2. Check ECM Power Supply Circuit-I

1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 53 and ground with CONSULT-II or tester.
   1. Voltage: Battery voltage 

OK or NG 

OK: GO TO 4. CHECK GROUND CONNECTIONS .

NG: GO TO 3.

Fig 1: ECM POWER SUPPLY CIRCUIT-I

Courtesy of NISSAN MOTOR CO., U.S.A.