2003 NISSAN TEANA Selector

CVT SYSTEM
CVT-21
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CVT

NOTE:
The gear ratio is set for every position separately.
“D” POSITION
Shifting over all the ranges of gear ratios from the lowest to the high-
est.
“M” POSITION
When the selector lever is put in the manual shift gate side, the fixed
changing gear line is set. By moving the selector lever to + side or -
side, the manual mode switch is changed over, and shift change like
M/T becomes possible following the changing gear set line step by
step.
DOWNHILL ENGINE BRAKE CONTROL (AUTO ENGINE BRAKE CONTROL)
When downhill is detected with the accelerator pedal released, the engine brake will be strengthened up by
downshifting so as not to accelerate the vehicle more than necessary.
ACCELERATION CONTROL
According to vehicle speed and a change of accelerator pedal angle, driver's request for acceleration and driv-
ing scene are judged. This function assists improvement in acceleration feeling by making the engine speed
proportionate to the vehicle speed. And a shift map which can gain a larger driving force is available for com-
patibility of mileage with drivability.
Lock-up and Select ControlBCS001G7

The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to
increase power transmission efficiency.

The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid
valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or
releases the torque converter clutch piston.

When shifting between “N” (“P”) ⇔ “D” (“R”), torque converter clutch solenoid controls engagement power
of forward clutch and reverse brake.

The lock-up applied gear range was expanded by locking up the
torque converter at a lower vehicle speed than conventional
CVT models.
SCIA1953E
SCIA4582E
SCIA1958E

CVT-32
TROUBLE DIAGNOSIS

Inspections Before Trouble DiagnosisBCS001GJ
CVT FLUID CHECK
Fluid Leakage and Fluid Level Check
Inspect for fluid leakage and check the fluid level. Refer to CVT-13, "Checking CVT Fluid" .
Fluid Condition Check
Inspect the fluid condition.
STALL TEST
Stall Test Procedure
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle so that the
CVT fluid temperature is 50 to 80°C (122 to 176°F). Inspect the
amount of CVT fluid. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
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.
6. While holding down the foot brake, gradually press down the
accelerator pedal.
7. Quickly read off the stall speed, and then quickly remove your
foot from the accelerator pedal.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
8. Move the selector lever to the “N” position.
9. Cool down the CVT fluid.
Fluid status Conceivable cause Required operation
Varnished (viscous
varnish state)Clutch, brake
scorchedReplace the CVT fluid and check
the CVT main unit and the vehicle
for malfunctions (wire harnesses,
cooler pipes, etc.)
Milky white or
cloudyWater in the fluidReplace the CVT fluid and check for
places where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
CVTReplace the CVT fluid and check for
improper operation of the CVT.
SAT638A
SAT647B
SCIA7463E
Stall speed: 2,700 - 3,250 rpm
SAT514G

TROUBLE DIAGNOSIS
CVT-33
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CVT

CAUTION:
Run the engine at idle for at least 1 minute.
10. Repeat steps 6 through 9 with selector lever in “R” position.
Judgement Stall Test
O: Stall speed within standard value position.
H: Stall speed is higher than standard value.
L: Stall speed is lower than standard value.
LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the CVT fluid reaches in the range of 50 to 80°C
(122 to 176°F), then inspect the amount of CVT fluid and replenish if necessary.
NOTE:
The CVT fluid temperature rises in the range of 50 to 80°C (122 to 176°F) during 10 minutes of driv-
ing.
3. After warming up CVT, remove the oil pressure detection plug and install the oil pressure gauge. (Special
service tool: ST2505S001)
CAUTION:
When using the oil pressure gauge, be sure to use the O-ring attached to the oil pressure detec-
tion plug.
4. Securely engage the parking brake so that the tires do not turn.
Selector lever position
Expected problem location
“D” “R”
Stall rotation HO

Forward clutch
OH

Reverse brake
LL

Engine and torque converter one-way clutch
HH

Line pressure low

Primary pulley

Secondary pulley

Steel belt
SCIA1980E
SCIA7463E

TROUBLE DIAGNOSIS
CVT-37
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CVT

Check Before Engine Is StartedBCS001GL
1. CHECK CVT 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 CVT indicator lamp come on for about 2 seconds?
YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnosis and note NG items.
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
3. Go to CVT-37, "
Check at Idle" .
NO >> Stop “Road Test”. Go to CVT-164, "
CVT Indicator Lamp Does Not Come On" .
Check at IdleBCS001GM
1. CHECK STARTING THE ENGINE
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 CVT-27, "
DIAGNOSTIC WORKSHEET" . Go to CVT-165,
"Engine Cannot Be Started in “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch ON.
2. Move selector lever to “D”, “M” or “R” position.
3. Turn ignition switch to START position.
Is engine started?
YES >> Stop “Road Test”. Mark the box on the CVT-27, "DIAGNOSTIC WORKSHEET" . Go to CVT-165,
"Engine Cannot Be Started in “P” or “N” Position" .
NO >> GO TO 3.
3. CHECK “P” POSITION FUNCTION
1. Move selector lever to “P” position.
2. Turn ignition switch OFF.
3. Release parking brake.
4. Push vehicle forward or backward.
5. Apply parking brake.
Does vehicle move when it is pushed forward or backward?
YES >> Mark the box CVT-166, "In “P” Position, Vehicle Moves Forward or Backward When Pushed" on
the CVT-27, "
DIAGNOSTIC WORKSHEET" . Continue “Road Test”.
NO >> GO TO 4.

CVT-38
TROUBLE DIAGNOSIS

4. CHECK “N” POSITION FUNCTION
1. Start engine.
2. Move selector lever to “N” position.
3. Release parking brake.
Does vehicle move forward or backward?
YES >> Mark the box CVT-166, "In “N” Position, Vehicle Moves" on the CVT-27, "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 CVT-167, "Large Shock “N” → “R” Position" on the CVT-27, "DIAGNOSTIC WORK-
SHEET" . Continue “Road Test”.
NO >> GO TO 6.
6. CHECK “R” POSITION FUNCTION
Release foot brake for several seconds.
Does vehicle creep backward when foot brake is released?
YES >> GO TO 7.
NO >> Mark the box CVT-168, "
Vehicle Does Not Creep Backward in “R” Position" on the CVT-27,
"DIAGNOSTIC WORKSHEET" . Continue “Road Test”.
7. CHECK “D” POSITION FUNCTION
Move selector lever to “D” position and check if vehicle creeps forward.
Does vehicle creep forward in
“D” position?
YES >> Go to CVT-38, "Cruise Test" .
NO >> Mark the box CVT-169, "
Vehicle Does Not Creep Forward in “D” Position" on the CVT-27, "DIAG-
NOSTIC WORKSHEET" . Continue “Road Test”.
Cruise TestBCS001GN
1. CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 1
1. Drive vehicle for approximately 10 minutes to warm engine oil and CVT fluid 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 to 2/8-way throttle depressing accelerator
pedal constantly.
Read vehicle speed and engine speed. Refer to CVT-40,
"Vehicle Speed at Which Gear Shifting Occurs" .
OK or NG
OK >> GO TO 2.
NG >> Mark the box of CVT-170, "
CVT Does Not Shift" on the
CVT-27, "
DIAGNOSTIC WORKSHEET" . Continue
“Road Test”. CVT fluid operating temperature: 50 - 80°C (122 - 176°F)
SCIA6644E

TROUBLE DIAGNOSIS
CVT-39
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CVT

2. CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 2
1. Park vehicle on flat surface.
2. Move selector lever to “D” position.
3. Accelerate vehicle to full depression depressing accelerator
pedal constantly.
Read vehicle speed and engine speed. Refer to CVT-40,
"Vehicle Speed at Which Gear Shifting Occurs" .
OK or NG
OK >> GO TO 3.
NG >> Mark the box of CVT-170, "
CVT Does Not Shift" on the
CVT-27, "
DIAGNOSTIC WORKSHEET" . Continue
“Road Test”.
3. CHECK MANUAL MODE FUNCTION
Move to manual mode from “D” position.
Does it switch to manual mode?
YES >> GO TO 4.
NO >> Mark the box of CVT-171, "
Cannot Be Changed to Manual Mode" on the CVT-27, "DIAGNOSTIC
WORKSHEET" . Continue “Road Test”.
4. CHECK SHIFT-UP FUNCTION
During manual mode driving, is upshift from M1 → M2 → M3 → M4 → M5 → M6 performed?
Read the gear position. Refer to CVT-50, "
DATA MONITOR MODE" .
Is upshifting correctly performed?
YES >> GO TO 5.
NO >> Mark the box of CVT-171, "
CVT Does Not Shift in Manual Mode" on the CVT-27, "DIAGNOSTIC
WORKSHEET" . Continue “Road Test”.
5. CHECK SHIFT-DOWN FUNCTION
During manual mode driving, is downshift from M6 → M5 → M4 → M3 → M2 → M1 performed?
Read the gear position. Refer to CVT-50, "
DATA MONITOR MODE" .
Is downshifting correctly performed?
YES >> GO TO 6.
NO >> Mark the box of CVT-171, "
CVT Does Not Shift in Manual Mode" on the CVT-27, "DIAGNOSTIC
WORKSHEET" . Continue “Road Test”.
6. CHECK ENGINE BRAKE FUNCTION
Check engine brake.
Does engine braking effectively reduce speed in M1 position?
YES >> 1. Stop the vehicle.
2. Perform self-diagnosis. Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
NO >> Mark the box of CVT-172, "
Vehicle Does Not Decelerate by Engine Brake" on the CVT-27,
"DIAGNOSTIC WORKSHEET" . then continue trouble diagnosis.
SCIA4366E

CVT-40
TROUBLE DIAGNOSIS

Vehicle Speed at Which Gear Shifting OccursBCS001GO
Numerical value data are reference values.
CAUTION:
Lock-up clutch is engaged when vehicle speed is approximately 18 km/h (11 MPH) to 90 km/h (56 MPH).
TCM Input/Output Signal Reference ValuesBCS001GP
TCM TERMINAL CONNECTOR LAYOUT
TCM INSPECTION TABLE
Data are reference values and are measured between each terminal and ground.
Engine type Throttle position Shift patternEngine speed (rpm)
At 40 km/h (25 MPH) At 60 km/h (37 MPH)
VQ35DE8/8 “D” position 3,100 - 4,300 4,200 - 5,300
2/8 “D” position 1,200 - 2,000 1,300 - 2,100
SCIA0495E
TerminalWire
colorItem Condition Data (Approx.)
1R/YPressure control sole-
noid valve A (Line pres-
sure solenoid valve)
and Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 1.0 V
2W/BPressure control sole-
noid valve B (Second-
ary pressure solenoid
valve) Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 3.0 - 4.0 V
3GTorque converter clutch
solenoid valveWhen vehicle
cruises in “D”
position.When CVT performs lock-up. 6.0 V
When CVT does not perform lock-up. 1.5 V
4LLock-up select solenoid
valveSelector lever in “P”, “N” positions. Battery voltage
Wait at least for 5 seconds with the selector lever in
“R”, “D” positions.0 V
5 L CAN-H — —
6 P CAN-L — —
8 G Back-up lamp relaySelector lever in “R” position. 0 V
Selector lever in other positions. Battery voltage
10 Y Power supply— Battery voltage
—0 V

TROUBLE DIAGNOSIS
CVT-41
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CVT

11 G/R Step motor A Within 2 seconds after ignition switch ON, the time measurement by
using the pulse width measurement function (Hi level) of CONSULT-
II.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle diagnosis
connector.
*1: A circuit tester cannot be used to test this item.30.0 msec
12 O/B Step motor B10.0 msec
13 G/W ROM assembly — —
14 L/R ROM assembly — —
15 BR/R ROM assembly — —
19 Y Power supply— Battery voltage
—0 V
20 R Step motor C Within 2 seconds after ignition switch ON, the time measurement by
using the pulse width measurement function (Hi level) of CONSULT-
II.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle diagnosis
connector.
*1: A circuit tester cannot be used to test this item.30.0 msec
21 R/G Step motor D10.0 msec
24 R/B Starter relaySelector lever in “N”, “P”positions. Battery voltage
Selector lever in other positions. 0 V
25 B Ground Always 0 V
27 BR/W PNP switch 1Selector lever in “R”, “N” and “D” positions. 0 V
Selector lever in “P” position. Battery voltage
28 Y/RPower supply
(memory back-up)Always Battery voltage
29 LG/ROutput speed sensor
(Secondary speed sen-
sor)When driving [“D” position, 20 km/h (12 MPH)]. 400 Hz
31 O K-LINE — —
32 GR PNP switch 3 (monitor)Selector lever in “D” position. 0 V
Selector lever in “P”, “R” and “N” positions.8.0 V - Battery
voltage
34 P/B PNP switch 2Selector lever in “N”, “D” positions. 0 V
Selector lever in “P”, “R” positions.10.0 V - Battery
voltage
35 P/L PNP switch 3Selector lever in “D” position. 0 V
Selector lever in “P”, “R” and “N” positions.8.0 V - Battery
voltage
36 G/O PNP switch 4Selector lever in “R”, “D” positions. 0 V
Selector lever in “P”, “N” positions.10.0 V - Battery
voltage TerminalWire
colorItem Condition Data (Approx.)