NISSAN TEANA 2003 Workshop Manual

TROUBLE DIAGNOSIS
AT-43
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Inspections Before Trouble DiagnosisBCS00102
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
Inspect for A/T fluid leakage and check the A/T fluid level. Refer to AT- 1 4 , "Checking A/T Fluid" .
A/T Fluid Condition Check
Inspect the A/T fluid condition.
STALL TEST
Stall Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF and 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
places where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
A/TReplace the ATF and check for
improper operation of the A/T.
SAT638A
ATF operating temperature: 50 - 80°C (122 - 176°F)
SAT647B
SCIA7463E
SCIA5703E

AT-44
TROUBLE DIAGNOSIS

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 engine at idle for at leas 1 minute.
10. Repeat steps 6 through 9 with selector lever in “3”, “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- 3 7 , "
Work Flow Chart" .
NOTE:
Stall revolution is too high in “D”, “3”, “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 selector lever set to “3” position.
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
converter housing
CAUTION:
Be careful since automatic fluid temperature increases abnormally.

Slippage occurs in 3rd and 4th gears in “D” position. ..... High clutch slippage

Slippage occurs in 2nd and 4th gear in “D” position. ..... Brake band slippage

Engine brake does not function in 2nd and 3rd gears in “D” position with 3rd position switch set to ON, 2nd
gear in “2” position, and 1st gear in “1” position. ..... Overrun clutch slippage
Stall revolution less than specifications:

Poor acceleration during starts. ..... One-way clutch seizure in torque converterStall revolution
For QR20DE engine models:
2,400 - 2,850 rpm
For VQ23DE engine models:
2,400 - 2,900 rpm
SAT514G
SCIA5704E

TROUBLE DIAGNOSIS
AT-45
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SCIA7714E

AT-46
TROUBLE DIAGNOSIS

LINE PRESSURE TEST
Line Pressure Test Ports
Location of line pressure test ports are shown in the figure.

Always replace pressure plugs as they are self-sealing
bolts.
Line Pressure Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF or
engine oil.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
3. Install oil pressure gauge to corresponding line pressure test
port.
4. Set parking brake and block wheels.
SCIA3332E
ATF operating temperature: 50 - 80°C (122 -176°F)
SAT647B
SCIA4845E
SCIA7463E

TROUBLE DIAGNOSIS
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5. Start engine and measure line pressure at idle and stall speed.
CAUTION:

Keep the brake pedal pressed all the way down during
measurement.

When measuring line pressure at stall speed, refer to AT-
43, "STALL TEST" .
Line Pressure
Judgement of Line Pressure Test
SAT493G
Engine speed rpmLine pressure kPa (bar, kg/cm2 , psi)
“D”, “3”, “2” and “1” positions “R” position
Idle 500 (5.00, 5.1, 73) 778 (7.78, 7.9, 113)
Stall 1,233 (12.33, 12.6, 179) 1,918 (19.18, 19.6, 278)
Judgement Suspected parts
At idleLine 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”, “3” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT-18, "
CLUTCH AND BAND CHART" .
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
speedLine 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-48
TROUBLE DIAGNOSIS

Road TestBCS00103
DESCRIPTION

The purpose of the test is to determine 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- 4 8
.
2. Check at idle. Refer to AT- 4 8
.
3. Cruise test

Inspection all the item from Part 1 to Part 3. Refer to AT- 5 0 , AT- 5 1 and AT- 5 2 .

Before road test, familiarize yourself with all test procedures and items to check.

Perform tests on all items until specified symptom is found. Troubleshoot the items which are checked out
to be no good after road test. Refer to the following.
Refer to AT- 6 7 , "
CONSULT-II Function (A/T)" , AT- 7 6 , "Diagnostic Procedure Without CONSULT-II" and
AT- 1 6 8 , "
TROUBLE DIAGNOSIS FOR SYMPTOMS" .
Check Before Engine Is StartedBCS00104
1. CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on flat surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF. Wait at least 5 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnosis and note NG items.
Refer to AT- 6 9 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 7 6 , "Diagnostic Procedure Without
CONSULT-II" .
3. Go to AT- 4 8 , "
Check at Idle" .
NO >> Stop “Road Test”. Go to AT- 1 7 3 , "
A/T CHECK Indicator Lamp Does Not Come On" .
Check at IdleBCS00105
1. CHECK ENGINE START
1. Park vehicle on flat surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch OFF.
4. Turn ignition switch to “START” position.
Is engine started?
YES >> GO TO 2.
NO >>

Stop “Road Test”. Mark the box on the AT- 3 8 , "DIAGNOSTIC WORKSHEET" .

Go to AT- 1 7 5 , "Engine Cannot Be Started in “P” and “N” Position" .
2. CHECK ENGINE START
1. Turn ignition switch ON. (Do not start engine.)
2. Move selector lever to “R”, “D”, “3”, “2” or “1” position.
3. Turn ignition switch to “START” position.
Is engine started?
YES >>
Stop “Road Test”. Mark the box on the AT- 3 8 , "DIAGNOSTIC WORKSHEET" .

Go to AT- 1 7 5 , "Engine Cannot Be Started in “P” and “N” Position" .
NO >> GO TO 3.

TROUBLE DIAGNOSIS
AT-49
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3. CHECK VEHICLE MOVE
1. Move selector lever to “P” position.
2. Turn ignition switch OFF.
3. Release parking brake.
4. Push vehicle forward or backward.
Does vehicle move when it is pushed forward or backyard?
YES >>
Mark the box AT- 1 7 6 , "In “P” Position, Vehicle Moves Forward or Backward When Pushed" on
the AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.
NO >> GO TO 4.
4. CHECK VEHICLE MOVE
1. Apply parking brake.
2. Start engine.
3. Move selector lever to “N” position.
4. Release parking brake.
Does vehicle move forward or backward?
YES >>
Mark the box AT- 1 7 6 , "In “N” Position, Vehicle Moves" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
NO >> GO TO 5.
5. CHECK SHIFT SHOCK
1. Apply foot brake.
2. Move selector lever to “R” position.
Is there large shock when changing from
“N” to “R” position?
YES >>
Mark the box AT- 1 7 7 , "Large Shock. “N” → “R” Position" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
NO >> GO TO 6.
6. CHECK VEHICLE MOVE
Release foot brake for several seconds.
Does vehicle creep backward when foot brake is released?
YES >> GO TO 7.
NO >>

Mark the box AT- 1 7 9 , "Vehicle Does Not Creep Backward in “R” Position" on the AT- 3 8 , "DIAG-
NOSTIC WORKSHEET" .

Continue “Road Test”.
7. CHECK VEHICLE MOVE
Move selector lever to “D”, “3”, “2” and “1” positions and check if vehicle creeps forward.
Does vehicle creep forward in all four positions?
YES >> Go to AT- 5 0 , "Cruise Test — Part 1" .
NO >>

Mark the box AT- 1 8 1 , "Vehicle Does Not Creep Forward in “D”, “3”, “2” or “1” Position" on the
AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.

AT-50
TROUBLE DIAGNOSIS

Cruise Test — Part 1BCS00106
1. CHECK STARTING GEAR (D1 ) POSITION
1. Drive vehicle for approximately 10 minutes to warm engine oil and ATF up to operating temperature.
2. Park vehicle on flat surface.
3. Move selector lever to “P” position.
4. Start engine.
5. Move selector lever to “D” position.
6. Accelerate vehicle by constantly depressing accelerator pedal half-way.
Read gear position. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does vehicle start from D
1 ?
YES >> GO TO 2.
NO >>

Mark the box AT- 1 8 2 , "Vehicle Cannot Be Started From D1" on the AT- 3 8 , "DIAGNOSTIC
WORKSHEET" .

Continue “Road Test”.
2. CHECK SHIFT-UP (D1 TO D2 )
Check shift-up (D
1 to D2 ).
Specified speed when shifting from D
1 to D2 (Throttle position: half throttle). Refer to AT- 5 4 , "Vehicle Speed
Which Gear Shifting Occurs" .
Read gear position, throttle opening and vehicle speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
1 to D2 at the specified speed?
YES >> GO TO 3.
NO >>

Mark the box AT- 1 8 4 , "A/T Does Not Shift: D1 → D2 or Does Not Kickdown: D4 → D2" on the
AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.
3. CHECK SHIFT-UP (D2 TO D3 )
Check shift-up (D
2 to D3 ).
Specified speed when shifting from D
2 to D3 (Throttle position: half throttle). Refer to AT- 5 4 , "Vehicle Speed
Which Gear Shifting Occurs" .
Read gear position, throttle opening and vehicle speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
2 to D3 at the specified speed?
YES >> GO TO 4.
NO >>

Mark the box AT- 1 8 6 , "A/T Does Not Shift: D2 → D3" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
4. CHECK SHIFT-UP (D3 TO D4 )
Check shift-up (D
3 to D4 ).
Specified speed when shifting from D
3 to D4 (Throttle position: half throttle). Refer to AT- 5 4 , "Vehicle Speed
Which Gear Shifting Occurs" .
Read gear position, throttle opening and vehicle speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 5.
NO >>

Mark the box AT- 1 8 8 , "A/T Does Not Shift: D3 → D4" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”. ATF operating temperature: 50 - 80°C (122 - 176°F)

TROUBLE DIAGNOSIS
AT-51
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5. CHECK LOCK-UP (D4 TO D4 L/U)
Check lock-up (D
4 to D4 L/U).
Specified speed when lock-up occurs (Throttle position: half throttle). Refer to AT- 5 4 , "
Vehicle Speed at When
Lock-up Occurs/Releases" .
Read vehicle speed, throttle opening when lock-up duty becomes 94%. Refer to AT- 7 0 , "
DATA
MONITOR MODE" .
Does A/T perform lock-up at specified speed?
YES >> GO TO 6.
NO >>

Mark the box AT- 1 9 1 , "A/T Does Not Perform Lock-up" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
6. CHECK LOCK-UP HOLD
Check lock-up hold.
When lock-up duty becomes 94%. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T hold lock-up condition for more than 30 seconds?
YES >> GO TO 7.
NO >>

Mark the box AT- 1 9 3 , "A/T Does Not Hold Lock-up Condition" on the AT- 3 8 , "DIAGNOSTIC
WORKSHEET" .

Continue “Road Test”.
7. CHECK SHIFT-DOWN (D4 L/U TO D4 )
Release accelerator pedal.
When lock-up duty becomes 4%. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Is lock-up released when accelerator pedal is released?
YES >> GO TO 8.
NO >>

Mark the box AT- 1 9 5 , "Lock-up Is Not Released" on the AT- 3 8 , "DIAGNOSTIC WORKSHEET"
.

Continue “Road Test”.
8. CHECK SHIFT-DOWN (D4 TO D3 )
Decelerate vehicle by applying foot brake lightly.
Read gear position and engine speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does engine speed return to idle smoothly when A/T is shifted from D
4 to D3 ?
YES >> 1. Stop vehicle.
2. Go to AT- 5 1 , "
Cruise Test — Part 2" .
NO >>

Mark the box AT- 1 9 5 , "Engine Speed Does Not Return To Idle (Light Braking D4 → D3 )" on the
AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.
Cruise Test — Part 2BCS00107
1. CHECK STARTING GEAR (D1 ) POSITION
1. Move selector lever to “D” position.
2. Accelerate vehicle by half throttle again.
Read gear position. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does vehicle start from D
1 ?
YES >> GO TO 2.
NO >>

Mark the box AT- 1 8 2 , "Vehicle Cannot Be Started From D1" on the AT- 3 8 , "DIAGNOSTIC
WORKSHEET" .

Continue “Road Test”.

AT-52
TROUBLE DIAGNOSIS

2. CHECK SHIFT-UP AND SHIFT-DOWN (D3 TO D4 TO D2 )
1. Accelerate vehicle to 80 km/h (50 MPH).
2. Release accelerator pedal and then quickly depress it fully.
Read gear position and throttle opening. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
4 to D2 as soon as accelerator pedal is depressed fully?
YES >> GO TO 3.
NO >>

Mark the box AT- 1 8 4 , "A/T Does Not Shift: D1 → D2 or Does Not Kickdown: D4 → D2" on the
AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.
3. CHECK SHIFT-UP (D2 TO D3 )
Check shift-up (D
2 to D3 )
Specified speed when shifting from D
2 to D3 (Throttle position: full throttle). Refer to AT- 5 4 , "Vehicle Speed
Which Gear Shifting Occurs" .
Read gear position, throttle opening and vehicle speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
2 to D3 at the specified speed?
YES >> GO TO 4.
NO >>

Mark the box AT- 1 8 6 , "A/T Does Not Shift: D2 → D3" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
4. CHECK SHIFT-UP (D3 TO D4 ) AND ENGINE BRAKE
Release accelerator pedal after shifting from D
2 to D3 .
Read gear position, throttle opening and vehicle speed. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
3 to D4 and does vehicle decelerate by engine brake?
YES >> 1. Stop vehicle.
2. Go to AT- 5 2 , "
Cruise Test — Part 3" .
NO >>

Mark the box AT- 1 8 8 , "A/T Does Not Shift: D3 → D4" on the AT- 3 8 , "DIAGNOSTIC WORK-
SHEET" .

Continue “Road Test”.
Cruise Test — Part 3BCS00108
1. CHECK SHIFT-DOWN (D4 TO 33 )
1. More selector lever to “D” position.
2. Accelerate vehicle using half-throttle to D
4 .
3. Release accelerator pedal.
4. Move gear selector lever from “D” position to “3” position while driving in D
4 .
Read gear position. Refer to AT- 7 0 , "
DATA MONITOR MODE" .
Does A/T shift from D
4 to 33 ?
YES >> GO TO 2.
NO >>

Mark the box AT- 1 9 7 , "A/T Does Not Shift: D4 → 33 , When A/T Selector Lever “D” → “3”" on
the AT- 3 8 , "
DIAGNOSTIC WORKSHEET" .

Continue “Road Test”.