Infiniti EX35. Manual - part 1420

Diagnosis Procedure

INFOID:0000000003130510

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to

TM-69, "Diagnosis Procedure"

>> 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

P0740

TCC SOLENOID/CIRC

3rd

Normal voltage not ap-
plied to solenoid due to
cut line, short, or the like.

• Harness or connectors

(Solenoid circuit is
open or shorted.)

• Torque converter

clutch solenoid valve

VHCL/S SE-A/T

: 80 km/h (50 MPH) or more

ACCELE POSI

: 0.5/8 – 1.0/8

SLCT LVR POSI

: “D” position

Drive location

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

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

TM-69

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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

Description

INFOID:0000000003130511

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:0000000003130512

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “Data Monitor” mode for “TRANSMISSION”.

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 FNCTN” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003130513

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

Is the inspection result normal?

>> Replace the control valve with TCM. Refer to

TM-70, "Diagnosis Procedure"

>> 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 FNCTN

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-70

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0745 LINE PRESSURE SOLENOID VALVE

P0745 LINE PRESSURE SOLENOID VALVE

Description

INFOID:0000000003130514

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:0000000003130515

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.

Select “Self Diagnostic Results” mode for “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0745 L/PRESS SOL/CIRC” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003130516

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to

TM-71, "Diagnosis Procedure"

>> 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 SOL/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-71

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1705 THROTTLE POSITION SENSOR

Description

INFOID:0000000003130517

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:0000000003130518

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.

Select “Self Diagnostic Results” mode for “TRANSMISSION”.

Is “P1705 TP SEN/CIRC A/T” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

EC-113, "CONSULT-III Function"

Diagnosis Procedure

INFOID:0000000003130519

CHECK DTC OF ECM

With CONSULT-III

Turn ignition switch ON.

Select “Self Diagnostic Results” mode for “ENGINE”.

Is the inspection result normal?

YES

>> GO TO 2.

>> Check DTC detected item. Refer to

CHECK DTC OF TCM

With CONSULT-III

Select “Self Diagnostic Results” mode for “TRANSMISSION”.

Is any DTC other than “P1705 TP SEN/CIRC A/T” detected?

YES

>> Check DTC detected item. Refer to

TM-40, "CONSULT-III Function (TRANSMISSION)"

>> GO TO 3.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to