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With GST

Start engine and let it idle.
Check voltage between ECM terminal 71 (battery current sensor signal) and ground for 10 seconds.
The voltage should be above 2.3V at least once.

Fig 1: Checking Voltage Between ECM Connector Terminal 71 (Battery Current Sensor Signal) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
If NG, go to DIAGNOSTIC PROCEDURE .