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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (2004 - Engine Control System - Coupe) >> 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 2004 Infiniti G35. 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] or 16 [HO2S1 (B2) signal] and ground.
    Fig 1: Overall Function Check
    G00720386Courtesy of NISSAN MOTOR CO., U.S.A.
  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 ".
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