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Home >> Nissan-Datsun >> 2004 >> Quest SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P1273, P1283: A/F Sensor 1 >> DTC Confirmation Procedure >> Testing Condition: >> With GST
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With GST

  1. Start engine and warm it up to normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Disconnect mass air flow sensor harness connector.
    Fig 1: Identifying Mass Air Flow Sensor
    G00775747Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Start engine and let it idle for at least 5 seconds.
  5. Stop engine and reconnect mass air flow sensor harness connector.
  6. Select MODE 3 with GST and make sure that DTC P0102 is detected.
  7. Select MODE 4 with GST and erase the DTC P0102.
  8. Start engine and keep the engine speed between 3,500 and 4,000 RPM for 1 minute under no load.
  9. Let engine idle for 1 minute.
  10. Keep engine speed between 2,500 and 3,000 RPM for 13 minutes.
  11. Select MODE 7 with GST.

    If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE  .

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