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Home >> Infiniti >> 2004 >> I35 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P0456: EVAP Control System >> Overall Function Check
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Overall Function Check

WITH GST 

Use this procedure to check the overall function of the EVAP very small leak function. During this check, a DTC might not be confirmed.

CAUTION:
  • Never use compressed air, doing so may damage the EVAP system.
  • Do not start engine.
  • Do not exceeded 4.12 kPa (0.042 kg/cm2 , 0.6 psi).
  1. Attach the EVAP service port adapter securely to the EVAP service port. See Figure .
  2. Set the pressure pump and a hose.
  3. Also set a vacuum gauge via 3-way connector and a hose.
  4. Turn ignition switch ON.
  5. Connect GST and select mode 8.
  6. Using mode 8 control the EVAP canister vent control valve (close) and vacuum cut valve bypass valve (open).
  7. Apply pressure and make sure the following conditions are satisfied.

    Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg) 

    Time to be waited after the pressure drawn in to the EVAP system and the pressure to be dropped: 60 seconds and the pressure should not be dropped more than 0.4 kPa (3 mmHg, 0.12 inHg) 

    If NG, go to diagnostic procedure, OVERALL FUNCTION CHECK  .

    NOTE: For more information, refer to GST instruction manual.
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