NATS (NISSAN ANTI-THEFT SYSTEM)
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System DescriptionEIS001RR
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
Since only NATS ignition keys, whose ID Nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, a vehicle operation without registered key in NATS is prevented by NATS.
That is to say, NATS will immobilize the engine if someone tries to start it without the registered key of
NATS.
This version of NATS has dongle unit to improve its anti-theft performance (RHD models). Dongle unit has
its own ID which is registered into NATS IMMU. So if dongle unit is replaced, initialization must be carried
out.
When malfunction of dongle unit is detected:
The security indicator lamp illuminates for about 15 minutes after ignition switch is turned to ON.
–When dongle unit has a malfunction and the indicator lamp is illuminated, engine can not be started. How-
ever engine can be started only one time when security indicator lamp turns off in about 15 minutes after
ignition switch is turned to ON.
All of the originally supplied ignition key IDs have been registered in NATS.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the NATS compo-
nents.
The security indicator blinks when the ignition switch is in “OFF” or “ACC” position. Therefore, NATS
warns outsiders that the vehicle is equipped with the anti-theft system.
When NATS detects trouble, the security indicator lamp lights up as follows.
NATS trouble diagnoses, system initialization and additional registration of other NATS ignition key IDs
must be carried out using CONSULT-II hardware and CONSULT-II NATS software.
When NATS initialzation has been completed, the ID of the inserted ignition key is auto matically registerd
in NATS. Then, if necessary, additional registration of other NATS ignition key IDs can be carried out.
Regarding the procedures of NATS initialization and NATS ignition key ID registration, refer to CONSULT-
II operation manual, NATS.
When servicing a malfunction of the NATS (indicated by lighting up of Security Indicator Lamp) or
registering another NATS ignition key ID No., it may be necessary to re-register original key identi-
fication. Therefore, be sure to receive ALL KEYS from vehicle owner.
Condition IGN ON andWith dongle Without dongle
Security indicator Security indicator
NATS malfunction (except dongle unit) is
detected1. 6 times blinking
2. Staying ON after ignition switch is turned
ONStaying ON
Only malfunction of dongle unit is
detected.Staying ON for about 15 minutes after igni-
tion switch is turned ON—
Malfunction of NATS and engine related
parts are detected.1. 6 times blinking
2. Staying ON after ignition switch is turned
ONStaying ON
Only engine related part malfunction is
detected.——
Just after initialization of NATS 6 times blinking —
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NATS (NISSAN ANTI-THEFT SYSTEM)
System CompositionEIS001RS
The immobilizer function of the NATS consists of the following:
NATS ignition key
NATS immobilizer control unit (IMMU) located in the ignition key cylinder
Engine control module (ECM)
Dongle unit (RHD models)
Security indicator
ECM Re-communicating FunctionEIS008F1
Performing following procedure can automatically perform re-communication of ECM and NATS IMMU, but
only when the ECM has been replaced with a new one (*1).
*1: New one means a virgin ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)
NOTE:
When registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual, NATS.
If multiple keys are attached to the key holder, separate them before work.
Distinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Using a registered key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key (except for card plate key) that has been used before performing
ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
If engine can be started, procedure is completed.
If engine cannot be started, refer to CONSULT-II Operation Manual NATS and initialize control unit.
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