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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 Through P0456 >> DTC P0448: EVAP Canister Vent Control Valve >> Component Inspection
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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 "EXPLODED VIEW ".
    3. Check portion (A) of EVAP canister vent control valve for being rusted.
      Fig 1: Checking EVAP Canister Vent Control Valve
      G08649247Courtesy of NISSAN NORTH AMERICA, INC.

      Is it rusted? 

      YES: Replace EVAP canister vent control valve. Refer to "EXPLODED VIEW ".

      NO: GO TO 2.

  2. CHECK EVAP CANISTER VENT CONTROL VALVE-II 

    With CONSULT 

    1. Reconnect harness connectors disconnected.
    2. Turn ignition switch ON.
    3. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
    4. Check air passage continuity and operation delay time.

      Make sure that new O-ring is installed properly. 

      Condition VENT CONT/V Air passage continuity between (A) and (B)
      ON Not existed
      OFF Existed

      Operation takes less than 1 second. 

      Fig 2: Identifying EVAP Canister Purge Volume Control Solenoid Valve Ports
      G08649248Courtesy of NISSAN NORTH AMERICA, INC.

    Without CONSULT 

    1. Disconnect EVAP canister vent control valve harness connector.
    2. Check air passage continuity and operation delay time under the following conditions.

      Make sure that new O-ring is installed properly. 

      Condition Air passage continuity between (A) and (B)
      12 V direct current supply between terminals 1 and 2 Not existed
      OFF Existed

      Operation takes less than 1 second. 

      Fig 3: Identifying EVAP Canister Purge Volume Control Solenoid Valve Ports
      G08649249Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: GO TO 3.

  3. CHECK EVAP CANISTER VENT CONTROL VALVE-III 

    With CONSULT 

    1. Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
    2. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
    3. Check air passage continuity and operation delay time.

      Make sure that new O-ring is installed properly. 

      Condition VENT CONT/V Air passage continuity between (A) and (B)
      ON Not existed
      OFF Existed

      Operation takes less than 1 second. 

      Fig 4: Identifying EVAP Canister Purge Volume Control Solenoid Valve Ports
      G08649250Courtesy of NISSAN NORTH AMERICA, INC.

    Without CONSULT 

    1. Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
    2. Check air passage continuity and operation delay time under the following conditions.

      Make sure that new O-ring is installed properly. 

      Condition Air passage continuity between (A) and (B)
      12 V direct current supply between terminals 1 and 2 Not existed
      OFF Existed

      Operation takes less than 1 second. 

      Fig 5: Identifying EVAP Canister Purge Volume Control Solenoid Valve Ports
      G08649251Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Replace EVAP canister vent control valve. Refer to "EXPLODED VIEW ".