Nissan Murano: Dtc/circuit Diagnosis / P0452 Evap Control System Pressure Sensor

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P0452 Evap Control System Pressure Sensor

DTC Description

DTC DETECTION LOGIC

An 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.)

  • EVAP control system pressure sensor

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following 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:

Always perform test at a temperature of 5°C (41°F) or more.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

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

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

  3. Turn ignition switch ON.

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

  5. Turn ignition switch ON.

  6. Select “DATA MONITOR” mode with CONSULT.

  7. Check that “FUEL T/TMP SE” is more than 0°C (32°F).

  8. Start engine and wait at least 20 seconds.

  9. Check 1st trip DTC.

With GST

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

  2. Set voltmeter probes to ECM harness connector terminals under the following conditions.

    ECM
    Connector + –
    Terminal
    E32 128 148

  3. Check that the voltage is less than 4.2 V.

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

  5. Turn ignition switch ON.

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

  7. Start engine and wait at least 20 seconds.

  8. 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 CONNECTOR

  1. Disconnect EVAP control system pressure sensor harness connector.

  2. Check that water is not inside connector.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness connector.

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 harness connector.

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 open circuit, short to ground or short to power in harness or connectors.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT

  1. 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 2 E32 121 Existed

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

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair open circuit, short to ground or short to power in harness or connectors.

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.

    P0451 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 P0451 EVAP SYS PRES SEN (EVAP control system pressure sensor performance) Diagnosis condition Ignition switch ON Signal (terminal) EVAP control system pressure sensor signal ECM (Built in barometric pressure sensor) Threshold ECM detects a state that the pressure difference remains the threshold value or more for continuously for 5 seconds or more under the condition that the pressure of the EVAP control system pressure sensor and that of the barometric pressure sensor are equal...

    P0454 Evap Control System Pressure Sensor

    DTC Description DTC DETECTION LOGICECM 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...

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