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Home › Nissan-Datsun › 2002 › Sentra SE-R, Standard › Repair and Diagnosis › External Pages › Different car › Section 1147 (Engine Control System - Qr25DE) › DTC P1143: Ho2S1 › Overall Function Check › With GST

With GST

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  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 over 0.6V at least 1 time.
    • The minimum voltage is over 0.1V at least 1 time.
  4. If NG, go to "DIAGNOSTIC PROCEDURE ".
Fig 1: Setting Voltmeter Probes Between ECM Terminal 35 & Ground
G00778145Courtesy of NISSAN MOTOR CO., U.S.A.
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