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Nissan Rogue Service Manual: P0451 EVAP control system pressure sensor

Nissan Rogue Service Manual / Engine / Engine Control System / DTC/Circuit diagnosis / P0451 EVAP control system pressure sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition
P0451 EVAP SYS PRES SEN (Evaporative emission system pressure sensor/switch range/performance) ECM detects a sloshing signal from the EVAP control system pressure sensor

POSSIBLE CAUSE

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

NOTE: Never remove fuel filler cap during 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.

With CONSULT>>GO TO 2.

Without CONSULT>>GO TO 5.

2.PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

  1.  Start engine and let it idle for least 40 seconds.

    NOTE: Do not depress accelerator pedal even slightly.

  2.  Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-328, "Diagnosis Procedure".

NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

  1.  Select “EVAP DIAG READY” in “DATA MONITOR” mode of “ENGINE”.
  2.  Let it idle until “OFF” of “EVAP DIAG READY” changes to “ON”.

    NOTE: It will take at most 2 hours until “OFF” of “EVAP DIAG READY” changes to “ON”.

  3.  Turn ignition switch OFF and wait at least 90 minutes.

    NOTE: Never turn ignition switch ON during 90 minutes.

  4. Turn ignition switch ON.
  5. Select “EVAP LEAK DIAG” in “DATA MONITOR” mode of “ENGINE”.
  6. Check that “EVAP LEAK DIAG” indication.

Which is displayed on CONSULT? CMPLT>> GO TO 4.

YET >> 1. Perform DTC CONFIRMATION PROCEDURE again.

2. GO TO 1.

4.PERFORM DTC CONFIRMATION PROCEDURE-3

With CONSULT

Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-328, "Diagnosis Procedure".

NO >> INSPECTION END

5.PERFORM DTC CONFIRMATION PROCEDURE-4

With GST

  1.  Start engine and let it idle for least 40 seconds.

    NOTE: Do not depress accelerator pedal even slightly.

  2.  Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-328, "Diagnosis Procedure".

NO >> GO TO 6.

6.PERFORM DTC CONFIRMATION PROCEDURE-5

With GST

  1.  Let it idle for at least 2 hours.
  2.  Turn ignition switch OFF and wait at least 90 minutes.

    NOTE: Never turn ignition switch ON during 90 minutes.

  3.  Turn ignition switch ON.
  4.  Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-328, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

  1.  Turn ignition switch OFF.
  2.  Disconnect EVAP control system pressure sensor harness connector.
  3.  Check sensor harness connector for water.

Water should not exist.

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

NO >> Repair or replace harness connector.

2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY

  1.  Turn ignition switch ON.
  2.  Check the voltage between EVAP control system pressure sensor harness connector and ground.

Check EVAP control system pressure sensor power supply

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

NO >> GO TO 3.

3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2.  Disconnect ECM harness connector.
  3.  Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

Check EVAP control system pressure sensor power supply circuit

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

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts

4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT

  1.  Turn ignition switch OFF.
  2.  Disconnect ECM harness connector.
  3.  Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

Check EVAP control system pressure sensor ground circuit

  1. Also check harness for short to power.

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

NO >> Repair or replace error-detected parts.

5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT

  1.  Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

Check EVAP control system pressure sensor signal circuit

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

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

NO >> Repair or replace error-detected parts.

6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check the EVAP control system pressure sensor. Refer to EC-330, "Component Inspection".

Is the inspection result normal? YES >> GO TO 7.

NO >> Replace EVAP control system pressure sensor. Refer to FL-22, "Removal and Installation".

7.CHECK INTERMITTENT INCIDENT

Refer to GI-41, "Intermittent Incident".

>> INSPECTION END

Component Inspection

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

  1.  Turn ignition switch OFF.
  2.  Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.

    Always replace O-ring with a new one.

  3.  Install a vacuum pump to EVAP control system pressure sensor.
  4.  Turn ignition switch ON and check output voltage between ECM harness connector and ground under the following conditions.

Check EVAP control system pressure sensor

CAUTION:

Is the inspection result normal?

YES >> INSPECTION END

NO >> Replace EVAP control system pressure sensor. Refer to FL-22, "Removal and Installation".

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