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Home >> Nissan-Datsun >> 2004 >> Frontier Base, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Control System - VG33ER) >> DTC P1456: EVAP Control System >> Overall Function Check

Overall Function Check

WARNING: This page is about a different variant/trim than selected.

WITH GST 

Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st trip 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.
  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 ".

    Fig 1: Attaching EVAP Service Port Adapter Securely To EVAP Service Port
    G00768442Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE: For more information, refer to GST instruction manual.
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