P0746

P0746 PRESSURE CONTROL SOLENOID A

Description

- When line pressure solenoid valve is under electrically normal condition, if unusual gear change ratio at
LOW side is detected due to low line pressure, it is judged as malfunction.
- This DTC is not caused by electrical malfunction (circuit is open or shorted), but caused by mechanical malfunction (control valve clogging, solenoid valve sticking, etc.).


DTC Logic


DTC DETECTION LOGIC







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

With CONSULT
1.Start the engine.
2.Warm up the engine. [Set the CVT fluid to 20�C (68�F) or more.]
NOTE:
When the ambient temperature is 20�C (68�F), the CVT fluid usually increases to 50 to 80�C (122 to
176�F) with driving in an urban area for approximately 10 minutes.
3.Drive the vehicle.
4.Maintain the following conditions for 1 second or more.





5.Stop the vehicle.
6.Check DTC.
With GST
Follow the procedure "With CONSULT".
Is "P0746" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END
Revision: March 20122013 Infiniti JX


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 LINE PRESSURE SOLENOID VALVE

1.Turn ignition switch OFF.
2.Disconnect CVT unit connector.
3.Check line pressure solenoid valve. Refer to "Component Inspection (Line Pressure Solenoid Valve)" .
Is the inspection result normal?
YES- GO TO 3.
NO- Replace transaxle assembly. Refer to "Exploded View" Exploded View.

3. CHECK SECONDARY SPEED SENSOR SYSTEM

Check secondary speed sensor system. Refer to "DTC Logic" P0720.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace damaged parts.

4. CHECK PRIMARY SPEED SENSOR SYSTEM

Check primary speed sensor system. Refer to "DTC Logic" P0715.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. PERFORM 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.
Revision: March 20122013 Infiniti JX