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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1165 (Engine Control System - Qr25DE) >> DTC P1148: Closed Loop Control >> Overall Function Check (A/T MODELS ULEV AND M/T MODELS) >> With GST
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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 the following with engine speed held at 2, 000 RPM constant under no-load.
    • The voltage should go above 0.70V at least once.
    • The voltage should go below 0.21V at least once.
  4. If NG, go to "DIAGNOSTIC PROCEDURE (A/T MODELS ULEV AND M/T MODELS) ".
    Fig 1: Setting Voltmeter Probes Between ECM Terminal 35 & Ground
    G00778209Courtesy of NISSAN MOTOR CO., U.S.A.
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