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Home >> Infiniti >> 2002 >> I35 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0134: Ho2S1 Circuit No Activity Detected - Bank 1 Or DTC P0154: Ho2S1 Circuit No Activity Detected - Bank 2 >> DTC Confirmation Test (Using Generic Scan Tool)
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DTC Confirmation Test (Using Generic Scan Tool)

NOTE: Use the following test to check overall function of HO2S1 circuit. During this test, 1st trip DTC may not be confirmed.
CAUTION: DO NOT use ECM ground terminals when measuring voltage.
  1. Start engine and warm to normal operating temperature. Measure voltage between ground and ECM terminal No. 91 (bank 1) or No. 92 (bank 2) by backprobing. See Figure and Figure .
  2. While observing voltmeter, increase engine speed to 2000 RPM. Voltage should not remain in the .2-.4 volt range. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE  . If voltage is as specified, system is okay at this time.
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