Infiniti EX37. Transaxle and Transmission (2013 year). Instruction - page 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
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TM-18
< SYSTEM DESCRIPTION >
[7AT: RE7R01A]
SHIFT CHANGE CONTROL
Component Parts Location
INFOID:0000000008285743
1.
.
2.
ECM
Refer to
3.
.
4.
Accelerator pedal position sensor
Refer to
.
5.
Stop lamp switch
Refer to
6.
ABS actuator and electric unit (con-
trol unit)
Refer to
.
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
.
10. Unified meter and A/C amp.
Refer to
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
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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
Input speed sensor 1
Input speed sensor 2
A/T fluid temperature sensor
Input clutch solenoid valve
Front brake solenoid valve
Direct clutch solenoid valve
High and low reverse clutch solenoid valve
Low brake solenoid valve
Anti-interlock solenoid valve
2346 brake solenoid valve
Line pressure solenoid valve
Torque converter clutch solenoid valve
ECM
BCM
2013 EX
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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
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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
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TM-22
< SYSTEM DESCRIPTION >
[7AT: RE7R01A]
SHIFT PATTERN CONTROL
ASC (ADAPTIVE SHIFT CONTROL) : Component Parts Location
INFOID:0000000008285747
1.
.
2.
ECM
Refer to
3.
.
4.
Accelerator pedal position sensor
Refer to
.
5.
Stop lamp switch
Refer to
6.
ABS actuator and electric unit (con-
trol unit)
Refer to
.
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
.
10. Unified meter and A/C amp.
Refer to
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
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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
Input speed sensor 1
Input speed sensor 2
A/T fluid temperature sensor
Input clutch solenoid valve
Front brake solenoid valve
Direct clutch solenoid valve
High and low reverse clutch solenoid valve
Low brake solenoid valve
Anti-interlock solenoid valve
2346 brake solenoid valve
Line pressure solenoid valve
Torque converter clutch solenoid valve
ECM
BCM
ABS actuator and electric unit (control unit)
2013 EX
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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
• 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
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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.
.
2.
ECM
Refer to
3.
BCM
Refer to
4.
Accelerator pedal position sensor
Refer to
.
5.
Stop lamp switch
Refer to
6.
ABS actuator and electric unit (con-
trol unit)
Refer to
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
10. Unified meter and A/C amp.
Refer to
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
A/T fluid temperature sensor
Input clutch solenoid valve
Front brake solenoid valve
Direct clutch solenoid valve
High and low reverse clutch solenoid valve
Low brake solenoid valve
Anti-interlock solenoid valve
2346 brake solenoid valve
Line pressure solenoid valve
Torque converter clutch solenoid valve
ECM
Unified meter and A/C amp.
MWI-6, "METER SYSTEM : System Description"
2013 EX
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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
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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
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LOCK-UP CONTROL
TM-29
< SYSTEM DESCRIPTION >
[7AT: RE7R01A]
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Component Parts Location
INFOID:0000000008285755
1.
.
2.
ECM
Refer to
3.
BCM
Refer to
4.
Accelerator pedal position sensor
Refer to
.
5.
Stop lamp switch
Refer to
6.
ABS actuator and electric unit (con-
trol unit)
Refer to
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
10. Unified meter and A/C amp.
Refer to
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
Input speed sensor 1
Input speed sensor 2
A/T fluid temperature sensor
Torque converter clutch solenoid valve
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
2013 EX
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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
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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
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