2011 NISSAN LATIO clutch

TROUBLE DIAGNOSISAT-51
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Inspections Before Trouble DiagnosisINFOID:0000000005928094
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
Check fluid leakage and check the fluid level. Refer to AT-17, "Checking A/T Fluid".
Fluid Condition Check
Check the A/T fluid condition.
STALL TEST
Stall Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF and engine oil.
2. Drive vehicle for approximately 10 minutes or until ATF and engine oil reach operating temperature.
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test. •It is good practice to mark the point of specified engine
rpm on indicator.
5. Start engine, apply foot brake, and place selector lever in “D” position.
Fluid status Conceivable Cause Required Operation
Varnished (viscous
varnish state) Clutch, brake
scorchedReplace the ATF and check the A/T
main unit and the vehicle for mal-
functions (wire harnesses, cooler
pipes, etc.)
Milky white or
cloudy Water in the ATFReplace the ATF and check for plac-
es where water is getting in.
Large amount of
metal powder mixed
in Unusual wear of
sliding parts within
A/T
Replace the ATF and check for im-
proper operation of the A/T.
SAT638A
ATF operating temperature: 50 - 80
°C (122 - 176 °F)
SAT647B
SAT513G
SAT775B
Revision: May 2010 2011 Versa

AT-52
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
6. Accelerate to wide open throttle gradually while applying footbrake.
7. Quickly note the engine stall revolution and immediately release throttle.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
8. Move selector lever to “N” position.
9. Cool off ATF. CAUTION:
Run the engine at idle for at least 1 minute.
10. Repeat steps 6 through 9 with selector lever in “2”, “1” and “R” positions.
Judgement of Stall Test
The test result and possible damaged components relating to each result are shown in the illustrations on next
page.
In order to pinpoint the possible damaged components, refer to AT-43, "
How to Perform Trouble Diagnosis for
Quick and Accurate Repair".
NOTE:
Stall revolution is too high in “D”, “2”, or “1” position:
• Slippage occurs in 1GR but not in 2GR and 3GR. ..... Low one-way clutch slippage
• Slippage occurs in the following gears:
1GR through 3GR in “D” position and engine brake functions with OD OFF. (OD OFF indicator lamp is on.)
1GR and 2GR in “2” position and engine brake functions with accelerator pedal released (fully closed throt-
tle)...... Forward clutch or forward one-way clutch slippage
Stall revolution is too high in “R” position:
• Engine brake does not function in “1” posit ion. ..... Low & reverse brake slippage
• Engine brake functions in “1” position. ..... Reverse clutch slippage
Stall revolution within specifications:
• Vehicle does not achieve speed of more than 80 km/h ( 50 MPH). ..... One-way clutch seizure in torque con-
verter housing
CAUTION:
Be careful because automatic flui d temperature increases abnormally:
• Slippage occurs in 3GR and 4GR in “D” position. ..... High clutch slippage
• Slippage occurs in 2GR and 4GR in “D” position. ..... Brake band slippage
• Engine brake does not function in 2GR and 3GR in “D” pos ition, 2GR in “2” position, and 1GR in “1” position
with OD OFF. (OD OFF indicator lamp is on.) ..... Overrun clutch slippage
Stall revolution less than specifications:
• Poor acceleration during starts. ..... One-way clutch seizure in torque converter Stall revolution:
AT-374, "
Stall Speed"
SAT514G
SAT771B
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-55
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Line Pressure
Judgement of Line Pressure Test
Road TestINFOID:0000000005928095
DESCRIPTION
• The purpose of the test is to det
ermine overall performance of A/T
and analyze causes of malfunctions.
• The road test consists of the following three parts:
1. Check before engine is started. Refer to AT- 5 6
.
2. Check at idle. Refer to AT- 5 6
.
3. Cruise test • Inspection all the item from Part 1 to Part 3. Refer to AT- 5 8
,
AT- 6 1
and AT- 6 2 .
Engine speed Line pressure [kPa (kg/cm
2 , psi)]
D, 2nd and 1st positions R position
Idle speed AT- 3 7 4 , "
Line Pressure"Sta ll sp ee d
JudgementSuspected parts
At idle Line pressure is low in all positions. • Oil pump wear
• Control piston damage
• Pressure regulator valve or plug sticking
• Spring for pressure regulator valve damaged
• Fluid pressure leakage between oil strainer and pressure regulator valve
• Clogged strainer
Line pressure is low in particular posi-
tion. • Fluid pressure leakage between manual valve and particular clutch
• For example, line pressure is:
− Low in “R” and “1 ” positions, but
− Normal in “D”, and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT- 2 2 , "
Shift Mechanism".
Line pressure is high. • Accelerator pedal position signal malfunction
• A/T fluid temperature sensor damaged
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure modifier valve sticking
• Pressure regulator valve or plug sticking
• Open in dropping resistor circuit
At stall
speed Line pressure is low.
• Accelerator pedal position signal malfunction
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure regulator valve or plug sticking
• Pressure modifier valve sticking
• Pilot valve sticking
SAT786A
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-65
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Symptom ChartINFOID:0000000005928103
Numbers are arranged in order of inspection.
Perform inspections starting with number one and work up.
Items Symptom Condition Diagnostic itemReference page
No Lock-up Engage-
ment/TCC Inoperative Torque converter is
not locked up.
ON vehicle1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Output speed sensor and vehicle speed signal AT- 1 0 0
, AT- 1 5 3
3. Engine speed signalAT- 1 0 5
4. A/T fluid temperature sensorAT- 9 5
5. Line pressure testAT- 5 1
6. Torque converter clutch solenoid valveAT- 1 2 3
7. Control valve assemblyAT- 2 2 2
OFF vehicle 8. Torque converter AT- 2 5 7
Torque converter
clutch piston slip.ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Torque converter clutch solenoid valveAT- 1 2 3
5. Line pressure solenoid valveAT- 1 3 3
6. Control valve assemblyAT- 2 2 2
OFF vehicle 7. Torque converter AT- 2 5 7
Lock-up point is ex-
tremely high or low.ON vehicle1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Output speed sensor and vehicle speed signal AT- 1 0 0
, AT- 1 5 3
3. Torque converter clutch solenoid valveAT- 1 2 3
4. Control valve assemblyAT- 2 2 2
Revision: May 2010 2011 Versa

AT-66
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Shift ShockSharp shock in shift-
ing from “N” to “D” po-
sition.
ON vehicle1. Engine idling speed
EC-24

(HR16DE), EC-
578 (MR18DE)
2. Accelerator pedal position sensor EC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. A/T fluid temperature sensorAT- 9 5
5. Engine speed signalAT- 1 0 5
6. Line pressure solenoid valveAT- 1 3 3
7. Control valve assemblyAT- 2 2 2
8. Accumulator N-DAT- 2 2 2
OFF vehicle 9. Forward clutch AT- 3 0 7
Too sharp a shock in
changing from D
1 to
D
2 . ON vehicle1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Line pressure test AT- 5 1
3. Accumulator servo releaseAT- 2 2 2
4. Control valve assemblyAT- 2 2 2
5. A/T fluid temperature sensorAT- 9 5
OFF vehicle 6. Brake band AT- 3 3 1
Shift ShockToo sharp a shock in
changing from D
2 to
D
3 . ON vehicle
1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Line pressure test AT- 5 1
3. Control valve assemblyAT- 2 2 2
OFF vehicle4. High clutch
AT- 3 0 25. Brake bandAT- 3 3 1
Too sharp a shock in
changing from D
3 to
D
4 . ON vehicle
1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Line pressure test AT- 5 1
3. Control valve assemblyAT- 2 2 2
OFF vehicle4. Brake band
AT- 3 3 15. Overrun clutchAT- 3 0 7
6. Forward one-way clutchAT- 3 1 8
Gear change shock
during deceleration by
releasing accelerator
pedal.ON vehicle1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18E)
2. Line pressure test AT- 5 1
3. Overrun clutch solenoid valveAT- 1 4 8
4. Control valve assemblyAT- 2 2 2
Large shock in chang-
ing from 1
2 to 11 in
“1” position. ON vehicle 1. Control valve assembly
AT- 2 2 2OFF vehicle 2. Low & reverse brakeAT- 3 1 4
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

AT-68
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
No Down ShiftFailure to change
gear from D
4 to D3 .
ON vehicle 1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Overrun clutch solenoid valve AT- 1 4 8
4. Shift solenoid valve A AT- 1 3 8
5. Line pressure solenoid valveAT- 1 3 3
6. Control valve assemblyAT- 2 2 2
OFF vehicle7. Brake band
AT- 3 3 18. Overrun clutchAT- 3 0 7
Failure to change
gear from D
3 to D2 or
from D
4 to D2 . ON vehicle 1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Shift solenoid valve A AT- 1 3 8
4. Shift solenoid valve BAT- 1 4 3
5. Control valve assemblyAT- 2 2 2
OFF vehicle6. High clutch
AT- 3 0 27. Brake bandAT- 3 3 1
Failure to change
gear from D
2 to D1 or
from D
3 to D1 . ON vehicle 1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Shift solenoid valve A AT- 1 3 8
4. Shift solenoid valve BAT- 1 4 3
5. Control valve assemblyAT- 2 2 2
OFF vehicle6. Low one-way clutch
AT- 2 5 77. High clutchAT- 3 0 2
8. Brake bandAT- 3 3 1
Failure to change
from D
3 to 22 when
shifting selector lever
into “2” position.
AT- 1 9 8ON vehicle 1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Shift solenoid valve B AT- 1 4 3
3. Control valve assembly AT- 2 2 2
4. Control cable adjustmentAT- 2 1 7
OFF vehicle 5. Brake band AT- 3 3 1
Does not change from
1
2 to 11 in 1st posi-
tion. ON vehicle1. Transmission range switch adjustment
AT- 2 2 5
2. Output speed sensor and vehicle speed signalAT- 1 0 0, AT- 1 5 3
3. Shift solenoid valve A AT- 1 3 8
4. Control valve assemblyAT- 2 2 2
5. Overrun clutch solenoid valveAT- 1 4 8
OFF vehicle6. Overrun clutch
AT- 3 0 77. Low & reverse brakeAT- 3 1 4
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-69
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No Up Shift Failure to change
gear from D
1 to D2 .
ON vehicle 1. Control cable adjustment
AT- 2 1 7
2. Shift solenoid valve AAT- 1 3 8
3. Control valve assemblyAT- 2 2 2
4. Output speed sensor and vehicle speed signalAT- 1 0 0, AT- 1 5 3
5. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
OFF vehicle 6. Brake band AT- 3 3 1
Failure to change
gear from D
2 to D3 .ON vehicle 1. Control cable adjustment
AT- 2 1 7
2. Shift solenoid valve BAT- 1 4 3
3. Control valve assemblyAT- 2 2 2
4. Output speed sensor and vehicle speed signalAT- 1 0 0, AT- 1 5 3
5. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
OFF vehicle 6. High clutch
AT- 3 0 2
7. Brake bandAT- 3 3 1
Failure to change
gear from D
3 to D4 .ON vehicle 1. Transmission range switch adjustment
AT- 2 2 5
2. Overdrive control switchAT- 1 7 1
3. Control cable adjustmentAT- 2 1 7
4. Shift solenoid valve AAT- 1 3 8
5. Output speed sensor and vehicle speed signalAT- 1 0 0, AT- 1 5 3
6. A/T fluid temperature sensorAT- 9 5
OFF vehicle 7. Brake band AT- 3 3 1
A/T does not shift to
D
4 when driving with
OD ON. (OD OFF in-
dicator lamp is off.) ON vehicle1. Accelerator pedal position sensor
EC-415

(HR16DE), EC-
982 (MR18DE)
2. Transmission range switch adjustment AT- 2 2 5
3. Overdrive control switchAT- 1 7 1
4. Output speed sensor and vehicle speed signalAT- 1 0 0, AT- 1 5 3
5. Shift solenoid valve AAT- 1 3 8
6. Overrun clutch solenoid valveAT- 1 4 8
7. Control valve assemblyAT- 2 2 2
8. A/T fluid temperature sensorAT- 9 5
9. Line pressure solenoid valveAT- 1 3 3
OFF vehicle10. Brake band
AT- 3 3 111. Overrun clutchAT- 3 0 7
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

AT-70
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Slips/Will Not EngageVehicle will not run in
“R” position (but runs
in “D”, “2” and “1” po-
sitions). Clutch slips.
Very poor accelera-
tion.
ON vehicle
1. Control cable adjustment
AT- 2 1 7
2. Stall testAT- 5 1
3. Line pressure testAT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Control valve assemblyAT- 2 2 2
OFF vehicle6. Reverse clutch
AT- 2 9 7
7. High clutchAT- 3 0 2
8. Forward clutchAT- 3 0 7
9. Overrun clutchAT- 3 0 7
10. Low & reverse brakeAT- 3 1 4
Vehicle will not run in
“D” and “2” positions
(but runs in “1” and
“R” positions).ON vehicle 1. Control cable adjustment
AT- 2 1 7
OFF vehicle 2. Low one-way clutchAT- 2 5 7
Vehicle will not run in
“D”, “1”, “2” positions
(but runs in R posi-
tion). Clutch slips.
Very poor accelera-
tion.ON vehicle
1. A/T fluid level
AT- 1 7
2. Stall testAT- 5 1
3. Line pressure testAT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Control valve assemblyAT- 2 2 2
6. Accumulator N-DAT- 2 2 2
OFF vehicle7. Reverse clutch
AT- 2 9 7
8. High clutchAT- 3 0 2
9. Forward clutchAT- 3 0 7
10. Forward one-way clutchAT- 3 1 8
11. Low one-way clutchAT- 2 5 7
Clutches or brakes
slip somewhat in start-
ing.ON vehicle1. A/T fluid level
AT- 1 7
2. Control cable adjustmentAT- 2 1 7
3. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
4. Line pressure test AT- 5 1
5. Line pressure solenoid valveAT- 1 3 3
6. Control valve assemblyAT- 2 2 2
7. Accumulator N-DAT- 2 2 2
OFF vehicle8. Forward clutch
AT- 3 0 7
9. Reverse clutchAT- 2 9 7
10. Low & reverse brakeAT- 3 1 4
11 . O i l p u m pAT- 2 7 8
12. Torque converterAT- 2 5 7
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa