Infiniti FX35, FX50 (S51). Manual - part 1804

 

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Infiniti FX35, FX50 (S51). Manual - part 1804

 

 

SHIFT PATTERN CONTROL

TM-23

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

C

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G

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A

B

TM

N

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P

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.

JSDIA1362GB

TM-24

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

SHIFT PATTERN CONTROL

ASC (ADAPTIVE SHIFT CONTROL) : Component Parts Location

INFOID:0000000005477010

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

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

A.

Center console

B.

A/T assembly

C.

Accelerator pedal

D.

Combination meter

JSDIA0782ZZ

SHIFT PATTERN CONTROL

TM-25

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

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- 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.

ASC (ADAPTIVE SHIFT CONTROL) : Component Description

INFOID:0000000005250005

MANUAL MODE

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-76, "Description"

Input speed sensor 1

TM-74, "Description"

Input speed sensor 2

A/T fluid temperature sensor

TM-72, "Description"

Input clutch solenoid valve

TM-100, "Description"

Front brake solenoid valve

TM-102, "Description"

Direct clutch solenoid valve

TM-117, "Description"

High and low reverse clutch solenoid valve

TM-114, "Description"

Low brake solenoid valve

TM-115, "Description"

Anti-interlock solenoid valve

TM-98, "Description"

2346 brake solenoid valve

TM-116, "Description"

Line pressure solenoid valve

TM-97, "Description"

Torque converter clutch solenoid valve

TM-94, "Description"

ECM

EC-30, "System Description"

BCM

BCS-6, "System Description"

ABS actuator and electric unit (control unit)

BRC-29, "System Description"

TM-26

< SYSTEM DESCRIPTION >

[7AT: RE7R01A (VQ35HR)]

SHIFT PATTERN CONTROL

MANUAL MODE : System Diagram

INFOID:0000000005250006

MANUAL MODE : System Description

INFOID:0000000005250007

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted via CAN communication line.

SYSTEM DESCRIPTION

Manual Mode

• The TCM receives the manual mode signal, non-manual mode signal, manual mode shift up signal and

manual mode shift down signal from unified meter and A/C amp. via CAN communication line. The TCM
shifts shift pattern control to the manual mode based on these signals, and then shifts the A/T by operating
each solenoid valve according to the shift operation of the driver.

• The TCM prohibits the manual mode while being in fail-safe mode due to an A/T malfunction, etc. Refer to

TM-146, "Fail-Safe"

.

• The TCM transmits the manual mode shift refusal signal to the unified meter and A/C amp. if the TCM

refuses the transmission from the driving status of vehicle when the selector lever shifts to UP or DOWN
side. The unified meter and A/C amp. blinks shift indicator on the combination meter and sounds the buzzer
to indicate the driver that the shifting is not performed when receiving this signal. However, the TCM does
not transmit the manual mode shift refusal signal in the conditions as per the following.

JSDIA1409GB

Sensor

Input signal to TCM

TCM function

Actuator

Output speed sensor

Vehicle 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 sole-

noid valve

• Line pressure solenoid valve
• Anti-interlock solenoid valve

A/T fluid temperature sensor

ATF temperature

ECM

Engine speed signal*

Accelerator pedal position signal*

Unified meter and A/C amp.

Manual mode signal*

Non-manual mode signal*

Manual mode shift up signal*

Manual mode shift down signal*

 

 

 

 

 

 

 

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