1998 NISSAN PATROL Control unit

System Description
FUNCTION
Multi-remote control system has the following function.
+Door lock (and set super lock)
+Door unlock (and release super lock)
+Hazard reminder
LOCK OPERATION
To lock door by multi-remote controller, the following two signals must be received.
+Key switch OFF (when ignition key is not in ignition key cylinder.)
+All door switches CLOSED
When the LOCK signal is input to multi-remote control unit (the antenna of the system is combined with multi-
remote control unit), ground is supplied
+through multi-remote control unit terminalj
10
+to super lock control unit terminalj2.
Then super lock control unit operates to lock doors and set super lock.
UNLOCK OPERATION
To unlock door by multi-remote controller, the following signal must be received.
+Key switch OFF (when ignition key is not in ignition key cylinder)
When the UNLOCK signal is input to multi-remote control unit (the antenna of the system is combined with
multi-remote control unit), ground is supplied
+through multi-remote control unit terminalj
11
+to super lock control unit terminalj3.
Then super lock control unit operates to unlock doors and release super lock.
HAZARD REMINDER
When the doors are locked or unlocked by multi-remote controller, ground is supplied
+to terminalj
1of multi-remote control relay-1 and 2
+through multi-remote control unit terminalj
12.
Then the relays are energized and hazard warning lamp ¯ashes as follows
+Lock operation: Flash once
+Unlock operation: Flash twice
MULTI-REMOTE CONTROLLER ID CODE ENTRY
A maximum of four remote controllers can be entered. Any attempt to enter a remote controller will erase all
ID codes previously entered. Therefore, be sure to receive all remote controllers from the vehicle owner when
any ID code entry is performed.
To enter ID code entry, the following signals must be input to the multi-remote control unit.
+Driver side LOCKED signal (from driver side door unlock sensor)
+Door switch CLOSED signal
+Key switch signal (INSERTED/WITHDRAWN)
+Accessory power supply
+Signal from remote controller
For detailed procedure, refer to ``ID Code Entry Procedure'' in EL-239.
MULTI-REMOTE CONTROL SYSTEM
EL-234

Trouble Diagnoses
SYMPTOM CHART
Symptom Possible cause Diagnoses/service order
No doors can be
locked or unlocked
by remote control
operation.Hazard reminder
also does not oper-
ate either.1. Remote controller battery
2. Key switch (insert)
3. Door switch
4. Power supply circuit for multi-
remote control unit
5. Ground circuit for multi-remote
control unit
6. Remote controller1. Check remote controller battery. Refer to EL-238.
2. Check key switch (insert) signal at terminalj
7of
multi-remote control unit.
3. Check door switch signal at terminalsj
1and
j
2of multi-remote control unit.
4. Make sure battery voltage is present at
terminalj
3of multi-remote control unit.
5. Check continuity between terminalj
5of multi-re-
mote control unit and ground.
6. Replace remote controller. Refer to EL-239.
Hazard reminder
operates properly.1. Super lock system
2. Lock/unlock signal to super
lock control unit1. Check that power door lock operates properly. If
NG, check super lock, EL-211.
2. Check lock/unlock signal to super lock control unit
at terminalsj
10andj11of multi-remote control unit.
(See NOTE.)
Hazard reminder does not operate properly. 1. 10A fuse
2. Multi-remote control relay-1
and 2
3. Hazard reminder circuit1. Check 10A fuse (No.
48, located in the fuse and
fusible link box).
2. Check multi-remote control relay-1 and 2.
3. Check harness for open or short between relays
and multi-remote control unit terminalj
12.
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. Accessory power supply circuit
for multi-remote control unit
6. Remote controller1. Check remote controller battery. Refer to EL-238.
2. Check key switch (insert) signal at terminalj
7of
multi-remote control unit.
3. Check door switch signal at terminalsj
1andj2
of multi-remote control unit.
4. Check driver's door unlock sensor signal at termi-
nalj
6of multi-remote control unit.
5. Make sure battery voltage is present at terminal
j
8of multi-remote control unit while ignition
switch is in ACC position.
6. Replace remote controller. Refer to EL-239.
Refer to ``MULTI-REMOTE CONTROL UNIT INSPECTION TABLE'' on next page to check the control unit
signals.
NOTE:
+The unlock operation of multi-remote control system does not activate with key inserted in the ignition key
cylinder.
+The lock operation of multi-remote controller does not activate with the key inserted ignition key cylinder
or if one of the door is opened.
MULTI-REMOTE CONTROL SYSTEM
EL-237

MULTI-REMOTE CONTROL UNIT INSPECTION TABLE
Terminal
No.Connections ConditionVoltage (V)
(approximate
values)
1 Driver side door switch Driver side doorOpened 0
Closed 12
2 Door switch (all doors)One of doors is opened 0
All doors are closed 12
3 Power source (BAT) Ð 12
5 Ground Ð Ð
6 Driver side door unlock sensor Driver side doorLocked 5
Unlocked 0
7 Key switch (insert)Key is in ignition key cylinder 12
Key is not in ignition key cylinder 0
8 Accessory power supply Ignition switchOFF 0
ACC or ON 12
10Lock signal (to super lock control
unit)Remote controller LOCK button is pushed
(All doors are closed and key is not in ignition key cylinder.)0
Other than above condition 5
11Unlock signal (to super lock control
unit)Remote controller UNLOCK button is pushed
(Key is not in ignition key cylinder.)0
Other than above condition 5
12 Multi-remote control relay-1, 2Remote controller LOCK/UNLOCK button is pushed
(All doors are closed and key is not in ignition key cylinder.)0
Other than above condition 12
REMOTE CONTROLLER BATTERY CHECK
Remove battery and measure voltage across battery positive and
negative terminals,Åand@.
Measuring terminal
Standard value
Å@
Battery positive terminal
ÅBattery negative terminal
@2.5 - 3.0V
Note:
Remote controller does not function if battery is not set cor-
rectly.
SEL439V
SEL672U
MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses (Cont'd)
EL-238

ID Code Entry Procedure
Note:
A maximum of four remote controllers can be entered. Any attempt to enter a remote controller will
erase all ID codes previously entered. Therefore, be sure to receive all remote controllers from the
vehicle owner when any ID code entry is performed.
Enter the identity (ID) code manually when:
+remote controller or control unit is replaced.
+an additional remote controller is activated.
To enter the ID code, follow the procedures below.
PROCEDURE
Close all doors and lock driver side door.
Insert and remove the key from the ignition more than six times within 10 seconds.
Turn ignition key switch to ``ACC'' position. (The hazard warning lamps will then
¯ash twice.
Push any button on the new remote controller once. (The hazard warning lamps will
then ¯ash twice.)
At this time, the new ID code is entered and all previous ID memory is com-
pletely erased.
b
Do you want to enter any additional remote controller ID codes?
A maximum four ID codes may be entered. Any attempt to enter more will be
ignored.
No Yes
ADDITIONAL ID CODE ENTRY
Release the door lock, then lock again
with driver side knob lock switch.
Open driver side door or turn the ignition key switch to ``OFF'' position.
END.
After entering the identity (ID) code, check the operation of multi-remote con-
trol system.
NOTE:
+If you need to activate more than two additional new remote controllers, repeat the procedure
``Additional ID code entry'' for each new remote controller.
+If the same ID code that exists in the memory is input, the entry will be ignored.
+Entry of maximum four ID codes is allowed and any attempt to enter more will be ignored.
+Any ID codes cannot be entered after termination of the ``setting mode''.
.
.
.
.
.
.
.
MULTI-REMOTE CONTROL SYSTEM
EL-239

System Description
NATS has the following immobiliser functions:
+Since only NATS ignition keys, whose ID nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, operation of a stolen vehicle without a NATS registered key 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.
+Both of the originally supplied ignition key IDs have been NATS registered.
If requested by the vehicle owner, a maximum of four key IDs can be registered into the NATS compo-
nents.
+The NATS security indicator (NATS security ind.) 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 malfunction indicator lamp (MIL) blinks.
+NATS trouble diagnoses, system initialisation and additional registration of other NATS ignition key IDs
must be carried out using CONSULT hardware and CONSULT NATS software.
When NATS initialisation has been completed, the ID of the inserted ignition key is automatically NATS
registered. Then, if necessary, additional registration of other NATS ignition key IDs can be carried out.
Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to CONSULT
operation manual, NATS.
+When servicing a malfunction of the NATS (indicated by ¯ashing of Malfunction Indicator Lamp)
or registering another NATS ignition key ID no., it may be necessary to re-register original key
identi®cation. Therefore, be sure to receive all keys from vehicle owner.
System Composition
The immobiliser function of the NATS consists of the following:
+NATS ignition key
+NATS immobiliser control unit (NATS IMMU) located in the ignition key cylinder
+Engine control module (ECM)
+NATS security indicator
+Malfunction indicator lamp (MIL)
SEL402V
NATS (Nissan Anti-Theft System)/LHD MODELS
EL-240

System Description
NATS has the following immobiliser functions:
+Since only NATS ignition keys, whose ID nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, operation of a stolen vehicle without a NATS registered key 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.
+Both of the originally supplied ignition key IDs have been NATS registered.
If requested by the vehicle owner, a maximum of four key IDs can be registered into the NATS compo-
nents.
+The NATS security indicator (NATS security ind.) 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 malfunction indicator lamp (MIL) blinks.
+NATS trouble diagnoses, system initialisation and additional registration of other NATS ignition key IDs
must be carried out using CONSULT hardware and CONSULT NATS software.
When NATS initialisation has been completed, the ID of the inserted ignition key is automatically NATS
registered. Then, if necessary, additional registration of other NATS ignition key IDs can be carried out.
Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to CONSULT
operation manual, NATS.
+When servicing a malfunction of the NATS (indicated by ¯ashing of Malfunction Indicator Lamp)
or registering another NATS ignition key ID no., it may be necessary to re-register original key
identi®cation. Therefore, be sure to receive all keys from vehicle owner.
System Composition
The immobiliser function of the NATS consists of the following:
+NATS ignition key
+NATS antenna amp. located in the ignition key cylinder
+NATS immobiliser control unit (NATS IMMU)
+Engine control module (ECM)
+NATS security indicator
+Malfunction indicator lamp (MIL)
SEL304U
NATS (Nissan Anti-Theft System)/RHD MODELS
EL-255