2003 NISSAN X-TRAIL immobilizer

PRECAUTIONS
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PRECAUTIONSPFP:00001
DescriptionEAS000FN
Observe the following precautions to ensure safe and proper servicing. These precautions are not
described in each individual section.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EAS000P8
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for NATS (NISSAN ANTI-THEFT SYSTEM)EAS000FP
NATS will immobilize the engine if someone tries to start it without the registered key of NATS.
Both of the originally supplied ignition key IDs have been NATS registered.
The security indicator is located on the instrument panel. The indicator blinks when the immobilizer system is
functioning.
Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.

When NATS detects trouble, the security indicator lamp lights up while ignition switch is in "ON" position.
This lighting up indicates that the anti-theft is not functioning, so prompt service is required.

When servicing NATS (trouble diagnoses, system initialization and additional registration of other NATS
ignition key IDs), CONSULT-II hardware and CONSULT-II NATS software is necessary.
Regarding the procedures of NATS initialization and NATS ignition key ID registration, refer to CONSULT-
II operation manual, NATS.
Therefore, CONSULT-II NATS software (program card and operation manual) must be kept strictly con-
fidential to maintain the integrity of the anti-theft function.

When servicing NATS (trouble diagnoses, system initialization and additional registration of other NATS
ignition key IDs), it may be necessary to re-register original key identification. Therefore, be sure to
receive all keys from vehicle owner. A maximum of four or five key IDs can be registered into NATS.

When failing to start the engine first time using the key of NATS, start as follows.
1. Leave the ignition key in "ON" position for approximately 5 seconds.
2. Turn ignition key to "OFF" or "LOCK" position and wait approximately 5 seconds.
3. Repeat step 1 and 2 again.
4. Restart the engine while keeping the key separate from any others on key-chain.

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.
SIIA1246E

AUDIO
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NATS AUDIO LINK
Description
The link with the NATS IMMU implies that the audio unit can basically only be operated if connected to the
matching NATS IMMU to which the audio unit was initially fitted on the production line.
Since radio operation is impossible after the link with the NATS is disrupted theft of the audio unit is basically
useless since special equipment is required to reset the audio unit.
Initialization process for audio units that are linked to the NATS IMMU
New audio units will be delivered to the factories in the “NEW” state, i.e. ready to be linked with the vehicle's
NATS. When the audio unit in “NEW” state is first switched on at the factory, it will start up communication with
the vehicle's immobilizer control unit (IMMU) and send a code (the “audio unit Code”) to the IMMU. The IMMU
will then store this code, which is unique to each audio unit, in its (permanent) memory.
Upon receipt of the code by the IMMU, the NATS will confirm correct receipt of the audio unit code to the audio
unit. Hereafter, the audio unit will operate as normal.
During the initialization process, “NEW” is displayed on the audio unit display. Normally though, communica-
tion between audio unit and IMMU takes such a short time (300 ms) that the audio unit seems to switch on
directly without showing “NEW” on its display.
Normal operation
Each time the audio unit is switched on afterwards, the audio unit code will be verified between the audio unit
and the NATS before the audio unit becomes operational. During the code verification process, “WAIT” is
shown on the audio unit display. Again, the communication takes such a short time (300 ms) that the audio
unit seems to switch on directly without showing “WAIT” on its display.
When the radio is locked
In case of a audio unit being linked with the vehicle's NATS (immobilizer system), disconnection of the link
between the audio unit and the IMMU will cause the audio unit to switch into the lock (“SECURE”) mode in
which the audio unit is fully inoperative. Hence, repair of the audio unit is basically impossible, unless the
audio unit is reset to the “NEW” state for which special decoding equipment is required.
Clarion has provided their authorized service representatives with so called “decoder boxes” which can bring
the audio unit back to the “NEW” state, enabling the audio unit to be switched on after which repair can be car-
ried out. Subsequently, when the repaired audio unit is delivered to the final user again, it will be in the “NEW”
state to enable re-linking the audio unit to the vehicle's immobilizer system. As a result of the above, repair of
the audio unit can only be done by an authorized Clarion representative (when the owner of the vehicle
requests repair and can show personal identification).

AV-8
AUDIO

NATS AUDIO LINK
Description
The link with the NATS IMMU implies that the audio unit can basically only be operated if connected to the
matching NATS IMMU to which the audio unit was initially fitted on the production line.
Since radio operation is impossible after the link with the NATS is disrupted theft of the audio unit is basically
useless since special equipment is required to reset the audio unit.
Initialization process for audio units that are linked to the NATS IMMU
New audio units will be delivered to the factories in the “NEW” state, i.e. ready to be linked with the vehicle's
NATS. When the audio unit in “NEW” state is first switched on at the factory, it will start up communication with
the vehicle's immobilizer control unit (IMMU) and send a code (the “audio unit Code”) to the IMMU. The IMMU
will then store this code, which is unique to each audio unit, in its (permanent) memory.
Upon receipt of the code by the IMMU, the NATS will confirm correct receipt of the audio unit code to the audio
unit. Hereafter, the audio unit will operate as normal.
During the initialization process, “NEW” is displayed on the audio unit display. Normally though, communica-
tion between audio unit and IMMU takes such a short time (300 ms) that the audio unit seems to switch on
directly without showing “NEW” on its display.
Normal operation
Each time the audio unit is switched on afterwards, the audio unit code will be verified between the audio unit
and the NATS before the audio unit becomes operational. During the code verification process, “WAIT” is
shown on the audio unit display. Again, the communication takes such a short time (300 ms) that the audio
unit seems to switch on directly without showing “WAIT” on its display.
When the radio is locked
In case of a audio unit being linked with the vehicle's NATS (immobilizer system), disconnection of the link
between the audio unit and the IMMU will cause the audio unit to switch into the lock (“SECURE”) mode in
which the audio unit is fully inoperative. Hence, repair of the audio unit is basically impossible, unless the
audio unit is reset to the “NEW” state for which special decoding equipment is required.
Clarion has provided their authorized service representatives with so called “decoder boxes” which can bring
the audio unit back to the “NEW” state, enabling the audio unit to be switched on after which repair can be car-
ried out. Subsequently, when the repaired audio unit is delivered to the final user again, it will be in the “NEW”
state to enable re-linking the audio unit to the vehicle's immobilizer system. As a result of the above, repair of
the audio unit can only be done by an authorized Clarion representative (when the owner of the vehicle
requests repair and can show personal identification).

AUDIO
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Terminals and Reference Value for Audio Unit With Casette Deck EKS00EHS
Terminal
(Wire color)
ItemSignal
input/
outputCondition
Reference valueExample of symp-
tom
(+) (–)Igni-
tion
switchOperation
2
(L)1
(B/W)Audio sound
signal front
LHOutput ONReceive audio
signalNo sound from
front door speaker
and tweeter LH.
4
(BR) 3
(B/R)Audio sound
signal front
RH Output ONReceive audio
signalNo sound from
front door speaker
and tweeter RH.
5
(Y/R) GroundAntenna
signalOutput ACC – More than approx.10VReceiving status
of radio broadcast
becomes bad.
6
(Y/G)GroundBattery
power Input – – Battery voltageSystem does not
work properly.
8
(R/L)GroundLighting
switch signalInput ONLighting switch
ON (1st position)Battery voltageAudio unit illumi-
nation does not
function when
lighting switch is
ON (position 1). Lighting switch
OFFApprox.0V
10
(GY/L)Ground ACC power Input ACC – Battery voltageSystem does not
work properly.
14
(LG)13
(B/Y)Audio sound
signal rear
LH Output ONReceive audio
signalNo sound from
rear speaker LH.
16
(OR)15
(B/P)Audio sound
signal rear
RH Output ONReceive audio
signalNo sound from
rear speaker RH.
22
(L/W)GroundVehicle
speed sig-
nal (2-pulse)Input ONWhen vehicle
speed is
approx.40km/h
(25MPH)Speed sensitive
volume system
does not work
properly.
24
(PU)– Immobilizer – – – – –
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AUDIO
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Terminals and Reference Value for Audio Unit Without Casette Deck EKS00EHT
Terminal
(Wire color)
ItemSignal
input/
outputCondition
Reference valueExample of symp-
tom
(+) (–)Ignition
switchOperation
1
(R/L)GroundLighting
switch signalInput ONLighting switch
ON (1st position)Approx.12VAudio unit illumi-
nation does not
function when
lighting switch is
ON (position 1). Lighting switch
OFFApprox.0V
3
(GY/L)Ground ACC power Input ACC – Battery voltageSystem does not
work properly.
5
(PU)– immobilizer – – – – –
6
(Y/R)GroundAntenna
signalOutput ON – More than approx. 10VReceiving status
of radio broadcast
becomes bad.
9
(Y/G)Ground Battery power Input OFF – Battery voltage System does not
work properly.
11
(SB)
*1
(L)*2
10
(GY)*1
(B/W)*2
Audio sound
signal front
LH Output ONReceive audio
signalNo sound from
front door speaker
or tweeter LH.
12
(LG)13
(B/Y)Audio sound
signal rear
LH Output ONReceive audio
signalNo sound from
rear door speaker
LH.
15
(SB)
*3
(BR)*4
14
(GY)*3
(B/R)*4
Audio sound
signal front
RHOutput ONReceive audio
signalNo sound from
front door speaker
or tweeter RH.
16
(OR)7
(B/P)Audio sound
signal rear
RHOutput ONReceive audio
signalNo sound from
rear speaker RH.
20
*5
(L/B)22
*5
(B)Remote con-
trol AInput ONPress SOURCE
switchApprox.0V
Steering wheel
audio controls do
not function. Press SEEK
UPswitchApprox.1.7V
Press VOLME UP
switchApprox.3.3V
Except for above Approx.5V
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