Infiniti FX35, FX50 (S51). Manual - part 1849

SHIFT CHANGE CONTROL

TM-203

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

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- 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

*1: Control valve with TCM is included in A/T assembly.

*2: With paddle shifter

Component Description

INFOID:0000000005250198

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

TM-257, "Description"

Input speed sensor 1

TM-255, "Description"

Input speed sensor 2

A/T fluid temperature sensor

TM-253, "Description"

Input clutch solenoid valve

TM-279, "Description"

Front brake solenoid valve

TM-281, "Description"

Direct clutch solenoid valve

TM-299, "Description"

High and low reverse clutch solenoid valve

TM-296, "Description"

Low brake solenoid valve

TM-297, "Description"

Anti-interlock solenoid valve

TM-278, "Description"

2346 brake solenoid valve

TM-298, "Description"

Line pressure solenoid valve

TM-277, "Description"

Torque converter clutch solenoid valve

TM-274, "Description"

ECM

EC-588, "System Description"

BCM

BCS-6, "System Description"

TM-204

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

SHIFT PATTERN CONTROL

SHIFT PATTERN CONTROL

ASC (ADAPTIVE SHIFT CONTROL)

ASC (ADAPTIVE SHIFT CONTROL) : System Diagram

INFOID:0000000005250199

ASC (ADAPTIVE SHIFT CONTROL) : System Description

INFOID:0000000005250200

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted via CAN communication line.

SYSTEM DESCRIPTION

ASC (Adaptive Shift Control)

It automatically selects the shift pattern (such as road environment and driving style) suitable for the various
situations so as to allow the vehicle to be driven efficiently and smoothly.

For example.....

• When driving on an up/down slope

JSDIA1364GB

Sensor

Input signal to TCM

TCM function

Actuator

Input speed sensor 1, 2

Input speed

Shift pattern 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)*

ABS actuator and electric unit 
(control unit)

Side G sensor signal*

BCM

Stop lamp switch signal*

SHIFT PATTERN CONTROL

TM-205

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

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ASC judges up/down slope according to engine torque data transmitted from the ECM and vehicle speed.
Fixing at 4GR, 5GR or 6GR on an up-slope prevents shift hunting and controls the vehicle to gain optimum
driving force. On a down-slope, automatic shift-down to 4GR, 5GR or 6GR controls to gain optimum engine
brake.

• When driving on a curve

TCM receives the side G sensor signal from the ABS actuator and electric unit (control unit). It locks to 4GR,
5GR or 6GR position in moderate cornering or to 3GR position in sharp cornering based on this signal. This
prevents any upshift and kickdown during cornering, maintaining smooth vehicle travel.

DS Mode

• Changes to the shift schedule that mainly utilizes the high engine speed zone when ASC is active.
• DS mode can be switched according to the following method.
- When the selector lever is in the “D” position, shifting the selector lever to manual shift gate enables switch-

ing to DS mode.

- When in DS mode, shifting the selector lever to the main gate enables to cancel DS mode.
- After switching to manual mode with paddle shifter, switching to DS mode can not be enabled even when the

selector lever is shifted to the manual gate. (With paddle shifter)

JSDIA1362GB

TM-206

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

SHIFT PATTERN CONTROL

ASC (ADAPTIVE SHIFT CONTROL) : Component Parts Location

INFOID:0000000005520215

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

1.

Selector lever position indicator

2.

A/T shift selector assembly

3.

A/T assembly connector

4.

Control valve with TCM

*1

5.

Accelerator pedal position sensor

6.

Manual mode indicator

7.

Shift position indicator

8.

A/T CHECK indicator lamp

9.

Paddle shifter (shift-down)

*2

10. Paddle shifter (shift-up)

*2

A.

Center console

B.

A/T assembly

C.

Accelerator pedal

D.

Combination meter

E.

Steering wheel

JSDIA0787ZZ