Question edited for clarity and toss in some CAPS.
There is nothing that backs up memory. When you disconnect the battery, all memory is lost, which is why it is important not to do it!
You don't tell us the model? Is it a secret? All questions need 'year make model' as the FIRST 3 words.
If your have a 1999 Infinity I30, the ECM Fuse is Fuse 58.
58
10
Engine Control Module (ECCS), Mass Air Flow Sensor, Crankshaft Position Sensor, Idle Air Control Valve (IACV-ACC) Solenoid Valve, Ignition Coils, EGR, EGR Volume Control Valve, EVAP Control System Pressure Sensor
Infiniti i30 (A32; 1995-1999) fuses and relays
Fuse Box Diagrams
https://fuse-box.info > infiniti > infiniti-i30-a32-1995-...
Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 (A32; 1995, 1996, 1997, 1998, 1999).
Infiniti i30, i35 (A33; 1998-2004) fuses and relays
Fuse Box Diagrams
https://fuse-box.info > infiniti > infiniti-i30-i35-a33-1...
Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 / i35 (A33; 1998, 1999, 2000, 2001, 2002, 2003, 2004).
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