torque NISSAN LATIO 2010 Service Repair Manual

AT-2
Wiring Diagram - AT - TR/SW ................................91
Diagnosis Procedure ..............................................92
Component Inspection ............................................94
P0710 TRANSMISSION FLUID TEMPERA-
TURE SENSOR A ..............................................
95
Description ........................................................... ...95
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ...
95
On Board Diagnosis Logic ......................................95
Possible Cause .......................................................95
DTC Confirmation Procedure .................................95
Wiring Diagram - AT - FTS .....................................96
Diagnosis Procedure ..............................................96
Component Inspection ............................................99
P0720 OUTPUT SPEED SENSOR ..................100
Description ........................................................... ..100
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
100
On Board Diagnosis Logic .....................................100
Possible Cause ......................................................100
DTC Confirmation Procedure ................................100
Wiring Diagram - AT - VSSA/T ..............................101
Diagnosis Procedure ........................................... ..102
P0725 ENGINE SPEED ...................................105
Description ........................................................... ..105
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
105
On Board Diagnosis Logic .....................................105
Possible Cause ......................................................105
DTC Confirmation Procedure ................................105
Wiring Diagram - AT - ENGSS ..............................106
Diagnosis Procedure .............................................107
P0731 1GR INCORRECT RATIO ....................109
Description ........................................................... ..109
On Board Diagnosis Logic .....................................109
Possible Cause ......................................................109
DTC Confirmation Procedure ................................109
Diagnosis Procedure .............................................110
P0732 2GR INCORRECT RATIO ....................112
Description ........................................................... ..112
On Board Diagnosis Logic .....................................112
Possible Cause ......................................................112
DTC Confirmation Procedure ................................112
Diagnosis Procedure .............................................113
P0733 3GR INCORRECT RATIO ....................115
Description ........................................................... ..115
On Board Diagnosis Logic .....................................115
Possible Cause ......................................................115
DTC Confirmation Procedure ................................115
Diagnosis Procedure .............................................116
P0734 4GR INCORRECT RATIO ....................118
Description ........................................................... ..118
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
118
On Board Diagnosis Logic ....................................118
Possible Cause .....................................................118
DTC Confirmation Procedure ................................118
Diagnosis Procedure .............................................119
P0740 TORQUE CONVERTER ........................123
Description ........................................................... .123
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
123
On Board Diagnosis Logic ....................................123
Possible Cause .....................................................123
DTC Confirmation Procedure ................................123
Wiring Diagram - AT - TCV ...................................124
Diagnosis Procedure .............................................125
Component Inspection ..........................................126
P0744 TORQUE CONVERTER ........................128
Description ........................................................... .128
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
128
On Board Diagnosis Logic ....................................128
Possible Cause .....................................................128
DTC Confirmation Procedure ................................128
Diagnosis Procedure .............................................129
P0745 PRESSURE CONTROL SOLENOID A ..133
Description ........................................................... .133
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
133
On Board Diagnosis Logic ....................................133
Possible Cause .....................................................133
DTC Confirmation Procedure ................................133
Wiring Diagram - AT - LPSV .................................134
Diagnosis Procedure .............................................135
Component Inspection ..........................................137
P0750 SHIFT SOLENOID A .............................138
Description ............................................................138
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
138
On Board Diagnosis Logic ....................................138
Possible Cause .....................................................138
DTC Confirmation Procedure ................................138
Wiring Diagram - AT - SSV/A ................................139
Diagnosis Procedure ............................................ .140
Component Inspection ..........................................141
P0755 SHIFT SOLENOID B .............................143
Description ............................................................143
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
143
On Board Diagnosis Logic ....................................143
Possible Cause .....................................................143
DTC Confirmation Procedure ................................143
Wiring Diagram - AT - SSV/B ................................144
Diagnosis Procedure ............................................ .145
Component Inspection ..........................................146
Revision: January 20102010 Versa

INDEX FOR DTCAT-5
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
SERVICE INFORMATION
INDEX FOR DTC
Alphabetical IndexINFOID:0000000005397207
NOTE:
If DTC “CAN COMM CIRCUIT” is di splayed with other DTCs, first perform the trouble diagnosis for
DTC “CAN COMM CIRCUIT”. Refer to AT- 8 7
.
*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 “Output speed sensor signal” and the “Vehicle speed signal” meet the fail-safe condition at the
same time.
DTC No. IndexINFOID:0000000005397208
NOTE:
If DTC “CAN COMM CIRCUIT” is di splayed with other DTCs, first perform the trouble diagnosis for
DTC “CAN COMM CIRCUIT”. Refer to AT- 8 7
.
Items
(CONSULT-III screen terms) DTC*1Reference page
CONSULT-III or GST
BATT/FLUID TEMP SEN —AT-156
CAN COMM CIRCUIT U1000AT- 8 7
CONTROL UNIT (RAM) —AT-167
CONTROL UNIT (ROM) —AT-167
ENGINE SPEED P0725AT-105
FLUID TEMP SENSOR A P0710AT- 9 5
INPUT SPEED SENSOR A —AT-162
OUTPUT SPEED SENSOR*3P0720 AT-100
OVER CLUTCH SOLENOID P1760AT-148
PC SOLENOID A P0745AT-133
SHIFT SOLENOID A*2P0750 AT-138
SHIFT SOLENOID B*2P0755AT-143
TORQUE CONVERTER P0740AT-123
TORQUE CONVERTER P0744AT-128
T/M RANGE SENSOR A P0705AT- 9 0
VHCL SPEED SEN-MTR —AT-153
1GR INCORRECT RATIO P0731AT-109
2GR INCORRECT RATIO P0732AT- 11 2
3GR INCORRECT RATIO P0733AT- 11 5
4GR INCORRECT RATIO P0734AT- 11 8
DTC*1Items
(CONSULT-III screen terms) Reference page
CONSULT-III or GST
P0705 T/M RANGE SENSOR A AT- 9 0
P0710FLUID TEMP SENSOR A AT- 9 5
P0720
OUTPUT SPEED SENSOR*3AT- 1 0 0
P0725ENGINE SPEED AT- 1 0 5
P07311GR INCORRECT RATIO AT- 1 0 9
Revision: January 20102010 Versa

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 “utput speed sensor signal” and the “Vehicle speed signal” meet the fail-safe condition at the
same time. P0732 2GR INCORRECT RATIO
AT- 11 2
P07333GR INCORRECT RATIO AT- 11 5
P07344GR INCORRECT RATIO AT- 11 8
P0740TORQUE CONVERTER AT- 1 2 3
P0744TORQUE CONVERTER AT- 1 2 8
P0745PC SOLENOID A AT- 1 3 3
P0750
SHIFT SOLENOID A*2AT- 1 3 8
P0755SHIFT SOLENOID B*2AT- 1 4 3
P1760OVER CLUTCH SOLENOID AT- 1 4 8
U1000CAN COMM CIRCUIT AT- 8 7
—BATT/FLUID TEMP SEN AT- 1 5 6
—CONTROL UNIT (RAM) AT- 1 6 7
—CONTROL UNIT (ROM) AT- 1 6 7
—INPUT SPEED SENSOR A AT- 1 6 2
—VHCL SPEED SEN-MTR AT- 1 5 3
DTC*1Items
(CONSULT-III screen terms) Reference page
CONSULT-III or GST
Revision: January 20102010 Versa

PRECAUTIONSAT-9
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
• Gaskets, seals and O-rings should be replaced any time the A/T is disassembled.
• It is very important to perform func tional 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 pl ace during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to AT-
18, "A/T Fluid Cooler Cleaning".
• 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
AT-17, "
Changing A/T Fluid", AT-17, "Checking A/T Fluid".
Service Notice or PrecautionINFOID:0000000005397213
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 CO-17, "
Removal and Installation" (HR16DE engine models), CO-
41, "Removal and Installation" (MR18DE engine models).
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 engi ne 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 flui d 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 e xception 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-82, "
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-39, "
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 us ing ECM self-diagnostic results mode* only when the
OD OFF indicator lamp does not indicate any malfunctions.
- Transmission range switch
- A/T 1GR, 2GR, 3GR, or 4GR function
Revision: January 20102010 Versa

PREPARATIONAT-13
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
ST35272000
(J-26092)
Drift • Installing reduction pinion gear bearing inner race
• Installing idler gear bearing inner race
• Installing output gear bearing inner race (HR16DE
engine models)
a: 72 mm (2.83 in) dia.
b: 40 mm (1.57 in) dia.
c: 35.5 mm (1.398 in) dia.
ST37830000
( — )
Drift Installing idler gear bearing outer race
a: 61.9 mm (2.437 in) dia.
b: 39 mm (1.54 in) dia.
ST33200000
(J-26082)
Drift Installing differential side bearings (HR16DE engine
models)
a: 60 mm (2.36 in) dia.
b: 44.5 mm (1.752 in) dia.
ST35271000
(J-26091)
Drift • Installing idler gear
• Installing output gear (HR16DE engine models)
a: 72 mm (2.83 in) dia.
b: 63 mm (2.48 in) dia.
ST3127S000
(J-25765-A)
Preload gauge
1. GG9103000 (J-25765-A)
Torque wrench
2. HT62940000 ( — )
Socket adapter
3. HT62900000 ( — )
Socket adapter • Measuring turning torque of reduction pinion gear
• Measuring turning torque of output shaft (HR16DE
engine models)
• Measuring turning torque of final drive assembly (MR18DE engine models)
KV38105710
(J-39026)
Preload adapter • Selecting differential side bearing adjusting shim
(MR18DE engine models)
• Measuring turning torque of final drive assembly
(MR18DE engine models)
Tool number
(Kent-Moore No.)
Tool name
Description
NT107
NT084
NT091
NT115
NT124
NT087
Revision: January 20102010 Versa

A/T FLUIDAT-17
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
A/T FLUID
Checking A/T FluidINFOID:0000000005397216
1. Warm up engine.
2. Check for A/T fluid leakage.
3. Before driving, A/T fluid level can be checked at A/T fluid tem- peratures of 30° to 50°C (86° to 122° F) using the “COLD” range
on A/T fluid level gauge.
• A : Front side
• B : Reverse side
•C : Add
• D : OK
a. Park vehicle on level surface and set parking brake.
b. Start engine and move selector lever through each gear posi- tion. Leave selector lever in “P” position.
c. Check A/T fluid level with engine idling.
d. Remove A/T fluid level gauge and wipe clean with lint-free cloth. CAUTION:
When wiping the A/T fluid l evel gauge, always use lint-free
cloth.
e. Re-insert A/T fluid level gauge into A/T fluid charging pipe as far as it will go.
CAUTION:
Firmly fix the A/T fluid level ga uge to the A/T fluid charging
pipe using the stopper attached.
f. Remove A/T fluid level gauge and note reading. If reading is at low side of range, add A/T fluid to the A/T fluid charging pipe.
CAUTION:
Do not overfill.
4. Drive vehicle for approximately 5 minutes.
5. Re-check A/T fluid level at A/T fluid temperatures of 50° to 80 °C (122° to 176°F) using “HOT” range on A/
T fluid level gauge.
CAUTION:
• When wiping the A/T fluid level gauge, always use lint-free cloth.
• Firmly fix the A/T fluid level ga uge to the A/T fluid charging pipe using the stopper attached.
6. Check A/T fluid condition and make any necessary repairs. Refer to AT-51, "
Inspections Before Trouble
Diagnosis". If the A/T fluid contains frictional material (clutches, bands, etc.), or if the A/T is repaired, over-
hauled, or replaced, inspect and clean the A/T fluid cooler mounted in the radiator. Refer to AT-18, "
A/T
Fluid Cooler Cleaning".
7. Install the removed A/T fluid level gauge into the A/T fluid charging pipe. CAUTION:
Firmly fix the A/T fluid level gaug e to the A/T fluid charging pipe using the stopper attached.
Changing A/T FluidINFOID:0000000005397217
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid by removing the drain plug. Re install the drain plug to the specified torque.
CAUTION:
Do not reuse drain plug gasket.
4. Refill the transaxle with new specified A/T fluid through the A/T fluid charging pipe. Always refill the tran- saxle with the same volume of A/T fluid that was drained out.
AWDIA0660GB
SMA051D
Drain plug: Refer to AT-237, "Component".
Revision: January 20102010 Versa

A/T CONTROL SYSTEMAT-21
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
A/T CONTROL SYSTEM
Cross-Sectional ViewINFOID:0000000005397219
HR16DE engine models
SCIA7651J
1. Converter housing 2. Oil pump3. Brake band
4. Reverse clutch 5. High clutch6. Front planetary gear
7. Low one-way clutch 8. Rear planetary gear9. Forward clutch
10. Overrun clutch 11. Low & reverse brake12. Output gear
13. Band servo piston 14. Reverse clutch drum15. Side cover
16. Idler gear 17. Forward one-way clutch 18. Transaxle case
19. Reduction pinion gear 20. Final gear 21. Differential case
22. Input shaft 23. Torque converter
Revision: January 20102010 Versa

AT-22
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
MR18DE engine models
Shift MechanismINFOID:0000000005397220
CONSTRUCTION
SCIA7938E
1. Converter housing2. Oil pump3. Brake band
4. Reverse clutch 5. High clutch6. Front planetary gear
7. Low one-way clutch 8. Rear planetary gear9. Forward clutch
10. Overrun clutch 11. Low & reverse brake12. Output gear
13. Band servo piston 14. Reverse clutch drum15. Side cover
16. Idler gear 17. Forward one-way clutch 18. Transaxle case
19. Reduction pinion gear 20. Final gear21. Differential case
22. Input shaft 23. Torque converter
Revision: January 20102010 Versa

A/T CONTROL SYSTEMAT-23
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
FUNCTION OF CLUTCH AND BRAKE
CLUTCH AND BAND CHART
1. Torque converter 2. Oil pump 3. Input shaft
4. Brake band 5. Reverse clutch 6. High clutch
7. Front sun gear 8. Front pinion gear 9. Front internal gear
10. Front planetary carrier 11. Rear sun gear 12. Rear pinion gear
13. Rear internal gear 14. Rear planetary carrier 15. Forward clutch
16. Forward one-way clutch 17. Overrun clutch 18. Low one-way clutch
19. Low & reverse brake 20. Parking pawl 21. Parking gear
22. Output shaft 23. Idle gear 24. Output gear
SAT998I
Clutch and brake components Abbr. Function
5 Reverse clutch R/C To transmit input power to front sun gear 7 .
6 High clutch H/C To transmit input power to front planetary carrier 10.
15 Forward clutch F/C To connect front planetary carrier 10 with forward one-way clutch 16.
17 Overrun clutch O/C To connect front planetary carrier 10 with rear internal gear 13 .
4 Brake band B/B To lock front sun gear 7.
16 Forward one-way clutch F/O.C When forward clutch 15
is engaged, to stop rear internal gear 13 from rotating in
opposite direction against engine revolution.
18 Low one-way clutch L/O.CTo stop front planetary carrier
10 from rotating in opposite direction against en-
gine revolution.
19 Low & reverse brake L & R/B To lock front planetary carrier 10.
Shift posi-
tion R/C
5 H/C
6 F/C
15 O/C
17 Band servo
F/O.C
16 L/O.C
18 L&R/B
19 Lock-
up Remarks
2nd
apply 3rd re-
lease 4th ap-
ply
P PA R K
POSITION
R REVERSE
POSITION
N NEUTRAL
POSITION
D*4 1st *1DB B
Revision: January 20102010 Versa

AT-30
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
TCM Function
INFOID:0000000005397221
The function of the TCM is to:
• Receive input signals sent from various switches and sensors.
• Determine required line pressure, shifting poi nt, lock-up operation, and engine brake operation.
• Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transaxle senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
SAT381J
SWITCHES & SENSORS
⇒TCM
⇒ACTUATORS
Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Output speed sensor
Input speed sensor
Vehicle speed signal
Overdrive control switch signal
Stop lamp switch signal Shift control
Line pressure control
Lock-up control
Overrun clutch control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line control
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
OD OFF indicator lamp
Revision: January 20102010 Versa