )
DriftInstalling LH differential side oil seal
(Use with KV31103000)
a: 215 mm (8.46 in)
b: 25 mm (0.98 in) dia.
c: M12 X 1.5P
KV31103000
(J-38982)
DriftInstalling LH differential side oil seal
(Use with ST35325000)
a: 59 mm (2.32 in) dia.
b: 49 mm (1.93 in) dia.
ST37830000
( — )
DriftInstalling idler gear bearing outer race
a: 61.9 mm (2.437 in) dia.
b: 39 mm (1.54 in) dia.
ST27180001
(J-25726-A)
PullerRemoving idler gear
a: 100 mm (3.94 in)
b: 110 mm (4.33 in)
c: M8 X 1.25P
NT097
SCIA7102E
SCIA7103E
NT084
NT424