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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> Engine (ECM) >> DTC P0453: EVAP Control System Pressure Sensor >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR 
    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 harness connector.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch ON.
    2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
      EVAP control system pressure sensor Ground Voltage (V)
      Connector Terminal
      C17 3 Ground Approx. 5

    Is the inspection result normal?

    YES>>

    GO TO 6.

    NO>>

    GO TO 3.

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II 
    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
      C17 3 E20 125 Existed

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    GO TO 4.

  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open between ECM and EVAP control system pressure sensor
    • Loose or poor connection for each connector and harness

    >>

    Repair open circuit.

  5. CHECK SENSOR POWER SUPPLY 3 CIRCUIT 

    Perform Refer to Diagnosis Procedure . Is the inspection result normal?

    YES>>

    Perform the trouble diagnosis for power supply circuit. Refer to Diagnosis Procedure .

    NO>>

    Repair or replace error-detected parts.

  6. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    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
      C17 1 E20 148 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES>>

    GO TO 8.

    NO>>

    GO TO 7.

  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between EVAP control system pressure sensor and ECM
    • Loose or poor connection for each connector and harness

    >>

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

  8. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    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
      C17 2 E20 121 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES>>

    GO TO 10.

    NO>>

    GO TO 9.

  9. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between EVAP control system pressure sensor and ECM
    • Loose or poor connection for each connector and harness

    >>

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

  10. CHECK RUBBER TUBE 
    1. Disconnect rubber tube connected to EVAP canister vent control valve. Refer to EVAP CANISTER : Hydraulic Layout .
    2. Check the rubber tube for clogging.

    Is the inspection result normal?

    YES>>

    GO TO 11.

    NO>>

    Clean the rubber tube using an air blower, repair or replace rubber tube.

  11. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Refer to Component Inspection . Is the inspection result normal?

    YES>>

    GO TO 12.

    NO>>

    Replace EVAP canister vent control valve. Refer to EVAP CANISTER : Exploded View .

  12. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to Component Inspection . Is the inspection result normal?

    YES>>

    GO TO 13.

    NO>>

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

  13. CHECK IF EVAP CANISTER IS SATURATED WITH WATER 
    1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
    2. Check if water will drain from the EVAP canister (1).
      GNSDB145921Courtesy of NISSAN NORTH AMERICA, INC.
      • EVAP canister vent control valve (2)

    Does water drain from EVAP canister?

    YES>>

    GO TO 14.

    NO>>

    GO TO 16.

  14. CHECK EVAP CANISTER 

    Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

    The weight should be less than 2.5 kg (5.5 lb).

    Is the inspection result normal?

    YES>>

    GO TO 16.

    NO>>

    GO TO 15.

  15. DETECT MALFUNCTIONING PART 

    Check the following.

    • EVAP canister for damage
    • EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

    >>

    Repair hose or replace EVAP canister. Refer to EVAP CANISTER : Hydraulic Layout .

  16. CHECK INTERMITTENT INCIDENT 

    Refer to Inspection .

    >>

    INSPECTION END

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