1998 NISSAN PICK-UP engine

DIAGNOSTIC PROCEDURE 8
Self-diagnostic results:
``LOCK MODE'' displayed on CONSULT screen
Confirm SELF-DIAGNOSTIC
RESULTS ``LOCK MODE'' is dis-
played on CONSULT screen.
1. Turn the ignition switch to OFF posi-
tion.
2. Turn the ignition key switch to ON
position with a registered key.
(Do not start engine.) Wait for 5 sec-
onds.
3. Return the key to the OFF position.
4. Repeat steps 2 and 3 twice (total of
three cycles).
5. Start the engine.
Can the engine start?
No
cYes
System is OK.
(Now the system is
escaped from ``LOCK
MODE''.)
CHECK NATS IMMU INSTALLATION.
Refer to ``How to Replace NATS IMMU''
in EL-197.
OK
cNG
Reinstall NATS IMMU cor-
rectly.
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(GASOLINE)''.
Can the system be initialized?
Note: If the initialisation is incompleted or
failed, CONSULT shows
mes-
sage on the screen.
No
cYes
System is OK.
Go to DIAGNOSTIC PROCEDURE 5,
EL-194 to check ``CHAIN OF IMMU-
KEY''.
SEL790U
SEL038V
.
.
.
.
NATS (Nissan Anti-Theft System)/Gasoline engine for LHD models
Trouble Diagnoses (Cont'd)
EL-196

DIAGNOSTIC PROCEDURE 9
Security indicator check
CHECK INDICATOR CIRCUIT.
1. Disconnect NATS IMMU connector.
2. Check voltage between NATS IMMU
terminal
V6and ground.
Battery voltage should exist.
OK
cNG
Check the following.
l7.5A fuse (No.6,
located in the fuse block)
lSecurity indicator
lHarness for open or
short between fuse and
security indicator
lHarness for open or
short between NATS
IMMU and security indi-
cator
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(GASOLINE)''.
How to Replace NATS IMMU
NOTE:
lIf NATS IMMU is not installed correctly, NATS system
will not operate properly and SELF-DIAG RESULTS on
CONSULT screen will show ``LOCK MODE'' or ``CHAIN
OF IMMU-KEY''.
SEL400VC
SEL498V
.
NATS (Nissan Anti-Theft System)/Gasoline engine for LHD models
Trouble Diagnoses (Cont'd)
EL-197

Component Parts and Harness Connector
Location
SEL650V
NATS (Nissan Anti-Theft System)/Diesel engine
EL-198

System Description
NATS has the following immobiliser functions:
lSince only NATS ignition keys, whose IDs. have been registered into the NATS immobiliser control unit
(NATS IMMU), allow the engine to run, operation of a stolen vehicle without a NATS registered key is
prevented by NATS.
lBoth 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.
lThe 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.
lIf NATS detects trouble, the NATS security indicator comes on while engine is running or ignition switch
is in ``ON'' position.
lWhen servicing NATS (trouble diagnoses, NATS initialisation and additional registration of other NATS
ignition key IDs), CONSULT hardware and CONSULT NATS software is necessary.
lThere are two types of NATS initialisation, one is ``SYSTEM INITIALISATION'' and another is ``IMMU
INITIALISATION''.
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 V2.0 (Diesel).
lWhen servicing a malfunction of the NATS (indicated by lighting of NATS security ind.) or reg-
istering 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.
System Composition
The immobiliser function of the NATS consists of the following:
lNATS ignition key
lNATS antenna amp. located in the ignition key cylinder
lNATS immobiliser control unit (NATS IMMU)
lCoded solenoid unit installed in the injection pump assembly (CSOLU)
lNATS security indicator (NATS security ind.)
SEL549U
NATS (Nissan Anti-Theft System)/Diesel engine
EL-199

Wiring Diagram Ð NATS Ð/LHD Models
HEL389A
NATS (Nissan Anti-Theft System)/Diesel engine
EL-200

Wiring Diagram Ð NATS Ð/RHD Models
HEL390A
NATS (Nissan Anti-Theft System)/Diesel engine
EL-201

CONSULT
CONSULT INSPECTION PROCEDURE
1. Turn off ignition switch.
2. Connect ``CONSULT'' to Data link connector for CONSULT.
3. Insert NATS program card into CONSULT.
b
: Program card
NATS-E940
4. Turn on ignition switch.
5. Touch ``START''.
6. Touch ``V.2.0 (DIESEL)''.
7. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT Operation
Manual, NATS V2.0 (Diesel).
NOTE:
Two types of initialisation (system initialisation and IMMU initiali-
sation) are available. For details, refer to ``INITIALISATION'' in
next page.
SEF056U
SEL327U
SEL662U
SEL663U
SEL718U
NATS (Nissan Anti-Theft System)/Diesel engine
EL-202

CONSULT DIAGNOSTIC TEST MODE FUNCTION
CONSULT diagnostic test mode Description
C/U INITIALISATION Two types of initialisation are available. For details, refer to ``INITIALISATION'' shown below.
SELF-FUNCTION CHECK IMMU checks its own NATS communication interface.
SELF-DIAGNOSTIC RESULTS Self-diagnostic results can be read and erased quickly.
INITIALISATION
Initialisation type Description
SYSTEM INITIALISATIONAll registered ignition key IDs in IMMU and CSOLU can be registered.
It takes around 16 minutes.
When the following component is replaced, this initialisation is required.
lIMMU
lCSOLU
IMMU INITIALISATIONAll registered ignition key IDs in IMMU can be initialised and new IDs can be registered.
When the following component is replaced or new NATS ignition key is registered, this ini-
tialisation is required.
lNATS ignition key
NOTE:
When any of initialisation is performed, all of ID codes previously registered will be erased. So all of NATS
ignition keys must be registered again.
If unregistered key is used to try to start the engine, the system may show ``KEY ID [DIFFERENCE]'' as a
self-diagnostic result on CONSULT screen.
HOW TO READ SELF-DIAGNOSTIC RESULTS
SEL664U
NATS (Nissan Anti-Theft System)/Diesel engine
CONSULT (Cont'd)
EL-203