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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 476 (2004 - Engine Control System - Sedan) >> Trouble Diagnosis >> DTC P1148, P1168: Closed Loop Control >> Overall Function Check >> With GST

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.
  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: Checking Voltage Between ECM Connector Terminals And Ground
G00732674Courtesy of NISSAN MOTOR CO., U.S.A.
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