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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Qr25DE >> DTC P1144: Ho2S1 >> Overall Function Check >> With GST
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With GST

  1. Start engine and warm it up to normal operating temperature.
  2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] and engine ground.
  3. Check one of the following with engine speed held at 2, 000 RPM constant under no load.
    • The maximum voltage is below 0.8V at least 1 time.
    • The minimum voltage is below 0.35V at least 1 time.
  4. If NG, go to "DIAGNOSTIC PROCEDURE "
    Fig 1: Setting Voltmeter Probes Between ECM Terminal 35 & Ground
    G00778163Courtesy of NISSAN MOTOR CO., U.S.A.
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