Nissan Juke Service and Repair Manual : P0778 pressure control solenoid B

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

NOTE

:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

1.CHECK DTC DETECTION

1. Turn ignition switch ON.With CONSULT-III


1. Turn ignition switch ON.

2. Start engine.

3. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

4. Select “Self Diagnostic Results” in “TRANSMISSION”.

Follow the procedure “With CONSULT-III”.With GST


Follow the procedure “With CONSULT-III”.

Is “P0778” detected? YES >> Go to TM-225, "Diagnosis Procedure".

NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

Diagnosis Procedure

1.CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect TCM connector.

3. Check resistance between TCM connector terminal and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 4.

NO >> GO TO 2.

2.CHECK SECONDARY PRESSURE SOLENOID VALVE

Check secondary pressure solenoid valve. Refer to TM-226, "Component Inspection".

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace damaged parts.

3.CHECK HARNESS BETWEEN TCM AND SECONDARY PRESSURE SOLENOID VALVE

1. Turn ignition switch OFF.

2. Disconnect TCM connector and CVT unit harness connector.

3. Check continuity between TCM connector terminal and CVT unit harness connector terminal.

4. If OK, check harness for short to ground and short to power.


4. If OK, check harness for short to ground and short to power.

5. Reinstall any part removed.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace damaged parts.

4.CHECK TCM

Check TCM input/output signals. Refer to TM-164, "Reference Value".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

NO >> Replace the TCM. Refer to TM-280, "Removal and Installation".

Component Inspection

SECONDARY PRESSURE SOLENOID VALVE

1.SECONDARY PRESSURE SOLENOID VALVE

1. Turn ignition switch OFF.

2. Disconnect CVT unit harness connector.

3. Check resistance between CVT unit harness connector terminal and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace the transaxle assembly. Refer to TM-301, "Removal and Installation".

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