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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control System >> DTC P0133, P0153: 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 114 [HO2S1(B1) signal] or 115 [HO2S1(B2) signal] and ground.
    Fig 1: Checking Voltmage Between ECM Terminals & Ground
    G00795825Courtesy 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 fluctuates between 0 to 0.3V and 0.6 to 1.0V more than 5 times within 10 seconds.

      1 time: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V 

      2 times: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V 

    • If NG, go to DIAGNOSTIC PROCEDURE .
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