NISSAN X-TRAIL 2005 Service Repair Manual

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 initialization has been completed, the ID of the inserted ignition key is auto matically regis-
tered 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.
SIIA1246E

NATS (NISSAN ANTI-THEFT SYSTEM)
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Wiring Diagram — NATS —EIS008F2
LHD MODELS
TIWA0481E

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NATS (NISSAN ANTI-THEFT SYSTEM)

TIWB0025E

NATS (NISSAN ANTI-THEFT SYSTEM)
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RHD MODELS
TIWA0482E

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NATS (NISSAN ANTI-THEFT SYSTEM)

TIWB0026E

NATS (NISSAN ANTI-THEFT SYSTEM)
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CONSULT-IIEIS008F3
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Insert NATS program card into CONSULT-II.
3. Connect CONSULT-II to data link connector.
4. Turn ignition switch ON.
5. Touch “START”.
6. Torch “OTHER”.
7. Select “NATS V.5.0”.
If "NATS V5.0" is not indicated go to GI-35, "
CONSULT-II Data
Link Connector (DLC) Circuit" . Program card : NATS (AEN04A−1)
SIIA1249E
PBR455D
PIIA6816E
SEL027X

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NATS (NISSAN ANTI-THEFT SYSTEM)

8. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual,
NATS.
CONSULT-II DIAGNOSTIC TEST MODE FUNCTION
NOTE:

When any initialization is performed, all ID previously registered will be erased and all NATS igni-
tion keys must be registered again.

The engine cannot be started with an unregistered key. In this case, the system may show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.

When initialization is performed for RHD models, security indicator will flash six times to demonstrate rec-
ognition of the dongle unit ID.

In rare case, “CHAIN OF ECM-IMMU” might be stored as a self-diagnostic result during key registration
procedure, even if the system is not malfunctioning.
HOW TO READ SELF-DIAGNOSTIC RESULTS
SEL150X
CONSULT-II DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATIONWhen replacing any of the following components, C/U initialization and re-registration of all
NATS ignition keys are necessary.
[NATS ignition key/IMMU/ECM/Dongle unit]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
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NATS SELF-DIAGNOSTIC RESULTS ITEM CHART"
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NATS (NISSAN ANTI-THEFT SYSTEM)
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NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items
(NATS program card screen terms)P No. Code
(Self-diagnostic
result of
“ENGINE”Malfunction is detected when.....Reference
page
ECM INT CIRC-IMMUNATS MAL-
FUNCTION
P1613The malfunction of ECM internal circuit of IMMU commu-
nication line is detected.BL-121
CHAIN OF ECM-IMMUNATS MAL-
FUNCTION
P1612Communication impossible between ECM and IMMU
(In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.)BL-122
DIFFERENCE OF KEYNATS MAL-
FUNCTION
P1615IMMU can receive the key ID signal but the result of ID
verification between key ID and IMMU is NG.BL-125
CHAIN OF IMMU-KEYNATS MAL-
FUNCTION
P1614IMMU cannot receive the key ID signal.BL-126
ID DISCORD, IMM-ECMNATS MAL-
FUNCTION
P1611The result of ID verification between IMMU and ECM is
NG. System initialization is required.BL-127
LOCK MODENATS MAL-
FUNCTION
P1610When the starting operation is carried out five or more
times consecutively under the following conditions, NATS
will shift the mode to one which prevents the engine from
being started.

Unregistered ignition key is used.

IMMU or ECM's malfunctioning.BL-129
DON'T ERASE BEFORE CHECK-
ING ENG DIAG—All engine trouble codes except NATS trouble code has
been detected in ECM.BL-118

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NATS (NISSAN ANTI-THEFT SYSTEM)

Work FlowEIS008F4
SEL729WE