2008 NISSAN LATIO service

TROUBLE DIAGNOSIS
AT-43
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AT
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Customer name MR./MS Model & Year VIN
Trans. model Engine Mileage
Incident Date Manuf. Date In Service Date
Frequency❏ Continuous❏ Intermittent ( times a day)
Symptoms❏ Vehicle does not move. (❏ Any position❏ Particular position)
❏ No up-shift (❏ 1st → 2nd❏ 2nd → 3rd❏ 3rd → 4th)
❏ No down-shift (❏ 4th → 3rd❏ 3rd → 2nd❏ 2nd → 1st)
❏ Lock-up malfunction
❏ Shift point too high or too low.
❏ Shift shock or slip (❏ N → D❏ Lock-up❏ Any drive position)
❏ Noise or vibration
❏ No kick down
❏ No pattern select
❏ Others
()
Malfunction indicator lamp (MIL)❏ Continuously lit❏ Not lit
1.❏ Read the Fail-safe and listen to customer complaints.AT- 3 9,
"Information
from custom-
er"
2.❏ Check A/T fluidMA-22
❏ Leakage (Follow specified procedure)
❏ Fluid condition
❏ Fluid level
3.❏ Perform “STALL TEST” and “LINE PRESSURE TEST”.AT- 4 8
,
AT- 4 8
❏“STALL TEST”— Mark possible damaged components/others.
❏ Torque converter one-way clutch
❏ Reverse clutch
❏ Forward clutch
❏ Overrun clutch
❏ Forward one-way clutch❏ Low & reverse brake
❏ Low one-way clutch
❏ Engine
❏ Line pressure is low
❏ Clutches and brakes except high clutch and
brake band are OK
❏“LINE PRESSURE TEST”— Suspected parts:

AT-44
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
4.❏ Perform “Road Test”.AT- 5 2
4-1. “Check Before Engine is Started”AT- 5 3
❏AT- 1 7 6 , "OD OFF Indicator Lamp Does Not Come On"
❏ Perform self-diagnosis. Enter checks for detected items. AT- 7 3 , AT- 7 8 .
❏AT- 8 3
.
❏AT- 8 6
.
❏AT- 9 1
.
❏AT- 9 6
.
❏AT- 1 0 1
.
❏AT- 1 0 5
❏AT- 1 0 8 .
❏AT- 111
.
❏AT- 11 4
.
❏AT- 11 9
.
❏AT- 1 2 4
.
❏AT- 1 2 9
.
❏AT- 1 3 4
.
❏AT- 1 3 9
.
❏AT- 1 4 4
.
❏AT- 1 4 9
.
❏AT- 1 5 2
.
❏AT- 1 5 8
.
❏AT- 1 6 3
.
❏AT- 1 6 4
.
4-2. “Check at Idle”AT- 5 3
❏AT- 1 7 8 , "Engine Cannot Be Started in "P" and "N" Position" .
❏AT- 1 7 9 , "
In "P" Position, Vehicle Moves Forward or Backward When Pushed" .
❏AT- 1 7 9 , "
In "N" Position, Vehicle Moves" .
❏AT- 1 8 0 , "
Large Shock "N" → "R" Position" .
❏AT- 1 8 1 , "
Vehicle Does Not Creep Backward in "R" Position" .
❏AT- 1 8 2 , "
Vehicle Does Not Creep Forward in "D", "2" or "1" Position" .

TROUBLE DIAGNOSIS
AT-45
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4. 4-3. “Cruise Test”AT- 5 5
Part 1
❏AT- 1 8 3 , "
Vehicle Cannot Be Started from D1" .
❏AT- 1 8 5 , "
A/T Does Not Shift: D1→ D2or Does Not Kickdown: D4→ D2" .
❏AT- 1 8 6 , "
A/T Does Not Shift: D2→ D3" .
❏AT- 1 8 8 , "
A/T Does Not Shift: D3→ D4" .
❏AT- 1 8 9 , "
A/T Does Not Perform Lock-up" .
❏AT- 1 9 0 , "
A/T Does Not Hold Lock-up Condition" .
❏AT- 1 9 1 , "
Lock-up Is Not Released" .
❏AT- 1 9 2 , "
Engine Speed Does Not Return to Idle (Light Braking D4→ D3)" .
Part 2AT- 5 8
❏AT- 1 8 3 , "Vehicle Cannot Be Started from D1" .
❏AT- 1 8 5 , "
A/T Does Not Shift: D1→ D2or Does Not Kickdown: D4→ D2" .
❏AT- 1 8 6 , "
A/T Does Not Shift: D2→ D3" .
❏AT- 1 8 8 , "
A/T Does Not Shift: D3→ D4" .
Part 3AT- 5 9
❏AT- 1 9 3 , "A/T Does Not Shift: D4→ D3, When OD OFF" .
❏AT- 1 9 4 , "
A/T Does Not Shift: D3→ 22, When Selector Lever "D" → "2" Position" .
❏AT- 1 9 5 , "
A/T Does Not Shift: 22→ 11, When Selector Lever "2" → "1" Position" .
❏AT- 1 9 7 , "
Vehicle Does Not Decelerate by Engine Brake" .
❏ Perform self-diagnosis. Enter checks for detected items. AT- 7 3
, AT- 7 8 .
❏AT- 8 3
.
❏AT- 8 6
.
❏AT- 9 1
.
❏AT- 9 6
.
❏AT- 1 0 1
.
❏AT- 1 0 5
❏AT- 1 0 8 .
❏AT- 111
.
❏AT- 11 4
.
❏AT- 11 9
.
❏AT- 1 2 4
.
❏AT- 1 2 9
.
❏AT- 1 3 4
.
❏AT- 1 3 9
.
❏AT- 1 4 4
.
❏AT- 1 4 9
.
❏AT- 1 5 2
.
❏AT- 1 5 8
.
❏AT- 1 6 3
.
❏AT- 1 6 4
.
5.❏ For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts.AT- 7 3
,
AT- 7 8
6.❏ Perform “Road Test”.AT- 5 2
7.❏ Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible symp-
toms and the component inspection orders.)AT- 6 1
8.❏ Erase DTC from TCM and ECM memories.AT- 3 6,
AT- 7 8

AT-46
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
A/T Electrical Parts Location
INFOID:0000000001703180
1. OD OFF indicator lamp 2. Shift position indicator 3. Accelerator pedal position (APP)
sensor
4. Turbine revolution sensor (Power
train revolution sensor)5. PNP switch 6. Terminal body (Terminal cord as-
sembly connector)
BCIA0037E

TROUBLE DIAGNOSIS
AT-47
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Circuit DiagramINFOID:0000000001703181
7. Revolution sensor 8. Dropping resistor 9. TCM
10. Overdrive control switch
BCWA0647E

AT-48
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Inspections Before Trouble Diagnosis
INFOID:0000000001703182
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
Check fluid leakage and check the fluid level. Refer to MA-22, "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
cloudyWater in the ATFReplace the ATF and check for plac-
es where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
A/TReplace 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

TROUBLE DIAGNOSIS
AT-49
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6. Accelerate to wide open throttle gradually while applying foot
brake.
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-40, "
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 functions 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)...... Forward clutch or forward one-way clutch slippage
Stall revolution is too high in “R” position:
• Engine brake does not function in “1” position. ..... 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 fluid 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: 2,310 - 2,770 rpm
SAT514G
SAT771B

AT-50
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
LINE PRESSURE TEST
Line Pressure Test Ports
SCIA7987E