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Home >> Infiniti >> 2004 >> I35 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P1143 & DTC P1163: 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 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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