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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 412 (Engine Control System) >> DTC P1143, P1163: Ho2S1 >> Overall Function Check >> With GST
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With GST

WARNING: This page is about a different car, the 2004 Infiniti M45. 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 114 [HO2S1(B1) signal] or 115 [HO2S1(B2) signal] and 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: Checking Voltage Between ECM Terminals & Ground
    G00796285Courtesy of NISSAN MOTOR CO., U.S.A.
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