Nissan Altima L32. Instruction — part 1456

TM-168

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

NO

>> Repair or replace damaged parts.

6.

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

2)
Check continuity between TCM harness connector F16 terminal 25,

26 and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK TCM

1. Replace same type TCM. Refer to

TM-254, "Exploded View"

.

2. Connect each connector.

3. Perform “DTC CONFIRMATION PROCEDURE”. Refer to

TM-166, "DTC Logic"

.

Is “P0840 TR PRS SENS/A CIRC” detected?

YES

>> Replace transaxle assembly. Refer to

TM-259, "Exploded View"

.

NO

>> Replace TCM. Refer to

TM-254, "Exploded View"

.

8.

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.

TCM harness connector

Ground

Continuity

Connector

Terminal

F16

25

Not existed

26

AWDIA0136ZZ

P0868 SECONDARY PRESSURE DOWN

TM-169

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

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B

TM

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P0868 SECONDARY PRESSURE DOWN

Description

INFOID:0000000004201735

The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary pressure

to suit the driving condition in response to a signal sent from the TCM.

DTC Logic

INFOID:0000000004201736

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

4. Start engine and maintain the following conditions for at least 10 consecutive seconds.

Is “P0868 SEC/PRESS DOWN” detected?

YES

>> Go to

TM-169, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201737

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 B (SECONDARY 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

P0868

SEC/PRESS DOWN

Secondary fluid pressure is too low com-
pared with the commanded value while driv-
ing.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Pressure control solenoid valve B (sec-

ondary pressure solenoid valve) system

• Transmission fluid pressure sensor A

(secondary pressure sensor)

• Line pressure control system

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)

VEHICLE SPEED (accelerate slow-
ly)

: 0

→ 50 km/h (31 MPH)

ACC PEDAL OPEN

: 0.5/8 – 1.0/8

RANGE

: “D” position

TM-170

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0868 SECONDARY PRESSURE DOWN

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

TM-170, "Compo-

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

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

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

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

TM-170, "Component Inspec-

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

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYS-

TEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to

TM-160, "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:0000000004201738

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:0000000004201739

1.

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

CVT unit terminal

Ground

Resistance (Approx.)

2

3.0 – 9.0

Ω

AWDIA0122ZZ

P0868 SECONDARY PRESSURE DOWN

TM-171

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

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B

TM

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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