Nissan Rogue Service Manual: P0778 pressure control solenoid B

Nissan Rogue Service Manual / Transmission & driveline / Transaxle & Transmission / Dtc/circuit diagnosis / P0778 pressure control solenoid B

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0778	PC SOLENOID B (Pressure Control Solenoid “B” Electrical)	When all of the following conditions are satisfied and this state is maintained for 0.48 seconds: TCM power supply voltage: More than 11 V TCM judges that solenoid valve circuit is shorted to ground.

POSSIBLE CAUSE

Harness or connector (Secondary pressure solenoid valve circuit is shorted to ground)
Secondary pressure solenoid valve

FAIL-SAFE

Selector shock is large
Start is slow
Acceleration is slow
Lock-up is not performed

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

1.PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.

>> GO TO 2.

2.CHECK DTC DETECTION

Start the engine and wait for 5 seconds or more.
Check the first trip DTC.

Is “P0778” detected? YES >> Go to TM-141, "Diagnosis Procedure".

NO-1 >> To check malfunction symptom before repair: Refer to GI-41, "Intermittent Incident".

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

1.CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

Turn ignition switch OFF.
Disconnect TCM connector and CVT unit connector.
Check continuity between TCM harness connector terminal and ground.

Heck circuit between TCM and CVT unit

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair or replace damaged parts.

2.CHECK CIRCUIT BETWEEN CVT UNIT AND GROUND

Check continuity between CVT unit harness connector terminal and ground.

Check circuit between CVT unit and ground

Is the inspection result normal? YES >> INSPECTION END

NO >> There is malfunction of secondary pressure solenoid valve. Replace transaxle assembly. Refer to TM-220, "Removal and Installation".

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