DTC Confirmation Test

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before proceeding, ensure battery voltage is more than 11 volts at idle.

With CONSULT-II

Start engine and warm to normal operating temperature. Select DATA MONITOR mode with CONSULT-II. While holding engine speed at 2000 RPM, observe HO2S1 (B1)/(B2) voltage with CONSULT-II. Voltage should go above .70 volt at least once. Voltage should go below .21 volt at least once. If voltage is as specified, go to next step. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE .
Let engine idle for at least 5 minutes. Maintain the following conditions for at least 50 consecutive seconds:
- B/FUEL SCHDL: more than 3.3 msec (A/T) or more than 2.8 msec (M/T).
- ENG SPEED: more than 1750 RPM (A/T) or more than 2100 RPM (M/T).
- VHCL SPEED SE: more than 43 MPH.
NOTE: DTC P0133 and/or P0153 may be displayed on CONSULT-II during this test. If engine speed limit is exceeded, return to step 2 .

If DTC is detected, go to DIAGNOSTIC PROCEDURE . If DTC is not detected, system is okay at this time.

NOTE: Use the following test to check overall function of closed loop fuel control. During this test, DTC may not be confirmed.

CAUTION: DO NOT use ECM ground terminals when measuring voltage.

With Generic Scan Tool (Overall Function Check)

Start engine and warm to normal operating temperature. Measure voltage between ground and ECM terminal No. 94 (bank 1) or No. 62 (bank 2) by backprobing. See Figure and Figure .
Monitor voltmeter with engine at 2000 RPM. Voltage should be less than .21 volt at least once and more than .70 volt at least once. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE . If voltage is as specified, system is okay at this time.