LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0453: EVAP Control System Pressure Sensor >> Diagnosis Procedure >> Diagnostic Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Test

  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 STEP 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 STEP  6.

    NO 

    GO TO STEP 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 STEP 5  .

    NO 

    GO TO STEP 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 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 STEP 8  .

    NO 

    GO TO STEP 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 STEP 10  .

    NO 

    GO TO STEP 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 HYDRAULIC LAYOUT .
    2. Check the rubber tube for clogging.

    Is the inspection result normal?

    YES 

    GO TO STEP 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 (EVAP CANISTER VENT CONTROL VALVE) .

    Is the inspection result normal?

    YES 

    GO TO STEP 12  .

    NO 

    Replace EVAP canister vent control valve. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

  12. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    Refer to COMPONENT INSPECTION (EVAP CONTROL SYSTEM PRESSURE SENSOR) .

    Is the inspection result normal?

    YES 

    GO TO STEP 13  .

    NO 

    Replace EVAP control system pressure sensor. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

  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).
      G07026343Courtesy of NISSAN NORTH AMERICA, INC.
      • EVAP canister vent control valve (2)

    Does water drain from EVAP canister?

    YES 

    GO TO STEP 14  .

    NO 

    GO TO STEP  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 STEP 16  .

    NO 

    GO TO STEP 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 HYDRAULIC LAYOUT .

  16. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

scientia non olet · About LEMON Manuals