Nissan Teana J32. Manual — part 1124
TM-20
< FUNCTION DIAGNOSIS >
[CVT: RE0F09B]
HYDRAULIC CONTROL SYSTEM
HYDRAULIC CONTROL SYSTEM
System Diagram
INFOID:0000000003848924
System Description
INFOID:0000000003848925
The hydraulic control mechanism consists of the oil pump directly driven by the engine, the hydraulic control
valve that controls line pressure and transmission, and the input signal line.
LINE PRESSURE AND SECONDARY PRESSURE CONTROL
• When an input torque signal equivalent to the engine driving force is transmitted from the ECM to the TCM,
the TCM controls the line pressure solenoid valve and secondary pressure solenoid valve.
• Line pressure solenoid valve activates pressure regulator valve, and line pressure from oil pump is adjusted
for the optimum driving condition. Secondary pressure is controlled by lowering line pressure.
JPDIA0589GB
SCIA1846E
HYDRAULIC CONTROL SYSTEM
TM-21
< FUNCTION DIAGNOSIS >
[CVT: RE0F09B]
C
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TM
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Normal Control
Optimize the line pressure and secondary pressure, depending 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
For the normal fluid control and the select fluid control, secondary pressure is detected for feedback control by
using a secondary pressure sensor to set a high-precision secondary pressure.
Component Parts Location
INFOID:0000000003848926
*1: Primary pressure sensor is included in CVT assembly.
*2: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (7).
• PNP switch
1.
Sport mode switch
2.
Shift position indicator
3.
SPORT indicator lamp
4.
TCM
5.
Secondary speed sensor
6.
Primary pressure sensor
*1
7.
Control valve assembly
*2
8.
CVT unit connector
9.
Accelerator pedal position sensor
A.
Control device
B.
Combination meter
C.
Engine room LH
D.
CVT assembly
E.
Accelerator pedal, upper
JPDIA0747ZZ
TM-22
< FUNCTION DIAGNOSIS >
[CVT: RE0F09B]
HYDRAULIC CONTROL SYSTEM
• Primary speed sensor
• Step motor
• Secondary pressure solenoid valve
• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Shift control valve
• Secondary valve
• Manual valve
• Lock-up select solenoid valve
• CVT fluid temperature sensor
• Secondary pressure sensor
• ROM assembly
Component Description
INFOID:0000000003848927
TRANSAXLE ASSEMBLY
EXCEPT TRANSAXLE ASSEMBLY
Name
Function
Torque converter regulator valve
Optimizes the supply pressure for the torque converter depending on driving conditions.
Pressure regulator valve
Optimizes the discharge pressure from the oil pump depending on driving conditions.
TCC control valve
• Activates or deactivates the lock-up.
• Locks up smoothly by opening lock-up operation excessively.
Shift control valve
Controls inflow/outflow of line pressure from the primary pulley depending on the stroke
difference between the stepping motor and the primary pulley.
Secondary valve
Controls the line pressure from the secondary pulley depending on operating conditions.
Clutch regulator valve
Adjusts the clutch operating pressure depending on operating conditions.
Manual valve
Transmits the clutch operating pressure to each circuit in accordance with the selected
position.
Select control valve
Engages forward clutch, reverse brake smoothly depending on select operation.
Select switch valve
The select switch valve enables to select engagement/disengagement of lock-up clutch
and that of forward clutch and reverse clutch.
TCC solenoid valve
Secondary pressure solenoid valve
Line pressure solenoid valve
Step motor
Lock-up select solenoid valve
Primary speed sensor
Secondary speed sensor
PNP switch
Primary pulley
Secondary pulley
Forward clutch
Torque converter
Name
Function
TCM
Judges driving condition according to signals from each sensor, and optimally controls
variable speed mechanism.
Accelerator pedal position sensor
CONTROL SYSTEM
TM-23
< FUNCTION DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
CONTROL SYSTEM
System Diagram
INFOID:0000000003848928
System Description
INFOID:0000000003848929
The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.
TCM FUNCTION
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.
INPUT/OUTPUT SIGNAL OF TCM
JPDIA0809GB
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
Sport mode switch signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Primary pressure 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 communication 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
SPORT indicator lamp
Shift position indicator
Stater relay
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