Q45 V8-4.5L (VK45DE) (2002)
Technical Service Bulletin # 02-071
Antitheft System - IVIS/Nats Key Registration Procedure
November 4, 2002
ENGINE WILL NOT START OR INTERMITTENT NO START ELECTRONIC KEY REGISTRATION PROCEDURE SYSTEM DESCRIPTION
2002 Q45 (F50)
Start of production
This bulletin covers a new version of the "Infiniti Vehicle Immobilizer System/Nissan Anti-Theft System" (IVIS/NATS). This system, referred to as
"NATS", is standard equipment on the 2002 Q45.
The New NATS "C/U Initialization and Electronic Key Registration" Procedure in this bulletin is unique for the 2002 Q45. Do not use this
procedure on any other NATS-equipped vehicles.
NATS uses advanced anti-theft functions which are "password protected". This helps prevent "unauthorized access" into the NATS "registration"
The NATS will not allow the engine to start without the use of a registered electronic ignition key. If a vehicle will not start and the Security lamp is
on solid, it may be because the ignition keys were not properly registered into the vehicle's NATS IMMU (Immobilizer control unit). In this case,
there will be a "DIFFERENCE OF KEY" code stored in the NATS IMMU.
If the NATS ignition key, vehicle's ECM or NATS IMMU" have been replaced, C/U Initialization and Electronic Key Registration MUST BE
PERFORMED OR THE VEHICLE WILL NOT START.
C/U Initialization and Electronic Key Registration is also necessary when: (1) "registering" keys, (2) as part of many NATS Service Manual
NATS Immobilizer Control Unit (IMMU)
The ECM and IMMU do not work together. The IMMU controls the information necessary to "tell" the ECM to start the vehicle.
THE FOLLOWING POINTS MUST BE FOLLOWED IF C/U INITIALIZATION AND ELECTRONIC KEY REGISTRATION ARE BEING
Before proceeding with Electronic Key Registration all existing ignition keys to the vehicle must be collected from the customer. All prior key IDs
will be erased once the process is started and the earlier keys will not start the vehicle. All ignition keys that are going to be used for the vehicle must
be present, available and registered during Key Registration or THEY WILL NOT START THE VEHICLE.
If all electronic keys are lost, refer to the "New Electronic Key Procedure".
To prevent transponder interference keep all NATS ignition keys and other transponders away from the key being registered during the Key
Registration process (see NOTES ABOUT TRANSPONDER INTERFERENCE, below). This ensures the proper ID code for each key registered is
stored into the NATS IMMU memory.
Do not "crank" the engine/operate the starter during the Key Registration Procedure.