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Home >> Nissan-Datsun >> 2011 >> Quest SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0448 >> DTC P0448: EVAP Canister Vent Control Valve >> Component Inspection

Component Inspection

  1. CHECK EVAP CANISTER VENT CONTROL VALVE-I
    1. Remove EVAP canister vent control valve from EVAP canister. Refer to "EXPLODED VIEW ".
    2. Check portion (A) of EVAP canister vent control valve for rust.

      Is it rusted? 

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

      NO: GO TO 2.

      Fig 1: Checking EVAP Canister Vent Control Valve-I
      G04886552Courtesy of NISSAN MOTOR CO., U.S.A.
  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.

      Check that new O-ring is installed properly. 

      TERMINAL CONTINUITY REFERENCE CHART

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

      Operation takes less than 1 second. 

    Without CONSULT 

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

      Check that new O-ring is installed properly. 

      Fig 2: Checking Air Passage Continuity
      G04886553Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONTINUITY REFERENCE CHART

      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. 

      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.

      Check that new O-ring is installed properly. 

      TERMINAL CONTINUITY REFERENCE CHART

      Condition VENT CONTROL/V Air passage continuity between (A) and (B)
      ON No
      OFF Yes

      Operation takes less than 1 second. 

    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.

      Check that new O-ring is installed properly. 

      Fig 3: Checking Air Passage Continuity
      G04886553Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONTINUITY REFERENCE CHART

      Condition Air passage continuity between (A) and (B)
      12 V direct current supply between terminals (1) and (2) No
      OFF Yes

      Operation takes less than 1 second. 

      Is the inspection result normal? 

      YES: INSPECTION END

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