IVIS (INFINITI Vehicle Immobilizer System-NATS): Description

• If the security indicator lights up with the ignition switch in the ON position or "NATS MALFUNCTION" is displayed on "SELF-DIAG RESULTS" screen, perform self-diagnostic results mode with CONSULT-III using NATS program card.  Refer to "IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS) ".
• Confirm no self-diagnostic results of IVIS (NATS) is displayed before touching "ERASE" in "SELF-DIAG RESULTS" mode with CONSULT-III. 
• When replacing ECM, initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs must be carried out with CONSULT-III using NATS program card. 

Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS) initialization and all IVIS (NATS) ignition key ID registration  , refer to CONSULT-III Operation Manual, IVIS/NVIS.