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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1456: EVAP Control System >> Diagnostic Procedure >> 13. Check EVAP Canister Purge Volume Control Solenoid Valve Operation
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13. Check EVAP Canister Purge Volume Control Solenoid Valve Operation

With CONSULT-II 

  1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
  2. Start engine.
  3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
  4. Touch "Qu" on CONSULT-II screen to increase "PURG VOL CONT/V" opening to 100%.
  5. Check vacuum hose for vacuum when revving engine up to 2,000 RPM.
    1. Vacuum should exist. 

OK or NG 

OK: GO TO 16.

NG: GO TO 15.