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Infiniti G37 Coupe. Manual - part 1322

P0744 A/T TCC S/V FUNCTION (LOCK -UP)

TM-141

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0744 A/T TCC S/V FUNCTION (LOCK -UP)

Description

INFOID:0000000001672159

This malfunction is detected when the A/T does not shift into 5th gear position or the torque converter clutch
does not lock-up as instructed by the TCM. This is not only caused by electrical malfunction (circuits open or
shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation,
etc.

DTC Logic

INFOID:0000000001672160

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “DATA MONITOR”.

Drive vehicle and maintain the following conditions for at least 30 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0744 A/T TCC S/V FUNTN” detected?

YES

>> Go to

TM-141, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-38, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000001672161

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-163, "Diagnosis Procedure"

Is the inspection result normal?

>> Replace the control valve with TCM. Refer to

TM-232, "Exploded View"

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen

terms)

A/T CHECK indicator
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P0744

A/T TCC S/V FUNTN

3rd

• A/T cannot perform

lock-up even if electri-
cal circuit is good.

• TCM detects as irregu-

lar by comparing dif-
ference value with slip
rotation.

• Harness or connectors

(Sensor circuit is open
or shorted.)

• Torque converter

clutch solenoid valve

• Hydraulic control cir-

cuit

ACCELE POSI

: More than 1.0/8

SLCT LVR POSI

: “D” position

TCC SOLENOID

: 0.4 – 0.6 A

VEHICLE SPEED

: 80 km/h (50 MPH) or more

Driving location

: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions
required for this test.

TM-142

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0745 LINE PRESSURE SOLENOID VALVE

P0745 LINE PRESSURE SOLENOID VALVE

Description

INFOID:0000000001672162

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal transmitted from the TCM.

DTC Logic

INFOID:0000000001672163

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Start the engine and wait for at least 5 seconds.

Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0745 L/PRESS SOL/CIRC” detected?

YES

>> Go to

TM-142, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-38, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000001672164

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-163, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to

TM-232, "Exploded View"

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen

terms)

A/T CHECK indicator
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P0745

L/PRESS COL/CIRC

4th

• Normal voltage not ap-

plied to solenoid due
to cut line, short, or the
like.

• TCM detects as irregu-

lar by comparing tar-
get value with monitor
value.

• Harness or connectors

(Sensor circuit is open
or shorted.)

• Line pressure solenoid

valve

P1705 THROTTLE POSITION SENSOR

TM-143

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1705 THROTTLE POSITION SENSOR

Description

INFOID:0000000001672165

Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor, etc. The actuator transmits a signal to the ECM, and ECM transmits signals to TCM with CAN
communication.

DTC Logic

INFOID:0000000001672166

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Start the engine and let it idle for 1 second.

Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Is “P1705 TP SEN/CIRC A/T” detected?

YES

>> Go to

TM-143, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-38, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000001672167

CHECK DTC OF ECM

With CONSULT-III

Turn ignition switch ON.

Perform “SELF-DIAG RESULTS” mode for “ENGINE”.

Is any DTC detected?

YES

>> GO TO 2.

>> Check DTC detected item. Refer to

EC-120, "CONSULT-III Function"

CHECK DTC OF TCM

With CONSULT-III

Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

Is any DTC detected?

YES

>> GO TO 3.

>> Check DTC detected item. Refer to

TM-112, "CONSULT-III Function (TRANSMISSION)"

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-163, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to

TM-232, "Exploded View"

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen

terms)

A/T CHECK indicator
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1705

TP SEN/CIRC A/T

15th

TCM does not receive
the proper accelerator
pedal position signals
(input by CAN communi-
cation) from ECM.

Harness or connectors
(Sensor circuit is open or
shorted.)

TM-144

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1710 A/T FLUID TEMPERATURE SENSOR

P1710 A/T FLUID TEMPERATURE SENSOR

Description

INFOID:0000000001672168

The A/T fluid temperature sensor detects the A/T fluid temperature and transmits a signal to the TCM.

DTC Logic

INFOID:0000000001672169

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “DATA MONITOR”.

Drive vehicle and maintain the following conditions for at least 10 minutes (total). (It is not necessary to
maintain continuously.)

With GST

Follow the procedure “With CONSULT-III”.

Is “P1710 ATF TEMP SEN/CIRC” detected?

YES

>> Go to

TM-144, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-38, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000001672170

CHECK A/T FLUID TEMPERATURE SENSOR 1 SIGNAL

With CONSULT-III

Start the engine.

Select “DATA MONITOR”.

Check “ATF TEMP SE 1” and “ATF TEMP SE 2” values.

Which item is abnormal?

ATF TEMP SE 1>>GO TO 2.
ATF TEMP SE 2>>GO TO 5.

CHECK A/T FLUID TEMPERATURE SENSOR 1

DTC

Item

(CONSULT-III screen

terms)

A/T CHECK indicator
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1710

ATF TEMP SEN/CIRC

10th

While running, the A/T
fluid temperature sensor
signal voltage is exces-
sively high or low.

• Harness or connectors

(Sensor circuit is open
or shorted.)

• A/T fluid temperature

sensors 1 and/or 2

VHCL/S SE-A/T

: 10 km/h (6 MPH) or more

ACCELE POSI

: More than 1.0/8

SLCT LVR POSI

: “D” position

Item name

Condition

C (

Value (Approx.)

ATF TEMP SE 1

0 (32) – 20 (68) – 80 (176)

3.3 – 2.7 – 0.9 V

ATF TEMP SE 2

0 (32) – 20 (68) – 80 (176)

3.3 – 2.5 – 0.7 V

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