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Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0078 EVT control solenoid valve
DTC Logic

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0078 EX V/T ACT/CIRCB1 (Exhaust valve timing control solenoid valve circuit) An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve.
  • Harness or connectors (Exhaust valve timing control solenoid valve circuit is open or shorted.)
  • Exhaust valve timing control solenoid valve

DTC CONFIRMATION PROCEDURE

1.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.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and let it idle for 5 seconds.
  2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> INSPECTION END

    More about «P0078 EVT control solenoid valve»:

    DTC Logic

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