Nissan Rogue (T33) 2021-Present Service Manual: P0078 Evt Control Solenoid Valve

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0078 Evt Control Solenoid Valve

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0078 00

EX V/T ACT/CIRC-B1

(Exhaust valve control solenoid circuit bank 1) 		Diagnosis condition Engine running
Signal (terminal) Exhaust valve timing control solenoid valve signal
Threshold An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve
Diagnosis delay time 1 second or more

POSSIBLE CAUSE

  • Harness or connectors (Exhaust valve timing control solenoid valve circuit is open or shorted.)

  • Exhaust valve timing control solenoid valve

FAIL-SAFE

Engine Control System

Fail safe mode Nissan Ariya Vehicle behavior
Device fix mode

  • This mode fixes the electric IVT control actuator and the EVT control solenoid valve in the reference position.

  • A control signals is not transmitted to the EGR volume control valve and the EGR volume control is deactivated.

Stop/Start System

When a DTC is detected, the stop/start indicator lamp blinks slowly and the stop/start system operation is prohibited.

When ECM detects error while operating the stop/start system, ECM restarts the engine.

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.

  2. Turn ignition switch ON.

  3. Turn ignition switch OFF and wait at least 10 seconds.

>>

GO TO2.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and warm it up to normal operating temperature.

  2. Drive the Nissan Ariya vehicle for at least 5 seconds under the following conditions:

    CAUTION:

    Always drive vehicle at safe speed.

    Selector lever Suitable position
    Nissan Ariya Vehicle speed 40 km/h (25 MPH) or more

    NOTE:

    • The gear must be fixed while driving the Nissan Ariya vehicle.

    • Keep the accelerator pedal as steady as possible during cruising.

  3. Check 1st trip DTC.

Is the DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY

  1. Turn ignition switch OFF.

  2. Disconnect exhaust valve timing (EVT) control solenoid valve harness connector.

  3. Turn ignition switch ON.

  4. Check the voltage between EVT control solenoid valve harness connector and ground.

    + − Voltage
    EVT control solenoid valve
    Connector Terminal
    F66 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect IPDM E/R harness connector.

  3. Check the continuity between EVT control solenoid valve harness connector and IPDM E/R harness connector.

    EVT control solenoid valve IPDM E/R Continuity
    Connector Terminal Connector Terminal
    F66 1 F35 66 Existed

  4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES>>

Perform trouble diagnosis for the power supply circuit.

NO>>

Repair or replace malfunctioning part.

CHECK EVT CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect ECM harness connector.

  3. Check the continuity between EVT control solenoid valve harness connector and ECM harness connector.

    EVT control solenoid valve ECM Continuity
    Connector Terminal Connector Terminal
    F66 2 F71 125 Existed

  4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning part.

CHECK EVT CONTROL SOLENOID VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace malfunctioning EVT control solenoid valve. Refer to Exploded View.

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