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".

    P0776 pressure control solenoid B
    Description The secondary pressure solenoid valve regulates the secondary pressure to suit the driving condition in response to a signal sent from the TCM. DTC Logic DTC DETECTION LOGIC DTC C ...

    P0826 up and down shift SW
    DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignit ...

    Other materials:

    On board diagnostic (OBD) system
    Diagnosis Description DESCRIPTION The CVT system has two self-diagnostic systems. The first is the emission-related on board diagnostic system (OBD) performed by the TCM in combination with the ECM. The malfunction is indicated by the MIL (malfunction indicator lamp) and is stored as a DTC ...

    On board diagnostic (OBD) system
    Diagnosis Description The ECM controls the display on the instrument panel of certain information relating to the operation of the engine. Four functions are involved here: The OBD malfunction indicator [MI (Yellow)] for the EOBD (European On Board Diagnostics), the pre/post heating, the e ...

    Wiring diagram
    Security control system LHD LHD : Wiring Diagram For connector terminal arrangements, harness layouts, and alphabets in a (option abbreviation; if not described in wiring diagram), refer to GI-12, "Connector Information/Explanation of Option Abbreviation". RHD RHD : Wirin ...