immobilizer NISSAN TERRANO 2002 Service Repair Manual

System Description
Refer to Owner's Manual for audio system operating instructions.
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 ªNEWº state, i.e. ready to be linked with the vehicle's
NATS. When the audio unit in ªNEWº state is first switched on at the factory, it will start up communication
with the vehicle's immobiliser control unit (IMMU) and send a code (the ªaudio unit Codeº) 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 initialisation process, ªNEWº is displayed on the audio unit display. Normally though, communica-
tion between audio unit and IMMU takes such a short time that the audio unit seems to switch on directly
without showing ªNEWº 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, ªWAITº is
shown on the audio unit display. Again, the communication takes such a short time that the audio unit seems
to switch on directly without showing ªWAITº 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 (ªSECUREº) 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 ªNEWº state for which special decoding equipment is required.
Clarion has provided their authorized service representatives with so called ªdecoder boxesº which can bring
the audio unit back to the ªNEWº state, enabling the audio unit to be switched on after which repair can be
carried out. Subsequently, when the repaired audio unit is delivered to the final user again, it will be in the
ªNEWº state as to enable re-linking the audio unit to the vehicle's immobiliser system. As a result of the above,
repair of the audio unit can only be done by an authorized Clarion representative.
Service instruction
Item Radio linked with IMMU and/or SECU
Battery disconnection No additional action required
Radio needs repair Repair needs to be done by authorised representative of radio manufacturer since radio
cannot be operated unless it is reset to NEW state, using special decoding equipment
Replacement of radio by new part Radio is delivered in NEW state. If possible, the radio will automatically link up with the
immobiliser system. If this appears not possible, CATS code needs to be manually input
Transferring radio to another vehicle /
replacement of radio by an ªoldº partRadio needs to be reset to NEW state by authorised representative of radio manufac-
turer
Replacement of IMMU by new part Radio will request for CATS code input prior to establishing the link with the IMMU
Replacement of IMMU by old part If a radio code has already been stored in memory of the IMMU, the radio cannot be
linked to it. After switching on the radio, it will display ªSECUREº after 1 minute. Opera-
tion can only be established after resetting the ratio by an authorised representative of
radio manufacturer
CATS code input procedure
1. Radio displays ªCODE INº after the power is switched ON.
2. Enter CATS code (4-digits) by pressing the preset buttons (using 1 to 4).
Press the preset buttons for the necessary amount of times for the number of each digits.
e.g. CATS code is ª5432º
Press No. 1 preset button for 5 times
Press No. 2 preset button for 4 times
AUDIO
EL-111

Trouble Diagnoses
If doors can not be unlocked by remote controller operation then the following procedure is required.
A) Unlock the vehicle by a mechanical key in the drivers door key cylinder.
Note: this may cause the alarm to sound.
B) Put the key in ignition, turn to ON position for at least five seconds. Assuming the ignition key contains a
valid transponder then a signal will be generated by the immobilizer which will disarm the alarm and allow
key learn mode to be entered.
C) Turn ignition OFF and wait for ten seconds.
SYMPTOM CHART
Symptom Possible cause Diagnoses/service order
No doors can be locked or
unlocked by remote control opera-
tion.1. Remote controller battery
2. Power door lock system
3. Key switch (insert)
4. Door switch
5. Power supply circuit for time
control unit
6. Ground circuit for time control
unit
7. Remote controller1. Check remote controller battery. Refer to EL-178.
2. Check that power door lock operates properly. If
NG, check power door lock.
3. Check key switch (insert) signal at terminal
U22of
time control unit.
4. Check door switch signal at terminals
B01and
B07of time control unit (Fuse block).
5. Make sure battery voltage is present at terminal
U09of time control unit.
6. Check continuity between terminal
MM2of time con-
trol unit (Fuse block) and ground.
7. Replace remote controller. Refer to EL-179.
The new ID of remote controller
cannot be entered.1. Remote controller battery
2. Key switch (insert)
3. Door switch
4. Driver's door unlock sensor
5. Ignition ON power supply
circuit for time control unit
6. Remote controller1. Check remote controller battery. Refer to EL-178.
2. Check key switch (insert) signal at terminal
U22of
time control unit.
3. Check door switch signal at terminals
B01and
B07of time control unit (Fuse block).
4. Check driver's door unlock sensor signal at terminal
U35of time control unit.
5. Make sure battery voltage is present at terminal
U01of time control unit while ignition switch is in
ON position.
6. Replace remote controller. Refer to EL-179.
Refer to ªTIME CONTROL UNIT INSPECTION TABLEº on EL-178 to check the control unit signals.
NOTE:
IThe unlock operation of multi-remote control system does not activate with key inserted in the ignition key
cylinder.
IThe lock operation of multi-remote controller does not activate with the key inserted in the ignition key cyl-
inder or if one of the doors is opened.
MULTI-REMOTE CONTROL SYSTEM
EL-177

ID Code Entry Procedure
Enter the identity (ID) code manually when:
Iremote controller or TCU is replaced.
Ian additional remote controller is activated.
Activation of the registration mode:
The vehicle must have been unlocked by either the multi-remote controller or a transponder OK signal (TPOK) from the vehicle's
immobilizer.
Preparation: - Make sure all doors unlock.
- Make sure all multi-remote controllers to be registered are available.
- Make sure the batteries of all multi-remote controllers are in a good condition.
- Make sure all transmitting sources are out of the neighbourhood of the vehicle.
- Make sure the battery of the vehicle is in a good condition.F
Switch ignition-switch exactly six times from the ªLOCKº to the ªONº position within 10 seconds and return the ignition switch to
the ªLOCKº position (leaving the key in the ignition switch).F
After 2 seconds the registration mode is activated. The turn signal lamps will flash twice.
OKNG
Proceed with the registration mode.
NOTE
The registration mode is exited when:IThe ignition-switch is turned to the ªONº position.
Ia multi-remote controller ID code had registered after 4 ID codes have been registered (then, all
of the registered ID codes are erased).
INo multi-remote controller or ignition switch input is received within 120 seconds.
Registration mode
G
Press and hold the ªUNLOCKº button of the multi-remote controller.F
NEL569
Press the ªLOCKº button 3 times.
Release the ªUNLOCKº button.
(At this time, the original (previous) ID code(s) are erased.)EIf the multi-remote controller code
is registered correctly, the turn
signal lamp will flash once.
(If 4 ID codes have been
registered, the turn signal lamp
will flash 3 times.)ENG
Do you want to register another multi-remote controller? (max. 4)
(If 4 controllers have been registered, you should turn the ignition switch to the
ON position.)
NoYe s
FOK
Turn the ignition switch to the ON position.
EIf the multi-remote controller reg-
istration is performed correctly,
the turn signal lamp will flash
twice.
(If 4 ID codes have been
registered, the turn signal lamp
will not flash.)
Take the ignition key out of the ignition switch and confirm the functioning of all
multi-remote controllers by locking and unlocking the vehicle with each of the
multi-remote controllers.OK NGF
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MULTI-REMOTE CONTROL SYSTEM
EL-179