Nissan Teana J32. Manual - part 1184

TM-260

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1745 LINE PRESSURE CONTROL

P1745 LINE PRESSURE CONTROL

Description

INFOID:0000000003806468

The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to the signal sent from the TCM.

DTC Logic

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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.
Perform the following procedure to confirm the malfunction is eliminated after the repair.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON

2.

Select “Data Monitor” mode for “TRANSMISSION”.

3.

Make sure that output voltage of CVT fluid temperature sensor is within the range below.

Is “P1745 L/PRESS CONTROL” detected?

YES

>> Go to 

TM-260, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003806470

1.

CHECK DTC 

With CONSULT-III

1.

Start engine.

2.

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

Is the “P1745 L/PRESS CONTROL” displayed?

YES

>> Replace TCM. Refer to 

TM-315, "Exploded View"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1745

L/PRESS CONTROL

TCM detects the unexpected 
line pressure.

TCM

ATF TEMP SEN

: 1.0 – 2.0 V

If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the 
voltage (cool down the fluid)

P1777 STEP MOTOR

TM-261

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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P1777 STEP MOTOR

Description

INFOID:0000000003806471

The step motor changes the step by turning 4 coils ON/OFF according to the signal from TCM. As a result, the
flow of line pressure to primary pulley is changed and pulley ratio is controlled.

DTC Logic

INFOID:0000000003806472

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.
Perform the following procedure to confirm the malfunction is eliminated after the repair.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Start engine.

2.

Drive vehicle for at least 5 consecutive seconds.

3.

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

With GST

Follow the procedure “With CONSULT-III”.

Is “P1777 STEP MOTR CIRC” detected?

YES

>> Go to 

TM-261, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003806473

1.

CHECK STEP MOTOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check resistance between TCM vehicle side harness connector terminals.

4.

Check resistance between TCM vehicle side harness connector terminals and ground.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1777

STEP MOTR CIRC

Each coil of the step motor is 
not energized properly due to 
an open or a short.

• Step motor
• Harness or connectors

(Step motor circuit is open or 
shorted.)

TCM vehicle side harness connector

Resistance (Approx.)

Connector

Terminal

F23

27

28

30.0 

Ω

29

30

TM-262

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1777 STEP MOTOR

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)

1.

Disconnect CVT unit harness connector.

2.

Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side har-
ness connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)

Check continuity between TCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK STEP MOTOR

Check step motor. Refer to 

TM-263, "Component Inspection (Step Motor)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-315, "Exploded View"

.

NO

>> Repair or replace damaged parts.

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F23

27

15.0 

Ω

28

29

30

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

27

F24

9

Existed

28

8

29

7

30

6

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

27

Not existed

28

29

30

P1777 STEP MOTOR

TM-263

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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Component Inspection (Step Motor)

INFOID:0000000003806474

1.

STEP MOTOR

Check resistance between CVT unit connector terminals and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the transaxle assembly. Refer to 

TM-332, "Exploded View"

.

CVT unit connector

Resistance (Approx.)

Connector

Terminal

F24

6

7

 30.0 

Ω

8

9

CVT unit connector

 Ground

Resistance (Approx.)

Connector

Terminal

F24

6

 15.0 

Ω

7

8

9