With GST

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Start engine and warm it up to normal operating temperature.
Set voltmeter probes between ECM terminal 114 [HO2S1(B1) signal] or 115 [HO2S1(B2) signal] and ground.
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 1 time.
- The minimum voltage is over 0.1V at least 1 time.
If NG, go to DIAGNOSTIC PROCEDURE .

Fig 1: Checking Between ECM Terminal 114 [HO2S1(B1) Signal] Or 115 [HO2S1(B2) Signal] & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.