oil pressure NISSAN TIIDA 2009 Service Owner's Guide

CVT SYSTEM
CVT-205
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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

.
Fail-Safe INFOID:0000000004305589
The TCM has an electrical fail-safe mode. This mode make s it possible to operate even if there is an error in a
main electronic control input/output signal circuit.
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, th is function controls the CVT to make driving possible.
Output Speed Sensor (S econdary Speed Sensor)
The shift pattern is changed in accordance with thrott le position when an unexpected signal is sent from the
output speed sensor (secondary speed sensor) to the TCM. The overdrive-off mode is inhibited, and the tran-
saxle is put in “D”.
Input Speed Sensor (Primary Speed Sensor)
The shift pattern is changed in accordance with thro ttle position and secondary speed (vehicle speed) when
an unexpected signal is sent from the input speed sensor (primary speed sensor) to the TCM. The overdrive-
off mode is inhibited, and the transaxle is put in “D”.
PNP Switch
If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in “D”.
CVT Fluid Temperature Sensor
If an unexpected signal is sent from the CVT fluid temper ature sensor to the TCM, the gear ratio in use before
receiving the unexpected signal is maintained or t he gear ratio is controlled to keep engine speed under 3500
rpm.
Transmission Fluid Pressure Sensor A (Secondary Pressure Sensor)
• If an unexpected signal is sent from the transmission fluid pressure sensor A (secondary pressure sensor) to
the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the non-
standard condition occurs is used to control line pressure.
• If transmission fluid pressure sensor A (secondary pres sure sensor) error signal is input to TCM, secondary
pressure feedback control stops, but line pressure is controlled normally.
Pressure Control Solenoid A (Line Pressure Solenoid)
If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid A (line pressure
solenoid) is turned OFF to achieve the maximum fluid pressure.
Pressure Control Solenoid B (Secondary Pressure Solenoid)
If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid B (secondary pres-
sure solenoid) is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid
If an unexpected signal is sent from the solenoid to t he TCM, the torque converter clutch solenoid is turned
OFF to cancel the lock-up.
Step Motor
If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are
all turned OFF to hold the gear ratio used right before the non-standard condition occurred.
CVT Lock-up Select Solenoid Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

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

TROUBLE DIAGNOSIS
CVT-223
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Road Test
INFOID:0000000004305594
DESCRIPTION • The purpose of the test is to determine overall performance of CVT and analyze causes of problems.
• The road test consists of the following three parts:
1. “Check Before Engine Is Started” CVT-224 .
2. “Check at Idle” CVT-224 .
3. “Cruise Test” CVT-226 .
Judgement Possible cause
Idle speed Low for all positions
(“P”, “R”, “N”, “D”, “L”) Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
• Oil pump wear
• Pressure regulator valve or plug sticking or spring fatigue
• Oil strainer ⇒ oil pump ⇒ pressure regulator valve passage oil leak
• Engine idle speed too low
Only low for a specific
position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High Possible causes include a sensor malfunction or malfunction in the line pressure adjustment
function.
For example
• Accelerator pedal position signal malfunction
• CVT fluid temperature sensor malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (sticking in OFF state, filter
clog, cut line)
• Pressure regulator valve or plug sticking
Stall speed Line pressure does
not rise higher than
the line pressure for
idle. Possible causes include a sensor malfunction or malfunction in the pressure adjustment func-
tion.
For example
• Accelerator pedal position signal malfunction
• TCM malfunction
• Pressure control solenoid A (lin e pressure solenoid) malfunction (shorting, sticking in ON
state)
• Pressure regulator valve or plug sticking
The pressure rises,
but does not enter the
standard position. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Pressure control solenoid A (l ine pressure solenoid) malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
Only low for a specific
position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve. SAT786A

Malfunction Indicator Lamp (MIL) " .
*2: Models without ABS does not indicate.
DATA MONITOR MODE PRS CNT SOL/B
CIRC • Normal voltage not applied to solenoid due to cut line,
short, or the like
• TCM detects as irregular by comparing target value with
monitor value P0778 P0778
CVT-282TR PRS SENS/A
CIRC Signal voltage of the transmission fluid pressure sensor A
(secondary pressure sensor) is too high or too low while driv-
ing P0840 P0840
CVT-287PRESS SEN/
FNCTN Secondary fluid pressure is too high compared with the com-
manded value while driving P0841 —
CVT-291SEC/PRESS
DOWN Secondary fluid pressure is too low compared with the com-
manded value while driving P0868 —
CVT-293TCM-POWER
SUPPLY • When the power supply to the TCM is cut OFF, for example
because the battery is removed, and the self-diagnosis
memory function stops
• This is not a malfunction message (Whenever shutting OFF a power supply to the TCM, this message appears on
the screen) P1701 —
CVT-295TP SEN/CIRC A/T
TCM does not receive the proper accelerator pedal position
signals (input by CAN communication) from ECM P1705 —
CVT-299ESTM VEH SPD
SIG*2 • CAN communication with the
ABS actuator and the electric
unit (control unit) is malfunctioning
• There is a great difference between the vehicle speed sig- nal from the ABS actuator and the electric unit (control
unit), and the vehicle speed sensor signal P1722 —
CVT-301CVT SPD SEN/
FNCTN A rotation sensor error is detected because the gear does not
change in accordance with the position of the stepping motor
CAUTION:
One of the “P0720 VEH SPD SEN/CIR AT”, the “P0715 IN-
PUT SPD SEN/CIRC” or the “P0725 ENGINE SPEED SIG“
is displayed with the DTC at the same time P1723 —
CVT-303ELEC TH CON-
TROL The electronically controlled throttle for ECM is malfunction-
ing P1726 —
CVT-305LU-SLCT SOL/
CIRC • Normal voltage not applied to solenoid due to cut line,
short, or the like
• TCM detects as irregular by comparing target value with monitor value P1740 P1740
CVT-306L/PRESS CON-
TROL TCM detects the unexpected line pressure P1745 —
CVT-310STEP MOTR CIRC
Each coil of the step motor is not energized properly due to
an open or a short P1777 P1777
CVT-311STEP MOTR/FNC
There is a great difference between the number of steps for
the stepping motor and for the actual gear ratio P1778 P1778
CVT-315NO DTC IS DE-
TECTED: FUR-
THER TESTING
MAY BE RE-
QUIRED No NG item has been detected X X —
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

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DTC P0745 LINE PRESSURE SOLENOID VALVE
Description INFOID:0000000004305682
• The pressure control solenoid valve A (line pressure solenoid valve) is included in the control valve assem- bly.
• The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305683
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305684
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-III is detected under the following
conditions.
- TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM compares target value with monitor value and detects an irregularity.
Possible Cause INFOID:0000000004305685
• Harness or connectors (Solenoid circuit is open or shorted.)
• Pressure control solenoid valve A (Line pressure solenoid valve)
DTC Confirmation Procedure INFOID:0000000004305686
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and wait at least 5 seconds.
3. If DTC is detected, go to CVT-275, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
ISOLT2 Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A

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DTC P1777 STEP MOTOR - CIRCUIT
Description INFOID:0000000004305777
• The step motor is included in the control valve assembly.
• The step motor changes the step with turning 4 coils ON/OF F according to the signal from TCM. As a result,
the flow of line pressure to primary pu lley is changed and pulley ratio is controlled
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305778
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305779
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1777 STEP MOTR CIRC” with CONSULT-III is detected under the following con-
ditions.
- When operating step motor ON and OFF, there is no proper change in the voltage of TCM terminal which corresponds to it.
Possible Cause INFOID:0000000004305780
• Step motor
• Harness or connectors
(Step motor circuit is open or shorted.)
DTC Confirmation Procedure INFOID:0000000004305781
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESU LTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Drive vehicle for at least 5 consecutive seconds.
3. If DTC is detected, go to CVT-313, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
STM STEP
During driving−
20 step - 180 step
SMCOIL A
Changes ON⇔OFF.
SMCOIL B
SMCOIL C
SMCOIL D

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CONTENTS
DRIVER INFORMATION SYSTEM
SERVICE INFORMATION .. ..........................2
PRECAUTION ................................................ .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
COMBINATION METERS .............................. .....3
Component Parts and Harness Connector Loca-
tion ...................................................................... ......
3
System Description ............................................. ......3
Arrangement of Combination Meter .................... ......5
Internal Circuit ..................................................... ......6
Wiring Diagram - METER - ................................. ......7
Combination Meter Harness Connector Terminal
Layout ................................................................. ......
9
Terminal and Reference Value for Combination
Meter ................................................................... ......
9
Self-Diagnosis Mode of Combination Meter ........ ....10
CONSULT-III Function (METER/M&A) ............... ....12
Trouble Diagnosis ............................................... ....13
Symptom Chart ................................................... ....14
Power Supply and Ground Circuit Inspection ..... ....14
Vehicle Speed Signal Inspection ......................... ....15
Engine Speed Signal Inspection ......................... ....16
Fuel Level Sensor Signal Inspection ................... ....16
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies .................................................................. ....
18
Fuel Gauge Does Not Move to Full-position ...........18
DTC [U1000] CAN Communication Circuit ......... ....18
Electrical Component Inspection ......................... ....19
Removal and Installation .........................................19
WARNING LAMPS ......................................... ....20
Schematic ........................................................... ....20
Wiring Diagram - WARN - ................................... ....21 Oil Pressure Wa
rning Lamp Stays Off (Ignition
Switch ON) .......................................................... ....
29
Oil Pressure Wa rning Lamp Does Not Turn Off
(Oil Pressure Is Normal) ...................................... ....
31
Component Inspection ......................................... ....31
A/T INDICATOR ................................................ 33
System Description .............................................. ....33
Wiring Diagram - AT/IND - ................................... ....34
A/T Indicator Does Not Illuminate ........................ ....35
CVT INDICATOR ............................................... 37
System Description .............................................. ....37
Schematic ............................................................ ....37
Wiring Diagram - CVTIND - ................................. ....38
CVT Indicator Does Not Illuminate ...................... ....40
WARNING CHIME ............................................. 42
Component Parts and Harness Connector Loca-
tion ....................................................................... ....
42
System Description .............................................. ....42
Wiring Diagram - CHIME - ................................... ....45
Terminal and Reference Value for BCM ..................46
CONSULT-III Function (B CM) .................................46
Trouble Diagnosis ................................................ ....47
Combination Meter Buzzer Cir cuit Inspection .........48
Front Door Switch LH Signal Inspection .............. ....49
Key Switch Signal Inspec tion (Without Intelligent
Key) ..................................................................... ....
50
Key Switch and Ignition Knob Switch Signal In-
spection (With Intelligent Key, When Mechanical
Key Is Used) ........................................................ ....
51
Lighting Switch Signal Inspection ........................ ....53
Parking Brake Switch Signal Inspection .............. ....53
Electrical Component Inspection ......................... ....54

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NOTE:
Some items are not available due to vehicle specification.
*: The monitor will indicate “OFF” even though the brake warnin g lamp is on if either of the following conditions exist.
• The parking brake is engaged
• The brake fluid level is low
Trouble Diagnosis INFOID:0000000004307005
HOW TO PERFORM TROUBLE DIAGNOSIS 1. Confirm the symptom or customer complaint.
2. Perform preliminary check. Refer to "PRELIMINARY CHECK" .
3. According to the symptom chart, repair or replace the cause of the malfunction. Refer to DI-14, " Symptom
Chart " .
4. Does the meter operate normally? If so, GO TO 5. If not, GO TO 2.
5. Inspection End.
PRELIMINARY CHECK Self-Diagnosis Mode of Combination Meter " .
Does self - diagnosis mode operate?
YES >> GO TO 2.
TURN IND [ON/OFF] X Indicates [ON/O
FF] condition of turn indicator.
OIL W/L [ON/OFF] X Indicates [ON/OFF] condition of oil pressure warning lamp.
ABS W/L [ON/OFF] X Indicates [ON/O FF] condition of ABS warning lamp.
BRAKE W/L [ON/OFF] X Indicates [ON/OFF] condition of brake warning lamp.*
KEY G W/L [ON/OFF] X Indicates [ON/OFF] condition of KEY warning lamp (green).
KEY R W/L [ON/OFF] X Indicates [ON/OFF] condition of KEY warning lamp (red).
KEY KNOB W/L [ON/OFF] X Indicates [ON/OFF] condition of LOCK warning lamp.
PNP P SW [ON/OFF] X X Indicates [ON/OFF] condition of inhibitor P switch.
PNP N SW [ON/OFF] X X Indicates [ON/OFF] condition of inhibitor N switch.
O/D OFF SW [ON/OFF] X Indicates [ON/ OFF] condition of O/D OFF switch.
BRAKE SW [ON/OFF] X Indicates [ON/OFF] condition of parking brake switch.
P RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T or CVT shift P range indi-
cator.
R RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T or CVT shift R range indi-
cator.
N RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T or CVT shift N range indi-
cator.
D RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T or CVT shift D range indi-
cator.
2 RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift 2 range indicator.
L RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of CVT shift L range indicator.
1 RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift 1 range indicator.
CRUISE IND [ON/OFF] X Indicates [ON/O FF] condition of CRUISE indicator.
SET IND [ON/OFF] X Indicates [ON/OFF] condition of SET indicator.
O/D OFF W/L [ON/OFF] X Indicates [ON/OFF] condition of O/D OFF indicator lamp.
e-4WD W/L [ON/OFF] X This item is not used for this model. “OFF” is always displayed.
EPS W/L [ON/OFF] X Indicates [ON/O FF] condition of EPS warning lamp.
Display item [Unit]
MAIN
SIGNALS SELECTION
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