Infiniti FX35, FX50 (S51). Manual — part 1846

DIAGNOSIS AND REPAIR WORK FLOW

TM-191

< BASIC INSPECTION >

[7AT: RE7R01B (VK50VE)]

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Symptoms

†

Vehicle does not move (

†

Any position

†

Particular position )

†

No up-shift (

†

1GR

→

2GR

†

2GR

→

3GR

†

3GR

→

4GR

†

4GR

→

5GR

†

5GR

→

6GR

†

6GR

→

7GR)

†

No down-shift (

†

7GR

→

6GR

†

6GR

→

5GR

†

5GR

→

4GR

†

4GR

→

3GR

†

3GR

→

2GR

†

2GR

→

1GR)

†

Lock-up malfunction

†

Shift point too high or too low

†

Shift shock or slip

†

Noise or vibration

†

No kick down

†

No pattern select

†

Others

Frequency

†

All the time

†

Under certain conditions

†

Sometimes ( times a day)

Weather conditions

†

Not affected

Weather

†

Fine

†

Clouding

†

Raining

†

Snowing

†

Other ( )

Temp.

†

Hot

†

Warm

†

Cool

†

Cold

†

Temp. [Approx.

°

C (

°

F)]

Humidity

†

High

†

Middle

†

Low

Transmission conditions

†

Not affected

†

Cold

†

During warm-up

†

After warm-up

†

Engine speed ( rpm)

Road conditions

†

Not affected

†

In town

†

In suburbs

†

Freeway

†

Off road (Up / Down)

Driving conditions

†

Not affected

†

At starting

†

While idling

†

While engine racing

†

At racing

†

While cruis-

ing

†

While accelerating

†

While decelerating

†

While turning (Right / Left)

†

Vehicle speed [ km/h ( MPH)]

Other conditions

Question Sheet

TM-192

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

A/T CONTROL SYSTEM

SYSTEM DESCRIPTION

A/T CONTROL SYSTEM

System Diagram

INFOID:0000000005250187

System Description

INFOID:0000000005250188

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The A/T senses vehicle operating conditions through various sensors or signals. It always controls the opti-

mum shift position and reduces shifting and lock-up shocks.

• Receive input signals transmitted from various switches and sensors.
• Determine required line pressure, shifting point, lock-up operation, etc.
• Transmit required output signals to the respective solenoids.

JSDIA1473GB

Switch, Sensor or Signal

⇒

TCM function

⇒

Actuator

• Transmission range switch
• Accelerator pedal position sig-

nal

• Closed throttle position signal
• Wide open throttle position sig-

nal

• Engine speed signal
• A/T fluid temperature sensor
• Output speed sensor
• Vehicle speed signal
• Manual mode switch signal
• Stop lamp switch signal
• Side G sensor signal
• Input speed sensor 1, 2

• Line pressure control (

TM-195

)

• Shift change control (

TM-199

)

• Shift pattern control
- Shift pattern (

TM-204

)

- Manual mode (

TM-208

)

• Lock-up control (

TM-211

)

• Fail-safe control (

TM-328

)

• Self-diagnosis (

TM-243

)

• CONSULT-III communication line (

TM-

243

)

• CAN communication line (

TM-249

)

• Input clutch solenoid valve
• Direct clutch solenoid valve
• Front brake solenoid valve
• High and low reverse clutch solenoid

valve

• Low brake solenoid valve
• Torque converter clutch solenoid valve
• Line pressure solenoid valve
• Anti-interlock solenoid valve
• 2346 brake solenoid valve
• A/T CHECK indicator lamp
• Back-up lamp relay
• Starter relay

A/T CONTROL SYSTEM

TM-193

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

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Component Parts Location

INFOID:0000000005250189

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

TM-194

< SYSTEM DESCRIPTION >

[7AT: RE7R01B (VK50VE)]

A/T CONTROL SYSTEM

- 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:0000000005250190

*: With paddle shifter

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.

Transmission range switch

TM-252, "Description"

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"

Accelerator pedal position sensor

TM-282, "Description"

Manual mode switch

TM-290, "Description"

Paddle shifter*

Starter relay

TM-250, "Description"

A/T CHECK indicator lamp

When the ignition switch is pushed to the ON position, the light comes on for 2 seconds.

Stop lamp switch

TM-122, "Description"

ECM

EC-588, "System Description"

BCM

BCS-6, "System Description"

Unified meter and A/C amp.

MWI-6, "METER SYSTEM : System Description"

ABS actuator and electric unit (control unit)

BRC-29, "System Description"

Yaw rate/side G sensor

BRC-77, "Description"