Nissan Altima L32. Manual - part 1451

TM-148

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0745 LINE PRESSURE SOLENOID VALVE

P0745 LINE PRESSURE SOLENOID VALVE

Description

INFOID:0000000004201703

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 a signal sent from the TCM.

DTC Logic

INFOID:0000000004201704

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.

1.

CHECK DTC DETECTION

With CONSULT-III

1. Turn ignition switch ON.

2. Start engine and wait at least 5 seconds.

3. 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-148, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201705

1.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE) CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector.

3. Check resistance between TCM harness connector F16 terminal

40 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT [PRESSURE CONTROL SOLENOID VALVE A (LINE

PRESSURE SOLENOID VALVE)] (PART 1)

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0745

L/PRESS SOL/CIRC

• Normal voltage not applied to solenoid 

due to open or short circuit.

• TCM detects as irregular by comparing 

target value with monitor value.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Pressure control solenoid valve A (line 

pressure solenoid valve)

TCM harness connector

Ground

Resistance (Ap-

prox.)

Connector

Terminal

F16

40

3.0 – 9.0 

Ω

AWDIA0120ZZ

P0745 LINE PRESSURE SOLENOID VALVE

TM-149

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

1. Disconnect CVT unit connector.

2. Check continuity between TCM harness connector F16 (A) ter-

minal 40 and CVT unit harness connector F46 (B) terminal 2.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT [PRESSURE CONTROL SOLENOID VALVE A (LINE

PRESSURE SOLENOID VALVE)] (PART 2)

Check continuity between TCM vehicle side harness connector F16

terminal 40 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)

Check pressure control solenoid valve A (line pressure solenoid valve). Refer to 

TM-149, "Component Inspec-

tion [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)]"

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace transaxle assembly. Refer to 

TM-259, "Exploded View"

.

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-254, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid 
Valve)]

INFOID:0000000004201706

1.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)

Check resistance between CVT unit terminal 2 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-259,

"Exploded View"

.

TCM harness connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F16 (A)

40

F46 (B)

2

Existed

AWDIA0121ZZ

TCM harness connector

Ground

Continuity

Connector

Terminal

F16

40

Not existed

AWDIA0120ZZ

CVT unit terminal

Ground

Resistance (Approx.)

2

3.0 – 9.0 

Ω

AWDIA0122ZZ

TM-150

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRESSURE 

SOLENOID VALVE)

P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE
PRESSURE SOLENOID VALVE)

Description

INFOID:0000000004201707

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 a signal sent from the TCM.

DTC Logic

INFOID:0000000004201708

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.

1.

CHECK DTC DETECTION

With CONSULT-III

1. Turn ignition switch ON.

2. Select “DATA MONITOR”.

3. Start engine and maintain the following conditions for at least 10 consecutive seconds. Test start from 0

km/h (0 MPH).

With GST

Follow the procedure “With CONSULT-III”.
Is “P0746 PRS CNT SOL/A FCTN” detected?

YES

>> Go to 

TM-150, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201709

1.

CHECK LINE PRESSURE

Perform line pressure test. Refer to 

TM-247, "Inspection and Judgment"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts. Refer to 

TM-247, "Inspection and Judgment"

.

2.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)

1. Turn ignition switch OFF.

2. Disconnect CVT unit harness connector.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0746

PRS CNT SOL/A FCTN

Unexpected gear ratio was detected in the 
low side due to excessively low line pres-
sure.

• Line pressure control system
• Output speed sensor (secondary speed 

sensor)

• Input speed sensor (primary speed sen-

sor)

ATF TEMP SEN

: 1.0 

− 2.0 V

ACC PEDAL OPEN

: More than 1.0/8

RANGE

: “D” position

VEHICLE SPEED

: 10 km/h (6 MPH) or more

Driving location

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

P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRESSURE 

SOLENOID VALVE)

TM-151

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3. Check pressure control solenoid valve A (line pressure solenoid valve). Refer to 

TM-151, "Component

Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)]"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace transaxle assembly. Refer to 

TM-259, "Exploded View"

.

3.

CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM

Check output speed sensor (secondary speed sensor) system. Refer to 

TM-138, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM

Check input speed sensor (primary speed sensor) system. Refer to 

TM-135, "DTC Logic"

.

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-254, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid 
Valve)]

INFOID:0000000004201710

1.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)

Check resistance between CVT unit terminal 2 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-259,

"Exploded View"

.

CVT unit terminal

Ground

Resistance (Approx.)

2

3.0 – 9.0 

Ω

AWDIA0122ZZ