Nissan Sentra manuals

Nissan Sentra Service Manual: P0014  EVT control

DTC Logic

DTC DETECTION LOGIC

NOTE:

DTC No.

CONSULT screen terms (Trouble diagnosis content)

DTC detecting condition

Possible cause

P0014 EXH/V TIM CONT-B1 (″B″ Camshaft position - timing over-advanced or system performance bank 1) There is a gap between angle of target and phase-control angle degree.
  • Crankshaft position sensor (POS)
  • Camshaft position sensor (PHASE)
  • Exhaust valve timing control position sensor
  • Exhaust valve control solenoid valve
  • Accumulation of debris to the signal pickup portion of the camshaft
  • Timing chain installation
  • Foreign matter caught in the oil groove for exhaust valve timing control

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is between 10 V and 16 V at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT


  1. Turn ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT
  2. Start engine and warm it up to the normal operating temperature.
  3. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady as possible.


  1. Let engine idle for 10 seconds.
  2. Check 1st trip DTC.

Follow the procedure “With CONSULT” above. With GST


Follow the procedure “With CONSULT” above.

Is 1st trip DTC detected? YES >> Proceed to EC-174, "Diagnosis Procedure" NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT


  1. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
  2. Maintain the following conditions for at least 20 consecutive seconds.

CAUTION:


CAUTION:

Always drive at a safe speed.

  1. Check 1st trip DTC.

Follow the procedure “With CONSULT” above. With GST


Follow the procedure “With CONSULT” above.

Is 1st trip DTC detected? YES >> Proceed to EC-174, "Diagnosis Procedure" NO >> INSPECTION END

Diagnosis Procedure

1.CHECK OIL PRESSURE WARNING LAMP

  1. Start engine
  2. Check oil pressure warning lamp and confirm it is not illuminated.

Is oil pressure warning lamp illuminated? YES >> Check the engine oil level. Refer to LU-7, "Inspection".

NO >> GO TO 2.

2.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE


2.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE

Check the exhaust valve timing control solenoid valve. Refer to EC-172, "Component Inspection".

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

NO >> Replace exhaust valve timing control solenoid valve. Refer to EM-48, "Exploded View".

3.CHECK CRANKSHAFT POSITION SENSOR (POS)

Check the crankshaft position sensor (POS). Refer to EC-279, "Component Inspection [CKP Sensor (POS)]".

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

NO >> Replace crankshaft position sensor (POS). Refer to EM-33, "Exploded View".

4.CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR

Check the exhaust valve timing control position sensor. Refer to EC-282, "Component Inspection [CMP Sensor (PHASE)]".

Is the inspection result normal? YES >> GO TO 5.

NO >> Replace exhaust valve timing control position sensor. Refer to EM-48, "Exploded View".

5.CHECK CAMSHAFT (EXH)

Check the following.

Is the inspection result normal? YES >> GO TO 6.

NO >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to EM-60, "Removal and Installation".

6.CHECK TIMING CHAIN INSTALLATION


6.CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.

Are there any service records that may cause timing chain misaligned? YES >> Check timing chain installation. Refer to EM-49, "Removal and Installation".

NO >> GO TO 7.

7.CHECK LUBRICATION CIRCUIT

Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Clean lubrication line.

Component Inspection

1.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-1

  1. Turn ignition switch OFF.
  2. Disconnect exhaust valve timing control solenoid valve harness connector.
  3. Check resistance between exhaust valve timing control solenoid valve terminals as per the following.

Is the inspection result normal?


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

NO >> Replace exhaust valve timing control solenoid valve. Refer to EM-48, "Exploded View".

2.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-2

  1. Remove exhaust valve timing control solenoid valve. Refer to EM-48, "Exploded View".
  2. Provide 12 V DC between exhaust valve timing control solenoid valve terminals 1 and 2, and then interrupt it. Check that the plunger moves as shown in the figure.

CAUTION:


CAUTION:

Do not apply 12 V DC continuously for 5 seconds or more.

Doing so may result in damage to the coil in exhaust valve timing control solenoid valve.

NOTE:

Always replace O-ring when exhaust valve timing control solenoid valve is removed.

Is the inspection result normal? YES >> INSPECTION END

NO >> Replace exhaust valve timing control solenoid valve. Refer to EM-48, "Exploded View".

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