P0778

P0778 PRESSURE CONTROL SOLENOID B

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.Drive the vehicle at least for 10 seconds.
3.Stop the vehicle.
4.Check DTC.
With GST
Follow the procedure "With CONSULT".
Is "P0778" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Electrical Diagrams.

1. 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 2.
NO- Replace transaxle assembly due to malfunction in secondary pressure solenoid valve. Refer to
"Removal and Installation" Removal and Installation.

2. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

1.Disconnect TCM connector.
2.Check continuity between TCM harness connector terminal and CVT unit harness connector terminal.
Revision: March 20122013 Infiniti JX





3.Check continuity between TCM harness connector terminal and ground.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace damaged parts.


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