P0778

P0778 PRESSURE CONTROL SOLENOID B





Description
- Secondary pressure solenoid valve is installed to control valve.
- Secondary pressure solenoid valve adjusts oil pump discharge pressure to optimum level according to the driving conditions.
- The adoption of an N/H type (normal high) secondary pressure solenoid valve enables generation of a control oil pressure when a voltage is not applied to the coil.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE

CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start the engine.
2. Drive the vehicle for 10 seconds or more.
3. Stop the vehicle.
4. Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0778" detected?
YES - Go to P0778.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT
1. Turn ignition switch OFF.
2. Check resistance between TCM connector terminal and ground.





Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - GO TO 2.
2.CHECK SECONDARY PRESSURE SOLENOID VALVE
1. Disconnect CVT unit harness connector.
2. Check secondary pressure solenoid valve. P0778.
Is the inspection result normal?
YES - GO TO 3.
NO - Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT SECONDARY PRESSURE SOLENOID VALVE) (PART 1)
1. Disconnect TCM connector.
2. Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side harness connector terminal.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace damaged parts.
4.CHECK HARNESS BETWEEN TCM AND CVT UNIT (SECONDARY PRESSURE SOLENOID VALVE) (PART 2)
Check continuity between TCM vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES - Check 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 harness connector terminal and ground.





Is the inspection result normal?
YES - INSPECTION END
NO - Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.