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Home >> Infiniti >> 2023 >> QX60 Autograph, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 6) >> DTC/Circuit Diagnosis >> DTC P0450: EVAP Control System Pressure Sensor >> Component Inspection

Component Inspection

  1. CHECK EVAP CANISTER VENT CONTROL VALVE-I 
      1. Turn ignition switch OFF.
      2. Remove EVAP canister vent control valve from EVAP canister. Refer to Removal and Installation .
      3. Check portion SYMBOL of EVAP canister vent control valve for rust.
        GNSDB45575Courtesy of NISSAN

    Is it rusted?

    YES>>

    Replace EVAP canister vent control valve. Refer to Removal and Installation .

    NO>>

    GO TO 2.

  2. CHECK EVAP CANISTER VENT CONTROL VALVE-II 
    1. SYMBOL With CONSULT
      1. Reconnect harness connectors disconnected.
      2. Turn ignition switch ON.
      3. On CONSULT screen, select "ENGINE">>"Active Test">>"VENT CONTROL/V".
      4. Check air passage continuity and operation delay time.
        GNSDB45579Courtesy of NISSAN

        Make sure that new O-ring is installed properly.

        Condition VENT CONT/V Air passage continuity between SYMBOL and SYMBOL
        ON Not existed
        OFF Existed

        Operation takes less than 1 second.

    2. SYMBOL Without CONSULT
      1. Disconnect EVAP canister vent control valve harness connector.
      2. Check air passage continuity and operation delay time under the following conditions.
        GNSDB45579Courtesy of NISSAN

        Make sure that new O-ring is installed properly.

        Condition Air passage continuity between SYMBOL and SYMBOL
        12 V direct current supply between terminals 1 and 2 Not existed
        OFF Existed

        Operation takes less than 1 second.

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Replace EVAP canister vent control valve. Refer to Removal and Installation .

  3. CHECK EVAP CANISTER VENT CONTROL VALVE-III 
    1. SYMBOL With CONSULT
      1. Clean the air passage [portion SYMBOL to SYMBOL ] of EVAP canister vent control valve using an air blower.
      2. On CONSULT screen, select "ENGINE">>"Active Test">>"VENT CONTROL/V".
      3. Check air passage continuity and operation delay time.
        GNSDB45579Courtesy of NISSAN

        Make sure that new O-ring is installed properly.

        Condition VENT CONT/V Air passage continuity between SYMBOL and SYMBOL
        ON Not existed
        OFF Existed

        Operation takes less than 1 second.

    2. SYMBOL Without CONSULT
      1. Clean the air passage [portion SYMBOL to SYMBOL ] of EVAP canister vent control valve using an air blower.
      2. Check air passage continuity and operation delay time under the following conditions.
        GNSDB45579Courtesy of NISSAN

        Make sure that new O-ring is installed properly.

        Condition Air passage continuity between SYMBOL and SYMBOL
        12 V direct current supply between terminals 1 and 2 Not existed
        OFF Existed

        Operation takes less than 1 second.

    Is the inspection result normal?

    YES>>

    INSPECTION END

    NO>>

    Replace EVAP canister vent control valve. Refer to Removal and Installation .

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