2009 NISSAN TIIDA brake fluid

CVT SYSTEM
CVT-203
< SERVICE INFORMATION >
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Hydraulic Control System
INFOID:0000000004305575
TCM Function INFOID:0000000004305576
The function of the TCM is to:
• Receive input signals sent from various switches and sensors.
• Determine required line pressure, shifting point, and lock-up operation.
• Send required output signals to the step motor and the respective solenoids.
CONTROL SYSTEM OUTLINE The CVT senses vehicle operating conditions through vari ous sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks. SCIA1807E
SENSORS (or SIGNAL)
⇒TCM
⇒ACTUATORS
PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Overdrive control signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Secondary pressure sensor Shift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-III co mmunication
line
Duet-EA control
CAN system
On board diagnosis Step motor
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid
valve
Shift position indicator
O/D OFF indicator lamp
Starter relay

CVT SYSTEM
CVT-205
< SERVICE INFORMATION >
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*1: Input by CAN communications.
*2: Output by CAN communications.
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
Line Pressure and Secondary Pressure Control INFOID:0000000004305579
• When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM
controls the line pressure solenoid valve and secondary pressure solenoid valve.
• This line pressure solenoid controls the pressure regulat or valve as the signal pressure and adjusts the pres-
sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving
state. Secondary pressure is cont rolled by decreasing line pressure.
NORMAL CONTROL Optimize the line pressure and secondary pressure, dependi ng on driving conditions, on the basis of the throt-
tle position, the engine speed, the primary pulley (input ) revolution speed, the secondary pulley (output) revo-
lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, and the fluid pressure.
FEEDBACK CONTROL When controlling the normal fluid pressure or the sele cted fluid pressure, the secondary pressure can be set
more accurately by using the fluid pressure sensor to detect the secondary pressure and controlling the feed-
back.
Shift Control INFOID:0000000004305580
In order to select the gear ratio which can obtain the dr iving force in accordance with driver's intention and the
vehicle condition, TCM monitors the driving conditions, such as the vehicle speed and the throttle position and
selects the optimum gear ratio, and determines the gear change steps to the gear ratio. Then send the com-
Out-
put Step motor X X
TCC solenoid valve X X X
Lock-up select solenoid valve X X X
Line pressure solenoid valve X X X X
Secondary pressure solenoid valve X X X
O/D OFF indicator signal (*2)
X X
Control item
Fluid
pressure
control Select con-
trol Shift control
Lock-up
control CAN com-
munication
control Fail-safe
function
(*3) SCIA1846E

CVT-220< SERVICE INFORMATION >
[RE0F08B]
TROUBLE DIAGNOSIS
• Inspect for fluid leakage and check the fluid level. Refer to CVT-196, " 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 wa rm 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.Fluid status Conceivable cause Required operation
Varnished (viscous
varnish state) Clutch, brake
scorched Replace the CVT fluid and check the
CVT main unit and the vehicle for
malfunctions (wire harnesses, cool-
er pipes, etc.)
Milky white or
cloudy Water in the fluidReplace the CVT fluid and check for
places where water is getting in.
Large amount of
metal powder mixed
in Unusual wear of
sliding parts within
CVT Replace the CVT fluid and check for
improper operation of the CVT. SAT638A
SAT647B
SAT513G
SAT775B

TROUBLE DIAGNOSIS
CVT-221
< SERVICE INFORMATION >
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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 accelerat or 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. 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: Stall speed:
CVT-357, " Stall Speed "
SAT514G
SAT771B
Selector lever position
Expected problem location
“D” “R”
Stall rotation H O • Forward clutch
O H • Reverse brake L L • Engine and torque converter one-way clutch
H H • Line pressure low
• Primary pulley
• Secondary pulley
• Steel belt SCIA6184E

CVT-222< SERVICE INFORMATION >
[RE0F08B]
TROUBLE DIAGNOSIS
The CVT fluid temperature rises in the range of 50 - 80 °C (122 - 176 °F) during 10 minutes of driving.
3. After warming up CVT, remove the oil pressure detection plug and install the oil pressure gauge [special service tool: - (OTC3492)].
CAUTION:
When using the oil pressure gauge, be sure to u se the O-ring attached to the oil pressure detec-
tion plug.
4. Securely engage the parking brake so that the tires do not turn.
5. Start the engine, and then measure the line pressure at both idle and the stall speed.
CAUTION:
• Keep the brake pedal pressed all the way down during
measurement.
• When measuring the line pressure at the stall speed, refer
to "STALL TEST" .
6. After the measurements are complete, install the oil pressure detection plug and tighten to the specified torque below.
CAUTION:
• Do not reuse O-ring.
• Apply CVT fluid to O-ring.
Line Pressure
Judgement of Line Pressure Test SAT513G
: 7.5 N·m (0.77 kg-m, 66 in-lb)
SAT493G
Engine speed
Line pressure kPa (kg/cm
2
, psi)
“R”, “D” and “L” positions
At idle CVT-357, " Line Pressure "
At stall

CVT
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PRI SPEED SEN During driving (lock-up ON) A
pproximately matches the engine speed.
ENG SPEED SIG Engine running Closely matches the tachometer reading.
SEC HYDR SEN “N” position idle 1.0 V
ATF TEMP SEN When CVT fluid temperature is 20
°C (68 °F). 2.0 V
When CVT fluid temperature is 80 °C (176 °F). 1.0 V
VIGN SEN Ignition switch: ON Battery voltage
VEHICLE SPEED During driving Approximately matches the speedometer
reading.
PRI SPEED During driving (lock-up ON) App roximately matches the engine speed.
SEC SPEED During driving 50 X Approximately matches the speedom-
eter reading.
ENG SPEED Engine running Closely matches the tachometer reading.
GEAR RATIO During driving 2.56 - 0.43
ACC PEDAL OPEN Released accelerator pedal - Fully depressed
accelerator pedal 0.0/8 - 8.0/8
SEC PRESS “N” position idle 0.8 MPa
STM STEP During driving −20 step - 180 step
ISOLT1 Lock-up OFF 0.0 A
Lock-up ON 0.7 A
ISOLT2 Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A
ISOLT3 Secondary pressure low - Secondary pressure
high. 0.8 - 0.0 A
SOLMON1 Lock-up OFF 0.0 A
Lock-up ON 0.7 A
SOLMON2 “N” position idle 0.8 A
When stalled 0.3 - 0.6 A
SOLMON3 “N” position idle 0.6 - 0.7 A
When stalled 0.4 - 0.6 A
P POSITION SW Selector lever in “P” position ON
Other than the above position OFF
R POSITION SW Selector lever in “R” position ON
Other than the above position OFF
N POSITION SW Selector lever in “N” position ON
Other than the above position OFF
D POSITION SW Selector lever in “D” position ON
Other than the above position OFF
L POSITION SW Selector lever in “L” position ON
Other than the above position OFF
BRAKE SW Depressed brake pedal ON
Released brake pedal OFF
FULL SW Fully depressed accelerator pedal ON
Released accelerator pedal OFF
IDLE SW Released accelerator pedal ON
Fully depressed accelerator pedal OFF
Item name Condition Display value (Approx.)

Item name Description
ENGINE BRAKE ADJ. The engine brake level setting can be canceled.
CONFORM CVTF DETERIORTN The CVT fluid deterioration level can be checked.

CVT
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CAUTION:
Touch “CLEAR” after changing CVT fluid, and then erase “CVTF DETERIORATION DATE”.
SELF-DIAGNOSTIC RESULT MODE After performing self-diagnosis, place check marks for results on the CVT-213, " How to Perform Trouble Diag-
nosis for Quick and Accurate Repair " . Reference pages are provided following the items.
Display Items List X: Applicable —: Not applicable
Less than 210000:
It is not necessary to change CVT fluid.
“CVTF DETERIORATION DATE”
Items (CONSULT-
III screen terms) Malfunction is detected when... TCM self-di-
agnosis OBD-III (DTC)
Reference page
“TRANSMIS-
SION” with
CONSULT-III MIL indicator
lamp*1, “EN- GINE” with
CONSULT-III
or GST
CAN COMM CIR-
CUIT When TCM is not transmitting or receiving CAN communica-
tion signal for 2 seconds or more U1000 U1000
CVT-238CONTROL
UNIT(CAN) When detecting error during the initial diagnosis of CAN con-
troller of TCM U1010 U1010
CVT-241BRAKE SW/CIRC When the brake switch does not switch to ON or OFF P0703 —
CVT-242PNP SW/CIRC
When TCM does not receive the the correct voltage signal
(based on the gear position) from the switch P0705 P0705
CVT-244ATF TEMP SEN/
CIRC During running, the CVT fluid temperature sensor signal volt-
age is excessively high or low P0710 P0710
CVT-249INPUT SPD SEN/
CIRC • Input speed sensor (primary speed sensor) signal is not in-
put due to an open circuit
• An unexpected signal is input when vehicle is being driven P0715 P0715
CVT-254VEH SPD SEN/
CIR AT • Signal from vehicle speed sensor CVT [Output speed sen-
sor (Secondary speed sensor)] not input due to open or
short circuit
• Unexpected signal input during running P0720 P0720
CVT-258ENGINE SPEED
SIG • TCM does not receive the CAN communication signal from
the ECM
• Engine speed is too low while driving P0725 —
CVT-263BELT DAMG Unexpected gear ratio detected P0730 —
CVT-265TCC SOLENOID/
CIRC Normal voltage not applied to solenoid due to open or short
circuit P0740 P0740
CVT-266A/T TCC S/V
FNCTN • CVT cannot perform lock-up even if electrical circuit is good
• TCM detects as irregular by comparing difference value with slip rotation
• There is big difference engine speed and primary speed
when TCM lock-up signal is on P0744 P0744
CVT-271L/PRESS SOL/
CIRC • Normal voltage not applied to solenoid due to open or short
circuit
• TCM detects as irregular by comparing target value with
monitor value P0745 P0745
CVT-273PRS CNT SOL/A
FCTN Unexpected gear ratio was detected in the LOW side due to
excessively low line pressure P0746 P0746
CVT-278PRS CNT SOL/B
FCTN Secondary pressure is too high or too low compared with the
commanded value while driving P0776 P0776
CVT-280