Nissan Teana J32. Instruction — part 1166
TM-188
< FUNCTION DIAGNOSIS >
[CVT: RE0F10A]
HYDRAULIC CONTROL SYSTEM
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:0000000003809652
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
• CVT fluid temperature sensor
1.
Sport mode switch
2.
Shift position indicator
3.
SPORT indicator lamp
4.
TCM
5.
Secondary speed sensor
6.
PNP switch
7.
Primary speed sensor
8.
Control valve assembly
*
9.
CVT unit connector
10. Accelerator pedal position sensor
A.
Center console
B.
Combination meter
C.
Engine room LH
D.
CVT assembly
E.
Accelerator pedal, upper
JPDIA0746ZZ
HYDRAULIC CONTROL SYSTEM
TM-189
< FUNCTION DIAGNOSIS >
[CVT: RE0F10A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
• Torque converter clutch solenoid valve
• Line pressure solenoid valve
• Step motor
• ROM assembly
• Secondary pressure sensor
• Secondary pressure solenoid valve
• Lock-up select solenoid valve
Component Description
INFOID:0000000003806357
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.
Instruction 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 the vehicle driving status according to the signal from each sensor and controls
the non-step transmission mechanism properly.
Accelerator pedal position sensor
TM-190
< FUNCTION DIAGNOSIS >
[CVT: RE0F10A]
CONTROL SYSTEM
CONTROL SYSTEM
System Diagram
INFOID:0000000003806358
System Description
INFOID:0000000003806359
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
JPDIA0744GB
SENSORS (or SIGNALS)
⇒
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
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
CONTROL SYSTEM
TM-191
< FUNCTION DIAGNOSIS >
[CVT: RE0F10A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
*1: Input via CAN communications.
*2: Output via CAN communications.
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
Control item
Fluid
pressure
control
Select con-
trol
Shift control
Lock-up
control
CAN com-
munication
control
Fail-safe
function
(
*
3)
Input
PNP switch
X
X
X
X
X
X
Accelerator pedal position signal
*1
X
X
X
X
X
X
Closed throttle position signal
*1
X
X
X
X
Engine speed signal
*1
X
X
X
X
X
CVT fluid temperature sensor
X
X
X
X
X
Sport mode switch signal
*1
X
X
X
X
Stop lamp switch signal
*1
X
X
X
X
Primary speed sensor
X
X
X
X
X
Secondary speed sensor
X
X
X
X
X
X
Secondary pressure sensor
X
X
X
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
SPORT indicator signal
*2
X
X
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