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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1976 (Engine Control System - VK45DE) >> DTC P1148, P1168: Closed Loop Control >> Overall Function Check >> With GST
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With GST

WARNING: This page is about a different car, the 2005 Infiniti FX45. 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 16 [HO2S1 (B1) signal] or 35 [HO2S1 (B2) signal] and 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  ".
    Fig 1: Setting Voltmeter Probes Between ECM Terminal 16 [Ho2S1 (B1) Signal] And Ground
    G02362024Courtesy of NISSAN MOTOR CO., U.S.A.
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