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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1143 Or DTC P1163: Ho2S1 >> DTC Confirmation Test (Using Generic Scan Tool)
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DTC Confirmation Test (Using Generic Scan Tool)

WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the following test to check overall function of front HO2S 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. On 2.5L, measure voltage between ground and ECM terminal No. 92 by backprobing. See Figure and Figure . On 3.5L, measure voltage between ground and ECM terminal No. 91 (bank 1) or No. 92 (bank 2) by backprobing.
  2. On all models, while observing voltmeter, increase engine speed to 2000 RPM. The following conditions should exist:
    • Maximum voltage should be more than .6 volt at least once.
    • Minimum voltage should be more than .1 volt at least once.

    If voltage is not as specified, go to appropriate DIAGNOSTIC PROCEDURE. If voltage is as specified, system is okay at this time.

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