P0868

P0868 TRANSMISSION FLUID PRESSURE

Description

Secondary pressure solenoid valve controls input and output of secondary pressure to secondary pulley according to driving condition, following the command by TCM.


DTC Logic


DTC DETECTION LOGIC






*: "X" shows lower limit of oil flow amount from oil pump according to engine speed.

DTC CONFIRMATION PROCEDURE


CAUTION:
Always drive vehicle at a safe speed.

1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION (PART 1)

With CONSULT
1.Start the engine.
2.Select "Data Monitor" in "TRANSMISSION".
3.Select "RANGE", "ATF TEMP SEN", "ACCEL POSI SEN 1", and "ESTM VSP SIG".
4.Drive the vehicle.
5.Maintain the following conditions for 2 minutes or more.
Revision: March 20122013 Infiniti JX





6.Stop the vehicle.
7.Check DTC.
Is "P0868" detected?
YES- Go to "Diagnosis Procedure" .
NO- GO TO 3.

3. CHECK DTC DETECTION (PART 2)

With CONSULT
1.Select "Data Monitor" in "TRANSMISSION".
2.Select "RANGE", "ATF TEMP SEN", "ACCEL POSI SEN 1", "BRAKESW", and "ESTM VSP SIG".
3.Drive the vehicle.
4.Maintain the following conditions for 30 seconds or more.





5.Stop the vehicle.
6.Check DTC.
Is "P0868" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK LINE PRESSURE

Perform line pressure test. Refer to "Work Procedure" Line Pressure Test.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace damaged parts.

2. CHECK SECONDARY PRESSURE SOLENOID VALVE

1.Turn ignition switch OFF.
2.Disconnect CVT unit connector.
3.Check secondary pressure solenoid valve. Refer to "Component Inspection (Secondary Pressure Solenoid Valve)" .
Is the inspection result normal?
YES- GO TO 3.
NO- Replace transaxle assembly due to malfunction in secondary pressure solenoid valve. Refer to
"Removal and Installation" Removal and Installation.

3. CHECK LINE PRESSURE SOLENOID VALVE

Check line pressure solenoid valve. Refer to "Component Inspection (Line Pressure Solenoid Valve)" .
Is the inspection result normal?
YES- GO TO 4.
NO- Replace transaxle assembly due to malfunction in line pressure solenoid valve. Refer to "Removal and Installation" Removal and Installation.

4. CHECK SECONDARY PRESSURE SENSOR SYSTEM

Revision: March 20122013 Infiniti JX
Check secondary pressure sensor system. Refer to "DTC Logic" P0840.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace transaxle assembly. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace damaged parts.


Component Inspection (Line Pressure Solenoid Valve)


1. CHECK LINE PRESSURE SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace transaxle assembly due to malfunction in line pressure solenoid valve. Refer to "Removal and Installation" Removal and Installation.


Component Inspection (Secondary Pressure Solenoid Valve)


1. CHECK SECONDARY PRESSURE SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace transaxle assembly due to malfunction in secondary pressure solenoid valve. Refer to
"Removal and Installation" Removal and Installation.
Revision: March 20122013 Infiniti JX