Infiniti EX37. Transaxle and Transmission (2013 year). Manual - part 1

Stall Speed ............................................................

Torque Converter ..................................................

Total End Play .......................................................

Reverse Brake Clearance .....................................

Front Brake Clearance ..........................................

2346 Brake Clearance ..........................................

304

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

DIAGNOSIS AND REPAIR WORK FLOW

TM-5

< BASIC INSPECTION >

[7AT: RE7R01A]

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000008285731

OBTAIN INFORMATION ABOUT SYMPTOM

Refer to

TM-6, "Diagnostic Work Sheet"

and interview the customer to obtain the malfunction information (con-

ditions and environment when the malfunction occurred) as much as possible when the customer brings in the
vehicle.

>> GO TO 2.

CHECK DTC

Before checking the malfunction, check whether any DTC exists.

If DTC exists, perform the following operations.

Record the DTC and freeze frame data. (Print out the data using CONSULT and affix it to the Work Order
Sheet.)

Erase DTCs.

Check the relationship between the cause that is clarified with DTC and the malfunction information
described by the customer.

TM-158, "Symptom Table"

is effective.

Check the information of related service bulletins and others also.

Do malfunction information and DTC exists?

Malfunction information and DTC exists. >>GO TO 3.
Malfunction information exists, but no DTC. >>GO TO 4.
No malfunction information, but DTC exists. >>GO TO 5.

REPRODUCE MALFUNCTION SYMPTOM

Check any malfunction described by a customer, except those with DTC on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to

TM-151, "Fail-Safe"

When a malfunction symptom is reproduced, the question sheet is effective. Refer to

TM-6, "Diagnostic Work

Sheet"

Verify the relationship between the symptom and the conditions in which the malfunction described by the cus-
tomer occurs.

>> GO TO 5.

REPRODUCE MALFUNCTION SYMPTOM

Check the malfunction described by the customer on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to

TM-151, "Fail-Safe"

When a malfunction symptom is reproduced, the question sheet is effective. Refer to

TM-6, "Diagnostic Work

Sheet"

Verify the relationship between the symptom and the conditions in which the malfunction described by the cus-
tomer occurs.

>> GO TO 6.

PERFORM “DTC CONFIRMATION PROCEDURE”

Perform “DTC CONFIRMATION PROCEDURE” of the appropriate DTC to check if DTC is detected again.
Refer to

TM-155, "DTC Inspection Priority Chart"

when multiple DTCs are detected, and then determine the

order for performing the diagnosis.
NOTE:
If no DTC is detected, refer to the freeze frame data.

Is any DTC detected?

YES

>> GO TO 7.

>> Check according to

GI-42, "Intermittent Incident"

IDENTIFY MALFUNCTIONING SYSTEM WITH “DIAGNOSIS CHART BY SYMPTOM”

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

TM-6

< BASIC INSPECTION >

[7AT: RE7R01A]

DIAGNOSIS AND REPAIR WORK FLOW

Use

TM-158, "Symptom Table"

from the symptom inspection result in step 4. Then identify where to start per-

forming the diagnosis based on possible causes and symptoms.

>> GO TO 8.

REPAIR OR REPLACE THE MALFUNCTIONING PARTS

Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.

>> GO TO 8.

FINAL CHECK

Perform “DTC CONFIRMATION PROCEDURE” again to make sure that the repair is correctly performed.
Check that malfunctions are not reproduced when obtaining the malfunction information from the customer,
referring to the symptom inspection result in step 3 or 4.

Is DTC or malfunction symptom reproduced?

YES-1 >> DTC is reproduced: GO TO 5.
YES-2 >> Malfunction symptom is reproduced: GO TO 6.
NO

>> Before delivering the vehicle to the customer, make sure that DTC is erased.

Diagnostic Work Sheet

INFOID:0000000008285732

DESCRIPTION

There are many operating conditions that may cause a malfunction
of the transmission parts. By understanding those conditions prop-
erly, a quick and exact diagnosis can be achieved.
In general, customers have their own criteria for a problem. There-
fore, it is important to understand the symptom and status well
enough by asking the customer about the concerns carefully. In
order to systemize all the information for the diagnosis, prepare the
question sheet referring to the question points.

WORKSHEET SAMPLE

SEF907L

Question Sheet

Customer name MR/MS

Engine #

Manuf. Date

Incident Date

VIN

Model & Year

In Service Date

Trans.

Mileage

km/Mile

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

DIAGNOSIS AND REPAIR WORK FLOW

TM-7

< BASIC INSPECTION >

[7AT: RE7R01A]

Symptoms

Vehicle does not move (

Any position

Particular position )

No up-shift (

1GR

→

2GR

→

3GR

→

4GR

→

5GR

→

6GR

→

7GR)

No down-shift (

7GR

→

6GR

→

5GR

→

4GR

→

3GR

→

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

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

TM-8

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

A/T CONTROL SYSTEM

SYSTEM DESCRIPTION

A/T CONTROL SYSTEM

System Diagram

INFOID:0000000008285733

System Description

INFOID:0000000008285734

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.

JPDIA1196GB

Sensor (or signal)

⇒

TCM function

⇒

Actuator

Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
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-11

)

Shift change control (

TM-15

)

Shift pattern control
• ASC (Adaptive shift control) (

TM-20

)

• Manual mode (

TM-24

)

Lock-up control (

TM-27

)

Fail-safe control (

TM-151

)

Self-diagnosis (

TM-63

)

CONSULT communication line (

TM-63

)

CAN communication line (

TM-71

)

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

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

A/T CONTROL SYSTEM

TM-9

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

Component Parts Location

INFOID:0000000008285735

IPDM E/R
Refer to

PCS-4, "Component Parts

ECM
Refer to

BCM
Refer to

BCS-9, "Component Parts

Accelerator pedal position sensor
Refer to

Stop lamp switch
Refer to

TM-60, "Component Parts

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

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

Shift position indicator
(On the combination meter)

Yaw rate/side G sensor
Refer to

: Component Parts Location"

10. Unified meter and A/C amp.

Refer to

MWI-10, "METER SYSTEM

11.

Joint connector

12. Output speed sensor

13. Control valve & TCM

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/T assembly

A/T shift selector assembly

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-10

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

A/T CONTROL SYSTEM

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:0000000008285736

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-74, "Description"

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"

Torque converter clutch solenoid valve

TM-98, "Description"

Line pressure solenoid valve

TM-102, "Description"

Accelerator pedal position sensor

TM-108, "Description"

Throttle position sensor

Manual mode switch

TM-116, "Description"

Starter relay

TM-72, "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

BRC-55, "Description"

ECM

EC-39, "System Description"

BCM

BCS-8, "System Description"

Unified meter and A/C amp.

MWI-6, "METER SYSTEM : System Description"

ABS actuator and electric unit (control unit)

BRC-22, "System Description"

Wheel sensor

BRC-37, "Description"

Yaw rate/side G sensor

BRC-73, "Description"

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LINE PRESSURE CONTROL

TM-11

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

LINE PRESSURE CONTROL

System Diagram

INFOID:0000000008285737

System Description

INFOID:0000000008285738

INPUT/OUTPUT SIGNAL CHART

*: This signal is transmitted by CAN communication line.

SYSTEM DESCRIPTION

• When an engine and A/T integrated control signal (engine torque) equivalent to the engine drive force is

transmitted from the ECM to the TCM, the TCM controls the line pressure solenoid valve.
This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the pres-
sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving
state.

• The TCM has stored in memory a number of patterns for the optimum line pressure characteristic for the

driving state.

• In order to obtain the most appropriate line pressure characteristic to meet the current driving state, the TCM

controls the line pressure solenoid current value and thus controls the line pressure.

Normal Control

JSDIA1345GB

Sensor

Input signal to TCM

TCM function

Actuator

Input speed sensor 1, 2

Input speed

Line pressure control

Line pressure solenoid valve

↓

Pressure regulator valve

Output speed sensor

Vehicle speed

A/T fluid temperature sensor

ATF temperature

ECM

Engine speed signal*

Accelerator pedal position signal*

Engine and A/T integrated control signal
(Engine torque)*

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

TM-12

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

LINE PRESSURE CONTROL

Each clutch is adjusted to the necessary pressure to match the
engine drive force.

Back-up Control (Engine Brake)

When the select operation is performed during driving and the A/T is
shifted down, the line pressure is set according to the vehicle speed.

During Shift Change

The necessary and adequate line pressure for shift change is set.
For this reason, line pressure pattern setting corresponds to engine
torque and gearshift selection. Also, line pressure characteristic cor-
responds to engine speed, during engine brake operation.

At Low Fluid Temperature

PCIA0008E

PCIA0009E

PCIA0010E

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

LINE PRESSURE CONTROL

TM-13

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

When the A/T fluid temperature drops below the prescribed tempera-
ture, in order to speed up the action of each friction element, the line
pressure is set higher than the normal line pressure characteristic.

Component Parts Location

INFOID:0000000008285739

PCIA0011E

IPDM E/R
Refer to

PCS-4, "Component Parts

ECM
Refer to

BCM
Refer to

BCS-9, "Component Parts

Accelerator pedal position sensor
Refer to

Stop lamp switch
Refer to

TM-60, "Component Parts

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

JSDIA2909GB

2013 EX

-------------------------------------------------------------------------------------------------------------------------------------------------------------

TM-14

< SYSTEM DESCRIPTION >

[7AT: RE7R01A]

LINE PRESSURE 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:0000000008285740

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

Shift position indicator
(On the combination meter)

Yaw rate/side G sensor
Refer to