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Home › Infiniti › 2005 › Q45 › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P0441 To P1168 › DTC P1148, P1168: Closed Loop Control › DIAGNOSTIC TROUBLE CODES Confirmation Procedure › With CONSULT-II

With CONSULT-II

  1. Start engine and warm it up to normal operating temperature.
  2. Select "DATA MONITOR" mode with CONSULT-II.
  3. Hold engine speed at 2, 000 rpm and check one of the following.
    • "HO2S1 (B1)/(B2)" voltage should go above 0.70V at least once.
    • "HO2S1 (B1)/(B2)" voltage should go below 0.21V at least once.

    If the check result is NG, perform "DIAGNOSTIC PROCEDURE ".

    If the check result is OK, perform the following step.

  4. Let engine idle at least 5 minutes.
  5. Maintain the following condition at least 50 consecutive seconds.
    Fig 1: Display Data Monitor Mode
    G02376022Courtesy of NISSAN MOTOR CO., U.S.A.
    TESTING CONDITIONS

    B/FUEL SCHDL 4.0 msec or more
    ENG SPEED More than 1, 300 rpm
    Selector lever Suitable position
    VHCL SPEED SE More than 70 km/h (43 MPH)

    During this test, P0132 and/or P0152 may be displayed on CONSULT-II screen.

  6. If DTC is detected, go to "DIAGNOSTIC PROCEDURE ".
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