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Home >> Infiniti >> 2003 >> I35 >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Control System) >> DTC P1143 & DTC P1163: Ho2S1 >> Overall Function Check >> With GST

With GST

WARNING: This page is about a different car, the 2004 Infiniti I35. 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 91 (bank 1 HO2S1 signal) or 92 (bank 2 HO2S1 signal) and engine 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 one time.
    • The minimum voltage is over 0.1V at least one time.
  4. If NG, go to DIAGNOSTIC PROCEDURE  .
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