Nissan Altima L32. Manual - part 1455

TM-164

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0841 PRESSURE SENSOR FUNCTION

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)

1. Turn ignition switch OFF.

2. Disconnect CVT unit harness connector.

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

TM-164, "Component

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

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to 

TM-164, "Component

Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK STEP MOTOR SYSTEM

Check step motor system. Refer to 

TM-184, "Description"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

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:0000000004201730

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"

.

Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure So-
lenoid Valve)]

INFOID:0000000004201731

1.

CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

CVT unit terminal

Ground

Resistance (Approx.)

2

3.0 – 9.0 

Ω

AWDIA0122ZZ

P0841 PRESSURE SENSOR FUNCTION

TM-165

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Check resistance between CVT unit terminal 3 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.)

3

3.0 – 9.0 

Ω

AWDIA0123ZZ

TM-166

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE
SENSOR)

Description

INFOID:0000000004201732

The transmission fluid pressure sensor B (primary pressure sensor) detects primary pressure of CVT and

sends TCM the signal.

DTC Logic

INFOID:0000000004201733

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. Select “DATA MONITOR”.

3. Make sure that output voltage of line temperature sensor is within the range below.

4. Start engine and wait for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0845 TR PRS SENS/B CIRC” detected?

YES

>> Go to 

TM-166, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201734

1.

CHECK INPUT SIGNAL

1. Start engine.

2. Check voltage between TCM harness connector F16 terminal

14 and ground.

3. Turn ignition switch OFF.
Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER AND SENSOR GROUND

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0845

TR PRS SENS/B CIRC

Signal voltage of the transmission fluid pres-
sure sensor B (primary pressure sensor) is 
too high or too low while driving.

• Harness or connectors

(Sensor circuit is open or shorted.)

• Transmission fluid pressure sensor B (pri-

mary pressure sensor)

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)

TCM harness connec-

tor

Ground

Condition

Voltage (Ap-

prox.)

Connector

Terminal

F16

14

“N” position idle

0.7 – 3.5 V

JPDIA0986ZZ

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

TM-167

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

1. Turn ignition switch ON.

2. Check voltage between TCM harness connector F16 terminal

25 and 26.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT [TRANSMISSION FLUID PRESSURE SENSOR B

(PRIMARY PRESSURE SENSOR)] (PART 1)

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector and CVT unit harness con-

nector.

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

minal 14 and CVT unit harness connector F46 (B) terminal 25.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK HARNESS BETWEEN TCM AND CVT UNIT [TRANSMISSION FLUID PRESSURE SENSOR B

(PRIMARY PRESSURE SENSOR)] (PART 2)

Check continuity between TCM harness connector F16 terminal 14

and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

5.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART

1)

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector and CVT unit harness con-

nector.

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

minal 25, 26 and CVT unit harness connector F46 (B) terminal

19, 20.

Is the inspection result normal?

YES

>> GO TO 6.

TCM harness connector

Voltage (Ap-

prox.)

Connector

Terminal

F16

25

26

5.0 V

AWDIA0132ZZ

TCM harness connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F16 (A)

14

F46 (B)

25

Existed

AWDIA0138ZZ

TCM harness connector

Ground

Continuity

Connector

Terminal

F16

14

Not existed

AWDIA0139ZZ

TCM harness connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F16 (A)

25

F46 (B)

19

Existed

26

20

AWDIA0135ZZ