Infiniti EX37. Transaxle and Transmission (2013 year). Manual - part 2

SHIFT CHANGE CONTROL

TM-17

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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• TCM selects “BLIPPING CONTROL” or “NORMAL SHIFT CONTROL” according to the gear position, the

selector lever position, the engine torque and the speed when accelerating by pedal depression.

• Engine speed control demand signal is transmitted from TCM to ECM under “BLIPPING CONTROL”.
• ECM synchronizes the engine speed according to the engine speed control demand signal.

Downshifting by accelerator pedal depression

Downshifting by the manual mode and On shift-down operation by ASC at high speed side

JSDIA0815GB

JSDIA0817GB

2013 EX

TM-18

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT CHANGE CONTROL

Component Parts Location

INFOID:0000000008285743

1.

IPDM E/R
Refer to 

PCS-4, "Component Parts 

Location"

.

2.

ECM
Refer to 

EC-39, "Component Parts 

Location"

.

3.

BCM
Refer to 

BCS-9, "Component Parts 

Location"

.

4.

Accelerator pedal position sensor
Refer to 

EC-39, "Component Parts 

Location"

.

5.

Stop lamp switch
Refer to 

TM-60, "Component Parts 

Location"

.

6.

ABS actuator and electric unit (con-
trol unit)
Refer to 

BRC-13, "Component Parts 

Location"

.

7.

A/T CHECK indicator lamp
(On the combination meter)

8.

Shift position indicator
(On the combination meter)

9.

Yaw rate/side G sensor
Refer to 

BRC-13, "Component Parts 

Location"

.

10. Unified meter and A/C amp.

Refer to 

MWI-10, "METER SYSTEM 

: Component Parts Location"

.

11.

Joint connector

12. Output speed sensor

*1

13. Control valve & TCM

*2

14. Manual mode position select switch 

(shift-up)

15. Manual mode select switch

16. Manual mode position select switch 

(shift-down)

17. Shift position switch

18. Selector lever position indicator

A.

A/T assembly

B.

A/T shift selector assembly

C.

Center console

*1: Output speed sensor is installed in A/T assembly.

*2: Control valve & TCM is installed in A/T assembly.

JSDIA2909GB

2013 EX

SHIFT CHANGE CONTROL

TM-19

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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NOTE:

The following components are included in control valve & TCM.

• TCM

• Input speed sensor 1, 2

• 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

Component Description

INFOID:0000000008285744

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-80, "Description"

Input speed sensor 1

TM-78, "Description"

Input speed sensor 2

A/T fluid temperature sensor

TM-76, "Description"

Input clutch solenoid valve

TM-104, "Description"

Front brake solenoid valve

TM-107, "Description"

Direct clutch solenoid valve

TM-122, "Description"

High and low reverse clutch solenoid valve

TM-119, "Description"

Low brake solenoid valve

TM-120, "Description"

Anti-interlock solenoid valve

TM-103, "Description"

2346 brake solenoid valve

TM-121, "Description"

Line pressure solenoid valve

TM-102, "Description"

Torque converter clutch solenoid valve

TM-98, "Description"

ECM

EC-39, "System Description"

BCM

BCS-8, "System Description"

2013 EX

TM-20

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT PATTERN CONTROL

SHIFT PATTERN CONTROL

ASC (ADAPTIVE SHIFT CONTROL)

ASC (ADAPTIVE SHIFT CONTROL) : System Diagram

INFOID:0000000008285745

ASC (ADAPTIVE SHIFT CONTROL) : System Description

INFOID:0000000008285746

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted via CAN communication line.

SYSTEM DESCRIPTION

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.

When Driving on an Up/Down Slope

• 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

JSDIA1348GB

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*

2013 EX

SHIFT PATTERN CONTROL

TM-21

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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driving force. On a down-slope, automatic shift-down to 4GR, 5GR or 6GR gear controls to gain optimum
engine brake.

When Driving on a Curve

• In driving condition where acceleration, deceleration, or lateral acceleration continues, it corrects gear selec-

tion in order to keep a smooth vehicle speed during the curve and to give an adequate driving force at the
curve end.

- When acceleration pedal is quickly released at curve entrance etc, it prevents an unnecessary shift-up.
- On braking operation at curve entrance, it gives an early shift-down according to the deceleration.
- In a sporty driving condition, it selects lower gear early even on a light braking operation, giving greater

importance on driving force.

• 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 kick down 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 shift gate enables to cancel DS mode.

JSDIA1362GB

2013 EX

TM-22

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT PATTERN CONTROL

ASC (ADAPTIVE SHIFT CONTROL) : Component Parts Location

INFOID:0000000008285747

1.

IPDM E/R
Refer to 

PCS-4, "Component Parts 

Location"

.

2.

ECM
Refer to 

EC-39, "Component Parts 

Location"

.

3.

BCM
Refer to 

BCS-9, "Component Parts 

Location"

.

4.

Accelerator pedal position sensor
Refer to 

EC-39, "Component Parts 

Location"

.

5.

Stop lamp switch
Refer to 

TM-60, "Component Parts 

Location"

.

6.

ABS actuator and electric unit (con-
trol unit)
Refer to 

BRC-13, "Component Parts 

Location"

.

7.

A/T CHECK indicator lamp
(On the combination meter)

8.

Shift position indicator
(On the combination meter)

9.

Yaw rate/side G sensor
Refer to 

BRC-13, "Component Parts 

Location"

.

10. Unified meter and A/C amp.

Refer to 

MWI-10, "METER SYSTEM 

: Component Parts Location"

.

11.

Joint connector

12. Output speed sensor

*1

13. Control valve & TCM

*2

14. Manual mode position select switch 

(shift-up)

15. Manual mode select switch

16. Manual mode position select switch 

(shift-down)

17. Shift position switch

18. Selector lever position indicator

A.

A/T assembly

B.

A/T shift selector assembly

C.

Center console

*1: Output speed sensor is installed in A/T assembly.

*2: Control valve & TCM is installed in A/T assembly.

JSDIA2909GB

2013 EX

SHIFT PATTERN CONTROL

TM-23

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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NOTE:

The following components are included in control valve & TCM.

• TCM

• Input speed sensor 1, 2

• 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

ASC (ADAPTIVE SHIFT CONTROL) : Component Description

INFOID:0000000008285748

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-80, "Description"

Input speed sensor 1

TM-78, "Description"

Input speed sensor 2

A/T fluid temperature sensor

TM-76, "Description"

Input clutch solenoid valve

TM-104, "Description"

Front brake solenoid valve

TM-107, "Description"

Direct clutch solenoid valve

TM-122, "Description"

High and low reverse clutch solenoid valve

TM-119, "Description"

Low brake solenoid valve

TM-120, "Description"

Anti-interlock solenoid valve

TM-103, "Description"

2346 brake solenoid valve

TM-121, "Description"

Line pressure solenoid valve

TM-102, "Description"

Torque converter clutch solenoid valve

TM-98, "Description"

ECM

EC-39, "System Description"

BCM

BCS-8, "System Description"

ABS actuator and electric unit (control unit)

BRC-22, "System Description"

2013 EX

TM-24

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT PATTERN CONTROL

MANUAL MODE  : System Diagram

INFOID:0000000008285749

MANUAL MODE  : System Description

INFOID:0000000008285750

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted via CAN communication line.

SYSTEM DESCRIPTION

• 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-151, "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 sig-
nal*

Unified meter and A/C amp.

Manual mode signal*

Non-manual mode signal*

Manual mode shift up signal*

Manual mode shift down signal*

2013 EX

SHIFT PATTERN CONTROL

TM-25

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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- When the selector lever shifts to DOWN side while driving in 1GR.
- When the selector lever shifts to UP side while driving in 7GR.

MANUAL MODE  : Component Parts Location

INFOID:0000000008285751

1.

IPDM E/R
Refer to 

PCS-4, "Component Parts 

Location"

.

2.

ECM
Refer to 

EC-39, "Component Parts 

Location"

.

3.

BCM
Refer to 

BCS-9, "Component Parts 

Location"

.

4.

Accelerator pedal position sensor
Refer to 

EC-39, "Component Parts 

Location"

.

5.

Stop lamp switch
Refer to 

TM-60, "Component Parts 

Location"

.

6.

ABS actuator and electric unit (con-
trol unit)
Refer to 

BRC-13, "Component Parts 

Location"

.

7.

A/T CHECK indicator lamp
(On the combination meter)

8.

Shift position indicator
(On the combination meter)

9.

Yaw rate/side G sensor
Refer to 

BRC-13, "Component Parts 

Location"

.

10. Unified meter and A/C amp.

Refer to 

MWI-10, "METER SYSTEM 

: Component Parts Location"

.

11.

Joint connector

12. Output speed sensor

*1

13. Control valve & TCM

*2

14. Manual mode position select switch 

(shift-up)

15. Manual mode select switch

16. Manual mode position select switch 

(shift-down)

17. Shift position switch

18. Selector lever position indicator

A.

A/T assembly

B.

A/T shift selector assembly

C.

Center console

JSDIA2909GB

2013 EX

TM-26

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT PATTERN CONTROL

NOTE:

The following components are included in control valve & TCM.

• TCM

• Input speed sensor 1, 2

• 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

MANUAL MODE  : Component Description

INFOID:0000000008285752

*1: Output speed sensor is installed in A/T assembly.

*2: Control valve & TCM is installed in A/T assembly.

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-80, "Description"

A/T fluid temperature sensor

TM-76, "Description"

Input clutch solenoid valve

TM-104, "Description"

Front brake solenoid valve

TM-107, "Description"

Direct clutch solenoid valve

TM-122, "Description"

High and low reverse clutch solenoid valve

TM-119, "Description"

Low brake solenoid valve

TM-120, "Description"

Anti-interlock solenoid valve

TM-103, "Description"

2346 brake solenoid valve

TM-121, "Description"

Line pressure solenoid valve

TM-102, "Description"

Torque converter clutch solenoid valve

TM-98, "Description"

ECM

EC-39, "System Description"

Unified meter and A/C amp.

MWI-6, "METER SYSTEM : System Description"

2013 EX

LOCK-UP CONTROL

TM-27

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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LOCK-UP CONTROL

System Diagram

INFOID:0000000008285753

System Description

INFOID:0000000008285754

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted by CAN communication line.

SYSTEM DESCRIPTION

The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to
increase power transmission efficiency.
The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid valve,
which is controlled by a signal from TCM, and the torque converter clutch control valve engages or releases
the torque converter clutch piston.

Lock-up operation condition table

Torque Converter Clutch Control Valve Control

Lock-up control system diagram

JSDIA1350GB

Sensor

Input signal to TCM

TCM function

Actuator

Input speed sensor 1, 2

Input speed

Lock-up control

Torque converter clutch solenoid valve

↓

Torque converter clutch control 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)*

Selector lever

“D” position

“M” position

Gear  position

7

6

5

4

3

2

7

6

5

4

3

2

Lock-up

×

–

–

–

–

–

×

×

×

×

×

×

Slip lock-up

×

×

×

×

×

×

×

×

×

×

×

×

2013 EX

TM-28

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

LOCK-UP CONTROL

Lock-up released

• In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the

torque converter clutch solenoid and the lock-up apply pressure is drained.
in this way, the torque converter clutch piston is not coupled.

Lock-up Applied

• In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the

torque converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.

Smooth Lock-up Control

When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the
torque converter clutch is temporarily set to the half-clutched state to reduce the shock.

Half-clutched State

• The current output from the TCM to the torque converter clutch solenoid is varied to steadily increase the

torque converter clutch solenoid pressure.
In this way, the lock-up apply pressure gradually rises and while the torque converter clutch piston is put into
half-clutched states, the torque converter clutch piston operating pressure is increased and the coupling is
completed smoothly.

Slip Lock-up Control

• In the slip region, the torque converter clutch solenoid current is controlled with the TCM to put it into the

half-clutched state. This absorbs the engine torque fluctuation and lock-up operates from low speed.
This raises the fuel efficiency for 2nd, 3rd, 4th 5th, 6th and 7th gears.

JSDIA0847GB

2013 EX

LOCK-UP CONTROL

TM-29

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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Component Parts Location

INFOID:0000000008285755

1.

IPDM E/R
Refer to 

PCS-4, "Component Parts 

Location"

.

2.

ECM
Refer to 

EC-39, "Component Parts 

Location"

.

3.

BCM
Refer to 

BCS-9, "Component Parts 

Location"

.

4.

Accelerator pedal position sensor
Refer to 

EC-39, "Component Parts 

Location"

.

5.

Stop lamp switch
Refer to 

TM-60, "Component Parts 

Location"

.

6.

ABS actuator and electric unit (con-
trol unit)
Refer to 

BRC-13, "Component Parts 

Location"

.

7.

A/T CHECK indicator lamp
(On the combination meter)

8.

Shift position indicator
(On the combination meter)

9.

Yaw rate/side G sensor
Refer to 

BRC-13, "Component Parts 

Location"

.

10. Unified meter and A/C amp.

Refer to 

MWI-10, "METER SYSTEM 

: Component Parts Location"

.

11.

Joint connector

12. Output speed sensor

*1

13. Control valve & TCM

*2

14. Manual mode position select switch 

(shift-up)

15. Manual mode select switch

16. Manual mode position select switch 

(shift-down)

17. Shift position switch

18. Selector lever position indicator

A.

A/T assembly

B.

A/T shift selector assembly

C.

Center console

*1: Output speed sensor is installed in A/T assembly.

*2: Control valve & TCM is installed in A/T assembly.

JSDIA2909GB

2013 EX

TM-30

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

LOCK-UP CONTROL

NOTE:

The following components are included in control valve & TCM.

• TCM

• Input speed sensor 1, 2

• 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

Component Description

INFOID:0000000008285756

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-80, "Description"

Input speed sensor 1

TM-78, "Description"

Input speed sensor 2

A/T fluid temperature sensor

TM-76, "Description"

Torque converter clutch solenoid valve

TM-98, "Description"

Torque converter clutch control valve

Switches the lock-up to operating or released. Also, by performing the lock-up operation 
transiently, lock-up smoothly.

ECM

EC-39, "System Description"

2013 EX

SHIFT MECHANISM

TM-31

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

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SHIFT MECHANISM

Cross-Sectional View

INFOID:0000000008285757

2WD MODELS

AWD MODELS

1.

Low brake

2.

Drum support

3.

Reverse brake

4.

Direct clutch

5.

High and low reverse clutch

6.

2nd one-way clutch

7.

*1

Rear carrier

8.

Mid carrier

9.

Input clutch

10.

*2

Front sun gear

11.

*3

Front carrier

12.

Under drive carrier

13.

1st one-way clutch

14.

Front brake

15.

2346 brake

16.

*4

Input shaft

17.

Torque converter

18.

Oil pump

19.

*2

Under drive sun gear

20.

*3

Under drive internal gear

21.

*4

Front internal gear

22.

Mid sun gear

23.

*1

Mid internal gear

24.

Rear sun gear

25.

Rear internal gear

26.

High and low reverse clutch hub

27.

Control valve & TCM

28.

Parking gear

29.

Rear extension

30.

Output shaft

*1: 7 and 23 are one unit.

*2: 10 and 19 are one unit.

*3: 11 and 20 are one unit.

*4: 16 and 21 are one unit.

JSDIA1852ZZ

2013 EX

TM-32

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

SHIFT MECHANISM

1.

Low brake

2.

Drum support

3.

Reverse brake

4.

Direct clutch

5.

High and low reverse clutch

6.

2nd one-way clutch

7.

*1

Rear carrier

8.

Mid carrier

9.

Input clutch

10.

*2

Front sun gear

11.

*3

Front carrier

12.

Under drive carrier

13.

1st one-way clutch

14.

Front brake

15.

2346 brake

16.

*4

Input shaft

17.

Torque converter

18.

Oil pump

19.

*2

Under drive sun gear

20.

*3

Under drive internal gear

21.

*4

Front internal gear

22.

Mid sun gear

23.

*1

Mid internal gear

24.

Rear sun gear

25.

Rear internal gear

26.

High and low reverse clutch hub

27.

Control valve & TCM

28.

Parking gear

29.

Adapter case

30.

Output shaft

*1: 7 and 23 are one unit.

*2: 10 and 19 are one unit.

*3: 11 and 20 are one unit.

*4: 16 and 21 are one unit.

JSDIA1774ZZ

2013 EX