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Nissan Qashqai (2007-2010). Manual - part 582

P0868 SECONDARY PRESSURE DOWN

TM-263

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0868 SECONDARY PRESSURE DOWN

Description

INFOID:0000000000988707

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:0000000000988708

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 and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Select “DATA MONITOR”.

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

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

Is “P0868 SEC/PRESS DOWN” detected?

YES

>> Go to

TM-263, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-39, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000000988709

CHECK LINE PRESSURE

Perform line pressure test. Refer to

TM-318, "Inspection and Judgment"

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair or replace damaged parts. Refer to

TM-318, "Inspection and Judgment"

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0868

SEC/PRESS DOWN

Secondary fluid pressure is too
low compared with the com-
manded value while driving.

• Harness or connectors

(Solenoid circuit is open or
shorted.)

• Pressure control solenoid

valve B (Secondary pressure
solenoid valve) system

• Transmission fluid pressure

sensor A (Secondary pres-
sure 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
slowly)

: 0

→

50 km/h (31 MPH)

ACC PEDAL OPEN

: 0.5/8 – 1.0/8

RANGE

: “D” position

TM-264

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0868 SECONDARY PRESSURE DOWN

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

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

TM-251, "Component

Inspection"

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace damaged parts.

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

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

TM-245, "Component Inspec-

tion"

Is the inspection result normal?

YES

>> GO TO 4.

>> Repair or replace damaged parts.

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

TEM

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

TM-255, "DTC

Logic"

Is the inspection result normal?

YES

>> GO TO 5.

>> Repair or replace damaged parts.

CHECK TCM

Check input/output signal. Refer to

TM-285, "Reference Value"

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-39, "Intermittent Incident"

>> Replace TCM. Refer to

TM-325, "Exploded View"

P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

TM-265

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

Description

INFOID:0000000000988710

When the power supply to the TCM is cut OFF, for example because the battery is removed, and the self-diag-
nosis memory function stops, malfunction is detected.
NOTE:
Since “P1701 TCM-POWER SUPPLY” will be indicated when replacing TCM, perform diagnosis after
erasing “SELF-DIAG RESULTS”

DTC Logic

INFOID:0000000000988711

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch
OFF and wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Wait for at least 2 consecutive seconds.

Perform “SELF-DIAG RESULTS”. Refer to

TM-216, "CONSULT-III Function (TRANSMISSION)"

Is “P1701 TCM-POWER SUPPLY” detected?

YES

>> Go to

TM-265, "Diagnosis Procedure"

>> Check intermittent incident. Refer to

GI-39, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000000988712

CHECK TCM POWER SOURCE

Check voltage between TCM connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 4.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1701

TCM-POWER SUPPLY

• When the power supply to the

TCM is cut OFF, for example
because the battery is re-
moved, and the self-diagno-
sis memory function stops.

• This is not a malfunction

message (Whenever shutting
OFF a power supply to the
TCM, this message appears
on the screen).

• Harness or connectors

(Battery or ignition switch and
TCM circuit is open or short-
ed.)

Name

TCM connector

Ground

Condition

Voltage (Approx.)

Connector

Terminal

Power supply

F25

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

Power supply (mem-
ory back-up)

Always

Battery voltage

TM-266

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

>> GO TO 2.

DETECT MALFUNCTIONING ITEM

Check the following.
• Harness for short or open between battery and TCM connector terminal 45, 47
• Harness for short or open between ignition switch and TCM connector terminal 46, 48
• 10 A fuse (No. 55, located in the IPDM E/R)
• 15 A fuse (No. 13, located in the J/B)
• Ignition switch. Refer to

TM-332, "Exploded View"

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK TCM GROUND CIRCUIT

Turn ignition switch OFF.

Disconnect TCM connector.

Check continuity between TCM connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 4.