2009 NISSAN LATIO clutch

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 1st gear but not in 2nd and 3rd gears. ..... Low one-way clutch slippage
• Slippage occurs in the following gears:
1st through 3rd gears in “D” position and engine brake f unctions with OD OFF. (OD OFF indicator lamp is
on.)
1st and 2nd gears in “2” position and engine brake functions with accelerator pedal released (fully closed
throttle)...... Forwar d 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 with in 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 3rd and 4th gears in “D” position. ..... High clutch slippage
• Slippage occurs in 2nd and 4th gears in “D” position. ..... Brake band slippage
• Engine brake does not function in 2nd and 3rd gears in “D” position, 2nd gear in “2” position, and 1st gear 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-373, " Stall Speed "
SAT771B

AT
N
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Line Pressure
Judgement of Line Pressure Test
Road Test INFOID:0000000004305320
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-56 .
2. Check at idle. Refer to AT-56 .
3. Cruise test • Inspection all the item from Part 1 to Part 3. Refer to AT-58 ,
AT-61 and
AT-62 .
Engine speed
Line pressure [kPa (kg/cm
2
, psi)]
D, 2nd and 1st positions R position
Idle speed AT-373, " Line Pressure "
Stall speed
Judgement Suspected 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-22, " 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

AT
N
O P
Symptom Chart
INFOID:0000000004305328
Numbers are arranged in order of inspection.
Perform inspections starting with number one and work up.
Items Symptom Condition Diagnostic item Reference page
No Lock-up Engage-
ment/TCC Inoperative Torque converter is
not locked up. ON vehicle1. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 3. Engine speed signal
AT-106 4. A/T fluid temperature sensor
AT-96 5. Line pressure test
AT-51 6. Torque converter clutch solenoid valve
AT-124 7. Control valve assembly
AT-221 OFF vehicle 8. Torque converter
AT-256Torque converter
clutch piston slip. ON vehicle1. A/T fluid level
AT-17 2. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
3. Line pressure test AT-51 4. Torque converter clutch solenoid valve
AT-124 5. Line pressure solenoid valve
AT-134 6. Control valve assembly
AT-221 OFF vehicle 7. Torque converter
AT-256Lock-up point is ex-
tremely high or low. ON vehicle1. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 3. Torque converter clutch solenoid valve
AT-124 4. Control valve assembly
AT-221

(HR16DE), EC- 570 (MR Type 1)
or EC-1082 (MR
Type 2)
2. Accelerator pedal position sensor EC-412 (MR Type
1) or EC-1481
(MR Type 2)
3. Line pressure test AT-51 4. A/T fluid temperature sensor
AT-96 5. Engine speed signal
AT-106 6. Line pressure solenoid valve
AT-134 7. Control valve assembly
AT-221 8. Accumulator N-D
AT-221 OFF vehicle 9. Forward clutch
AT-306Too sharp a shock in
changing from D 1 to
D 2 . ON vehicle1. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Line pressure test AT-51 3. Accumulator servo release
AT-221 4. Control valve assembly
AT-221 5. A/T fluid temperature sensor
AT-96 OFF vehicle 6. Brake band
AT-330Items Symptom Condition Diagnostic item Reference page

AT
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Shift Shock
Too sharp a shock in
changing from D 2
to
D 3 . ON vehicle
1. Accelerator pedal position sensor EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Line pressure test AT-51 3. Control valve assembly
AT-221 OFF vehicle
4. High clutch
AT-301 5. Brake band
AT-330Too sharp a shock in
changing from D 3 to
D 4 . ON vehicle
1. Accelerator pedal position sensor EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Line pressure test AT-51 3. Control valve assembly
AT-221 OFF vehicle
4. Brake band
AT-330 5. Overrun clutch
AT-306 6. Forward one-way clutch
AT-317Gear change shock
during deceleration by
releasing accelerator
pedal. ON vehicle1. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Line pressure test AT-51 3. Overrun clutch solenoid valve
AT-149 4. Control valve assembly
AT-221Large shock in chang-
ing from 1 2 to 1 1 in
“1” position. ON vehicle 1. Control valve assembly
AT-221OFF vehicle 2. Low & reverse brake
AT-313Items Symptom Condition Diagnostic item Reference page

AT
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No Down Shift Failure to change
gear from D 4 to D 3 . ON vehicle 1. A/T fluid level
AT-17 2. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
3. Overrun clutch solenoid valve AT-149 4. Shift solenoid valve A
AT-139 5. Line pressure solenoid valve
AT-134 6. Control valve assembly
AT-221 OFF vehicle
7. Brake band
AT-330 8. Overrun clutch
AT-306Failure to change
gear from D 3 to D 2 or
from D 4 to D 2 . ON vehicle 1. A/T fluid level
AT-17 2. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
3. Shift solenoid valve A AT-139 4. Shift solenoid valve B
AT-144 5. Control valve assembly
AT-221 OFF vehicle
6. High clutch
AT-301 7. Brake band
AT-330Failure to change
gear from D 2 to D 1 or
from D 3 to D 1 . ON vehicle 1. A/T fluid level
AT-17 2. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
3. Shift solenoid valve A AT-139 4. Shift solenoid valve B
AT-144 5. Control valve assembly
AT-221 OFF vehicle
6. Low one-way clutch
AT-256 7. High clutch
AT-301 8. Brake band
AT-330Failure to change
from D 3 to 2 2 when
shifting selector lever
into “2” position.
AT-199 ON vehicle
1. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. Shift solenoid valve B AT-144 3. Control valve assembly
AT-221 4. Control cable adjustment
AT-216 OFF vehicle 5. Brake band
AT-330Does not change from
1 2 to 1 1 in 1st posi-
tion. ON vehicle1. PNP switch adjustment
AT-224 2. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 3. Shift solenoid valve A
AT-139 4. Control valve assembly
AT-221 5. Overrun clutch solenoid valve
AT-149 OFF vehicle
6. Overrun clutch
AT-306Items Symptom Condition Diagnostic item Reference page

2. Shift solenoid valve A
AT-139 3. Control valve assembly
AT-221 4. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 5. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
OFF vehicle 6. Brake band AT-330Failure to change
gear from D 2 to D 3 . ON vehicle 1. Control cable adjustment
AT-216 2. Shift solenoid valve B
AT-144 3. Control valve assembly
AT-221 4. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 5. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
OFF vehicle 6. High clutch
AT-301 7. Brake band
AT-330Failure to change
gear from D 3 to D 4 . ON vehicle 1. PNP switch adjustment
AT-224 2. Overdrive control switch
AT-172 3. Control cable adjustment
AT-216 4. Shift solenoid valve A
AT-139 5. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 6. A/T fluid temperature sensor
AT-96 OFF vehicle 7. Brake band
AT-330A/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-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
2. PNP switch adjustment AT-224 3. Overdrive control switch
AT-172 4. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTR AT-101 ,
AT-154 5. Shift solenoid valve A
AT-139 6. Overrun clutch solenoid valve
AT-149 7. Control valve assembly
AT-221 8. A/T fluid temperature sensor
AT-96 9. Line pressure solenoid valve
AT-134 OFF vehicle
10. Brake band
AT-330 11. Overrun clutch
AT-306Items Symptom Condition Diagnostic item Reference page

AT
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Slips/Will Not Engage
Vehicle 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-216 2. Stall test
AT-51 3. Line pressure test
AT-51 4. Line pressure solenoid valve
AT-134 5. Control valve assembly
AT-221 OFF vehicle
6. Reverse clutch
AT-296 7. High clutch
AT-301 8. Forward clutch
AT-306 9. Overrun clutch
AT-306 10. Low & reverse brake
AT-313Vehicle will not run in
“D” and “2” positions
(but runs in “1” and
“R” positions). ON vehicle 1. Control cable adjustment
AT-216OFF vehicle 2. Low one-way clutch
AT-256Vehicle 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-17 2. Stall test
AT-51 3. Line pressure test
AT-51 4. Line pressure solenoid valve
AT-134 5. Control valve assembly
AT-221 6. Accumulator N-D
AT-221 OFF vehicle
7. Reverse clutch
AT-296 8. High clutch
AT-301 9. Forward clutch
AT-306 10. Forward one-way clutch
AT-317 11. Low one-way clutch
AT-256Clutches or brakes
slip somewhat in start-
ing. ON vehicle1. A/T fluid level
AT-17 2. Control cable adjustment
AT-216 3. Accelerator pedal position sensor
EC-412
(HR16DE), EC- 959 (MR Type 1)
or EC-1481 (MR
Type 2)
4. Line pressure test AT-51 5. Line pressure solenoid valve
AT-134 6. Control valve assembly
AT-221 7. Accumulator N-D
AT-221 OFF vehicle
8. Forward clutch
AT-306 9. Reverse clutch
AT-296 10. Low & reverse brake
AT-313 11. Oil pump
AT-277 12. Torque converter
AT-256Items Symptom Condition Diagnostic item Reference page