Nissan Murano: Dtc/circuit Diagnosis / P0454 Evap Control System Pressure Sensor

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P0454 Evap Control System Pressure Sensor

DTC Description

DTC DETECTION LOGIC

ECM detects a sloshing signal from the EVAP control system pressure sensor.

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0454

EVAP SYS PRES SEN

(Evaporative emission system pressure sensor/switch range/performance) 		Diagnosis condition —
Signal (terminal) Voltage signal transmitted from EVAP control system pressure sensor to ECM
Threshold ECM detects a sloshing signal from the EVAP control system pressure sensor
Diagnosis delay time —

POSSIBLE CAUSE

  • Harness or connectors

    (EVAP control system pressure sensor circuit is shorted.)

  • EVAP control system pressure sensor

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

NOTE:

Never remove fuel filler cap during 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.

With CONSULT>>

GO TO 2.

Without CONSULT>>

GO TO 5.

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 Diagnosis Procedure.

NO>>

GO TO 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.

PERFORM DTC CONFIRMATION PROCEDURE-3

With CONSULT

Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: INSPECTION END

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 Diagnosis Procedure.

NO>>

GO TO 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 Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

  1. Disconnect EVAP control system pressure sensor harness connector.

  2. Check that water is not inside connectors.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

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.

    + − Voltage (V)
    EVAP control system pressure sensor
    Connector Terminal
    B36 3 Ground Approx. 5

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 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.

    EVAP control system pressure sensor ECM Continuity
    Connector Terminal Connector Terminal
    B36 3 E32 125 Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

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.

    EVAP control system pressure sensor ECM Continuity
    Connector Terminal Connector Terminal
    B36 1 E32 148 Existed

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

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check EVAP control system pressure sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

Component Inspection

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

  1. Turn ignition switch OFF.

  2. Remove EVAP control system pressure sensor with its harness connector. Refer to Removal and Installation.

    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 terminals under the following conditions.

    ECM

    Applied vacuum kPa

    (kg/cm2, psi)     		Voltage
    Connector + –
    Terminal Terminal
    E32 121 148 Not applied 1.8 - 4.8 V
    -26.7 (-0.272, -3.87) 2.1 to 2.5 V lower than above value

    CAUTION:

    • Always calibrate the vacuum pump gauge when using it.

    • Never apply below -93.3 kPa (-0.952 kg/cm2, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2, 14.69 psi).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

    P0452 Evap Control System Pressure Sensor

    DTC Description DTC DETECTION LOGICAn excessively low voltage from the sensor is sent to ECM. DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P0452 EVAP SYS PRES SEN (Evaporative emission system pressure sensor/switch low) Diagnosis condition — Signal (terminal) Voltage signal transmitted from EVAP control system pressure sensor to ECM Threshold An excessively low voltage from the sensor is sent to ECM Diagnosis delay time — POSSIBLE CAUSE Harness or connectors (EVAP control system pressure sensor circuit is open or shorted...

    P0456 Evap Control System

    DTC Description DTC DETECTION LOGICThis diagnosis detects leaks in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the negative pressure caused by decrease of fuel temperature in the fuel tank after turning ignition switch OFF...

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