Infiniti FX35, FX50 (S51). Manual — part 1802
LINE PRESSURE CONTROL
TM-15
< SYSTEM DESCRIPTION >
[7AT: RE7R01A (VQ35HR)]
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When the A/T fluid temperature drops below the prescribed tempera-
ture, in order to speed up the action of each friction element, the line
pressure is set higher than the normal line pressure characteristic.
Component Parts Location
INFOID:0000000005477008
PCIA0011E
1.
Selector lever position indicator
2.
A/T shift selector assembly
3.
A/T assembly connector
4.
Control valve with TCM*
5.
Accelerator pedal position sensor
6.
Manual mode indicator
7.
Shift position indicator
8.
A/T CHECK indicator lamp
JSDIA0782ZZ
TM-16
< SYSTEM DESCRIPTION >
[7AT: RE7R01A (VQ35HR)]
LINE PRESSURE CONTROL
NOTE:
• The following components are included in A/T shift selector assembly.
- Manual mode select switch
- Manual mode position select switch
- Shift position switch
• The following components are included in control valve with TCM.
- TCM
- Input speed sensor 1, 2
- Output speed sensor
- A/T fluid temperature sensor
- Transmission range switch
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Input clutch solenoid valve
- Front brake solenoid valve
- Low brake solenoid valve
- Anti-interlock solenoid valve
- 2346 brake solenoid valve
- Line pressure solenoid valve
- Torque converter clutch solenoid valve
*: Control valve with TCM is included in A/T assembly.
Component Description
INFOID:0000000005249997
A.
Center console
B.
A/T assembly
C.
Accelerator pedal
D.
Combination meter
Name
Function
TCM
The TCM consists of a microcomputer and connectors for signal input and output and
for power supply. The TCM controls the A/T.
Output speed sensor
Input speed sensor 1
Input speed sensor 2
A/T fluid temperature sensor
Line pressure solenoid valve
Pressure regulator valve
Adjusts the oil discharged from the oil pump to the optimum pressure (line pressure) for
the driving state.
ECM
SHIFT CHANGE CONTROL
TM-17
< SYSTEM DESCRIPTION >
[7AT: RE7R01A (VQ35HR)]
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SHIFT CHANGE CONTROL
System Diagram
INFOID:0000000005249998
System Description
INFOID:0000000005249999
INPUT/OUTPUT SIGNAL CHART
*: This signal is transmitted via CAN communication line.
SYSTEM DESCRIPTION
The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the
clutch pressure is adjusted to be appropriate to the engine load state and vehicle driving state. It becomes
JSDIA1346GB
Sensor
Input signal to TCM
TCM function
Actuator
Input speed sensor 1, 2
Input speed
Shift change control
• High and low reverse
clutch solenoid valve
• Direct clutch solenoid
valve
• Input clutch solenoid valve
• Low brake solenoid valve
• 2346 brake solenoid valve
• Front brake solenoid valve
• Torque converter clutch so-
lenoid valve
• Line pressure solenoid
valve
• Anti-interlock solenoid
valve
Output speed sensor
Vehicle speed
A/T fluid temperature sensor
ATF temperature
ECM
Engine speed signal*
Accelerator pedal position signal*
Closed throttle position signal*
Engine and A/T integrated control signal
(Engine torque)*
BCM
Stop lamp switch signal*
TM-18
< SYSTEM DESCRIPTION >
[7AT: RE7R01A (VQ35HR)]
SHIFT CHANGE CONTROL
possible to finely control the clutch hydraulic pressure with high precision and a smoother shift change charac-
teristic is attained.
Shift Change
The clutch is controlled with the optimum timing and oil pressure by the engine speed, engine torque informa-
tion, etc.
Shift Change System Diagram
*1: Full phase real-time feedback control monitors movement of gear ratio at gear change, and controls oil
pressure in real-time to achieve the best gear ratio.
Blipping Control
This system makes transmission clutch engage readily by controlling (synchronizing) engine revolution
according to the (calculation of) engine revolution after shifting down.
• “BLIPPING CONTROL” functions.
- When downshifting by accelerator pedal depression.
- When downshifting by the manual mode.
PCIA0012E
PCIA0013E
JSDIA0826GB
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