Overall Function Check

Use this procedure to check the overall function of the closed loop control. During this check, a DTC might not be confirmed.

WITH GST 

1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] and ground.
   Fig 1: Checking Voltmeter Probes Between ECM Terminal 35 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check the following with engine speed held at 2, 000 rpm constant under no-load.
   • The voltage should go above 0.70V at least once.
   • The voltage should go below 0.21V at least once.
4. If NG, go to "DIAGNOSTIC PROCEDURE ".