Valve body NISSAN LATIO 2007 Service Repair Manual

AT-3
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa Diagnostic Procedure ........................................... 172
Component Inspection ......................................... 175
DTC TURBINE REVOLUTION SENSOR ............... 176
Description ........................................................... 176
CONSULT-II Reference Value .............................. 176
On Board Diagnosis Logic ................................... 176
Possible Cause .................................................... 176
DTC Confirmation Procedure ............................... 176
Wiring Diagram — AT — PT/SEN ........................ 177
Diagnostic Procedure ........................................... 178
CONTROL UNIT (RAM), CONTROL UNIT (ROM) . 182
Description ........................................................... 182
On Board Diagnosis Logic ................................... 182
Possible Cause .................................................... 182
DTC Confirmation Procedure ............................... 182
Diagnostic Procedure ........................................... 182
MAIN POWER SUPPLY AND GROUND CIRCUIT . 183
Wiring Diagram — AT — MAIN ............................ 183
Diagnostic Procedure ........................................... 184
PNP, OD SWITCH AND CLOSED THROTTLE,
WIDE OPEN THROTTLE POSITION SIGNAL CIR-
CUIT ........................................................................ 186
CONSULT-II Reference Value .............................. 186
TCM Terminals and Reference Value ................... 186
Diagnostic Procedure ........................................... 187
Component Inspection ......................................... 191
SHIFT POSITION INDICATOR CIRCUIT ............... 192
Description ........................................................... 192
CONSULT-II Reference Value .............................. 192
Diagnostic Procedure ........................................... 192
TROUBLE DIAGNOSIS FOR SYMPTOMS ............ 193
Wiring Diagram — AT — NONDTC ...................... 193
OD OFF Indicator Lamp Does Not Come On ...... 198
Engine Cannot Be Started in “P” and “N” Position . 200
In “P” Position, Vehicle Moves Forward or Backward
When Pushed ....................................................... 201
In “N” Position, Vehicle Moves ............................. 201
Large Shock “N” → “R” Position ........................... 202
Vehicle Does Not Creep Backward in “R” Position . 203
Vehicle Does Not Creep Forward in “D”, “2” or “1”
Position ................................................................ 205
Vehicle Cannot Be Started from D
1 ...................... 206
A/T Does Not Shift: D
1 → D2 or Does Not Kickdown:
D
4 → D2 ............................................................... 208
A/T Does Not Shift: D
2 → D3 ............................... 210
A/T Does Not Shift: D
3 → D4 ............................... 212
A/T Does Not Perform Lock-up ............................ 214
A/T Does Not Hold Lock-up Condition ................. 215
Lock-up Is Not Released ...................................... 216
Engine Speed Does Not Return to Idle (Light Brak-
ing D
4 → D3 ) ....................................................... 217
A/T Does Not Shift: D
4 → D3 , When OD OFF .... 218
A/T Does Not Shift: D
3 → 22 , When Selector Lever
“D” → “2” Position ................................................ 219
A/T Does Not Shift: 2
2 → 11 , When Selector Lever
“2” → “1” Position ................................................. 221
Vehicle Does Not Decelerate by Engine Brake .... 223
TCM Self-diagnosis Does Not Activate ................ 227TRANSMISSION CONTROL MODULE ..................228
Removal and Installation ......................................228
SHIFT CONTROL SYSTEM ....................................229
Control Device Removal and Installation ..............229
Control Device Disassembly and Assembly .........232
Selector Lever Knob Removal and Installation .....233
Adjustment of A/T Position ...................................233
Checking of A/T Position ......................................234
A/T SHIFT LOCK SYSTEM ....................................235
Description ............................................................235
Shift Lock System Parts Location .........................235
Wiring Diagram — AT — SHIFT ...........................236
Diagnostic Procedure ...........................................237
KEY INTERLOCK CABLE ......................................239
Removal and Installation ......................................239
ON-VEHICLE SERVICE ..........................................242
Control Valve Assembly and Accumulators ..........242
Park/Neutral Position (PNP) Switch .....................246
Revolution Sensor ................................................247
Turbine Revolution Sensor (Power Train Revolution
Sensor) .................................................................248
Differential Side Oil Seal .......................................250
AIR BREATHER HOSE ..........................................252
Removal and Installation ......................................252
TRANSAXLE ASSEMBLY ......................................253
Removal and Installation ......................................253
OVERHAUL ............................................................257
Components .........................................................257
Oil Channel ...........................................................265
Locations of Adjusting Shims, Needle Bearings and
Thrust Washers ....................................................266
Locations of Snap Rings .......................................267
DISASSEMBLY .......................................................268
Disassembly .........................................................268
REPAIR FOR COMPONENT PARTS .....................285
Manual Shaft ........................................................285
Oil Pump ...............................................................289
Control Valve Assembly ........................................293
Control Valve Upper Body ....................................302
Control Valve Lower Body ....................................306
Reverse Clutch .....................................................309
High Clutch ...........................................................314
Forward and Overrun Clutches ............................320
Low & Reverse Brake ...........................................327
Rear Internal Gear and Forward Clutch Hub ........332
Output Shaft, Output Gear, Idler Gear, Reduction
Pinion Gear and Bearing Retainer ........................336
Band Servo Piston Assembly ...............................343
Final Drive ............................................................349
ASSEMBLY .............................................................354
Assembly (1) .........................................................354
Adjustment (1) ......................................................355
Assembly (2) .........................................................361
Adjustment (2) ......................................................366
Assembly (3) .........................................................369
SERVICE DATA AND SPECIFICATIONS (SDS) ....378
General Specifications ..........................................378
Vehicle Speed at Which Gear Shifting Occurs .....378
Vehicle Speed at When Lock-up Occurs/Releases .378

PRECAUTIONS
AT-9
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa

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.

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
converter 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 - 1 7 , "
Changing A/T Fluid" , AT- 1 6 , "Checking A/T Fluid" .
Service Notice or PrecautionsUCS005M4
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, "
RADIATOR" .
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
lining 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.

ON-VEHICLE SERVICE
AT-243
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa
7. Disconnect terminal cord assembly harness connector.
8. Remove snap ring from terminal body.
9. Remove terminal cord assembly by pushing terminal body into
transaxle case.
10. Remove control valve assembly bolts (A), (B) and (C).
Bolt length, number and location:
11. Remove control valve assembly from transaxle case.
CAUTION:
Be careful not to drop manual valve and servo release accumulator return spring.
12. Remove manual valve from control valve assembly.
CAUTION:
Be careful not to drop manual valve.
13. Remove O-ring from terminal body.
14. Disassemble and inspect control valve assembly if necessary.
Refer to AT-293, "
Control Valve Assembly" , AT- 3 0 2 , "Control
Valve Upper Body" and AT-306, "Control Valve Lower Body" .
15. Remove servo release accumulator piston and N-D accumulator
piston by applying compressed air if necessary.
CAUTION:
Hold each piston with lint-free cloth.
SCIA4853E
Bolt symbol A B C
Bolt length “ ” mm (in)
40.0 mm
(1.575 in)33.0 mm
(1.299 in)43.5 mm
(1.713 in)
Number of bolts 5 6 2
WCIA0649E
SCIA3150E
SCIA4854E

ON-VEHICLE SERVICE
AT-245
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa
Inspection

Inspect the sliding surfaces of each accumulator piston and
transaxle case, and replace if damaged or dented.
(1): Servo release accumulator piston
(2): N-D accumulator piston

Inspect the sliding surfaces of manual valve and valve body, and
replace if damaged or dented.

Inspect each return spring, and replace if damaged, deformed or
worn. Refer to AT-380, "
Accumulator" for free length (L1 ) and
length (L
2 ).
(1): Return spring (Servo release accumulator)
(2): Return spring (N-D accumulator)
CAUTION:
Do not remove spring retainer (3).
Installation
Installation is in the reverse order of removal.
CAUTION:

Completely remove all moisture, oil and old gasket from the oil pan gasket mounting surface of
transaxle case and oil pan.

Do not reuse O-rings, lip seals, oil pan gasket and oil pan bolts.

Apply ATF to manual valve, O-rings, lip seals and sliding surfaces of the transaxle case.
NOTE:

Set manual shaft in “N” position, then align manual plate (1) with
groove in manual valve (2).

After installing control valve assembly to transaxle case, make
sure that selector lever can be moved to all positions.

After completing installation, check for A/T fluid leakage and A/T
fluid level. Refer to AT- 1 6 , "
Checking A/T Fluid" .
WCIA0652E
SCIA6955E
SCIA7090E

AT-270
DISASSEMBLY
Revision: June 20062007 Versa
9. Set manual shaft (1) in “P” position.
10. Remove PNP switch (2) from transaxle case.
: Bolt (3)
11. Remove oil pan fitting bolts.
12. Remove oil pan and oil pan gasket.
13. Check foreign materials in oil pan to help determine causes of
malfunction. If the ATF is very dark, smells burned, or contains
foreign particles, frictional material (clutches, band) may need
replacement. A tacky film that will not wipe clean indicates var-
nish build up. Varnish can cause valves, servo, and clutches to
stick and can inhibit pump pressure.

If frictional material is detected, replace radiator after
repair of A/T. Refer to CO-11, "
RADIATOR" .
14. Remove magnets from oil pan.
15. Remove control valve assembly according to the following procedures.
a. Remove snap ring (1) from terminal body (2).
CAUTION:
Do not expand snap ring (1) excessively.
b. Push terminal body (2) into transaxle case.
c. Remove control valve assembly fitting bolts A , B and C .
Bolt length, number and location:
d. Remove control valve assembly from transaxle case.
CAUTION:
Be careful not to drop manual valve.
SCIA5904J
SCIA8025E
SCIA6030J
Bolt symbol A B C
Bolt length “ ” [mm (in)]
40.0 mm
(1.575 in)33.0 mm
(1.299 in)43.5 mm
(1.713 in)
Number of bolts 5 6 2
SCIA5 911 J

DISASSEMBLY
AT-271
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa
16. Remove manual valve from control valve assembly.

Inspect the sliding surfaces of manual valve and valve
body, and replace if damaged or dented.
CAUTION:
Be careful not to drop manual valve.
17. Remove O-ring from terminal body.
18. Remove return spring from servo release accumulator piston.
19. Apply compressed air into the oil hole as shown in the figure,
and remove servo release accumulator piston from transaxle
case.
CAUTION:
Strong flow of air will push the accumulator piston out
along with a splash of ATF. Cover the area with lint-free
cloth and blow air little by little to avoid this.
20. Apply compressed air into the oil hole as shown in the figure,
and remove N-D accumulator piston and return spring from tran-
saxle case.
CAUTION:
Strong flow of air will push the accumulator piston out
along with a splash of ATF. Cover the area with lint free-
cloth and blow air little by little to avoid this.
21. Remove O-rings (1) from servo release accumulator piston (2)
and N-D accumulator piston (3).
CAUTION:
Wrap the removed servo release accumulator piston (2) and
N-D accumulator piston (3) in a lint-free cloth.
SCIA3150E
SCIA3477E
SAT0 1 9DA
SAT0 2 0D
SCIA6033J

REPAIR FOR COMPONENT PARTS
AT-293
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa
Control Valve AssemblyUCS005W 5
COMPONENTS
1. Pilot filter 2. Control valve upper body 3. Steel ball
4. Separating plate 5. Control valve inter body 6. Steel ball
7. Support plate 8. Separating plate 9. Control valve lower body
10. Line pressure relief valve spring 11. Check ball 12. Torque converter pressure holding
spring
13. Solenoid valve assembly 14. Terminal body 15. O-ring
16. O-ring 17. O-ring 18. Oil strainer
Refer to GI section to make sure icons (symbol marks) in the figure. Refer to GI-10, "
Components" .
SCIA5967J

AT-294
REPAIR FOR COMPONENT PARTS
Revision: June 20062007 Versa
DISASSEMBLY
Place control valve assembly with control valve upper body (1) side
down. Remove bolts (A) to (G), reamer bolts (F), nuts and support
plates (4) according to the following procedures. Separate control
valve upper body (1), control valve inter body (2) and control valve
lower body (3).
Bolt length, number and location:
*: Reamer bolt and nut.
1. Remove bolts (A), (D), reamer bolt (F) and nut , and remove oil
strainer (1) from control valve assembly.
2. Remove bolts (A), (C) and (G), and then remove solenoid valve
assembly (1) from control valve assembly.
SCIA7058E
Bolt symbol A B C D E F*G
Bolt length “ ” [mm (in)]
13.5
(0.531)58.0
(2.283) 40.0
(1.575)66.0
(2.598)33.0
(1.299)78.0
(3.071)18.0
(0.709)
Number of bolts 63611221
SCIA7007E
SCIA7008E

REPAIR FOR COMPONENT PARTS
AT-295
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: June 20062007 Versa
3. Remove O-rings from solenoid valves and terminal body.
4. Place control valve upper body face down, and remove bolts
(B), reamer bolt (F) and nut.
CAUTION:
Remove bolts with control valve upper body facing down,
because control valve upper body and control valve inter
body may come off and steel ball may fall and be lost.
5. Remove control valve lower body (1) from control valve inter
body (2).
(3): Control valve upper body
6. Turn over control valve lower body (1).
7. Remove bolts (E), support plates (2) and separating plate (3)
from control valve lower body (1).
8. Remove check balls (1), line pressure relief valve springs (2)
and torque converter pressure holding spring (3) from control
valve lower body (4).
CAUTION:
Be careful not to lose check balls (1), line pressure relief
valve springs (2) and torque converter pressure holding
spring (3).
SCIA7180E
ATL0020D
SCIA7181E
SCIA7009E
SCIA6491J

AT-296
REPAIR FOR COMPONENT PARTS
Revision: June 20062007 Versa
9. Remove control valve inter body from control valve upper body.
10. Remove pilot filter (1) from control valve upper body (2).
11. Remove separating plate from control valve upper body (2).
12. Check to see that steel balls are properly positioned in control
valve inter body and then remove them.
CAUTION:
Be careful not to lose steel balls.
13. Check to see that steel balls are properly positioned in control
valve upper body and then remove them.
CAUTION:
Be careful not to lose steel balls.
SCIA4977E
SCIA7 011 E
SAT8 7 0J
SAT8 7 1J