Page 1489 of 2267

A
CHECK HARNESS CONNECTOR
CONNECTION.
Check the following harness connector
connection.
E125/M70
M85
Does the engine start?
No
Ye s
System is OK.
(The malfunction is
caused by improper con-
nector connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle unit
terminal
3and ground.
Continuity should exist.
Ye s
No
Repair harness.
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU ter-
minal
2and dongle unit terminal
5(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU ter-
minal
2and ground. (Short circuit
check)
Continuity should not exist.
Ye s
No
Repair harness.
Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialisation with CONSULT-
II.
For the initialisation procedure, refer
to“CONSULT-II operation manual
NATS”.
SEL417W
Dongle unit connector
SEL418W
IMMU connectorDongle unit
connector
Short circuit check
SEL419WShort circuit check IMMU connector
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-357
Page 1490 of 2267

DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
“ID DISCORD, IMM-ECM”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“ID DISCORD, IMM-
ECM*”displayed on CON-
SULT-II screen.*“ID DISCORD, IMM-ECM”:
Registered ID of IMMU is in
discord with that of ECM.
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is not com-
pleted or fails, CONSULT-II
shows
message on the
screen.
Ye s
NoECM is malfunctioning.
1. Replace ECM.
Ref. part No. B
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II opera-
tion manual NATS”.
Start engine. (END)
(System initialisation was not com-
pleted. Ref. part No. F)
C2SDD01
INITIALIZATION
FA I L
THEN IGN KEY SW ‘OFF’ AND
‘ON’, AFTER CONFIRMING
SELF-DIAG AND PASSWORD,
PERFORM C/U INITIALIZATION
AGAIN.
IMMU INITIALIZATION
YEL479B
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-358
Page 1491 of 2267
![NISSAN PRIMERA 1999 Electronic Repair Manual DIAGNOSTIC PROCEDURE 6
—With security indicator on dashboard—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace fuse.
NATS IN NISSAN PRIMERA 1999 Electronic Repair Manual DIAGNOSTIC PROCEDURE 6
—With security indicator on dashboard—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace fuse.
NATS IN](/manual-img/5/57377/w960_57377-1490.png)
DIAGNOSTIC PROCEDURE 6
—With security indicator on dashboard—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace fuse.
NATS INITIALISATION
1) Install the 10A fuse.
2) Perform initialisation with
CONSULT-II.
For the operation of
initialisation, refer to“CON-
SULT-II operation manual
NATS”.
Turn ignition switch“OFF”.
Start engine and turn ignition switch
“OFF”.
Check the security ind. lighting.
NG
OK
INSPECTION END
Check voltage between security indica-
tor lamp connector terminal
2and
ground.
Voltage: Battery voltage
OK
NG
Check harness for open
or short between fuse
and security indicator
lamp.
CHECK INDICATOR LAMP.
OK
NG
Replace indicator lamp.
CHECK NATS IMMU FUNCTION.
1. Connect NATS IMMU connector.
2. Disconnect security indicator lamp
connector.
3. Check continuity between NATS
IMMU terminal
6and ground.
Continuity should exist intermit-
tently.
OK
NG
NATS IMMU is malfunc-
tioning. Replace IMMU.
Perform initialisa-
tion with CON-
SULT-II.
For the operation
of initialisation,
refer to“CON-
SULT-II operation
manual NATS”.
Check harness for open or short
between security indicator and NATS
IMMU.
YEL482B
Security indicator
lamp connector
YEL483B
IMMU connector
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-359
Page 1492 of 2267
![NISSAN PRIMERA 1999 Electronic Repair Manual DIAGNOSTIC PROCEDURE 6
—With security indicator built-in combination
meter—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace NISSAN PRIMERA 1999 Electronic Repair Manual DIAGNOSTIC PROCEDURE 6
—With security indicator built-in combination
meter—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace](/manual-img/5/57377/w960_57377-1491.png)
DIAGNOSTIC PROCEDURE 6
—With security indicator built-in combination
meter—
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse [No.16 , located in the
fuse block (J/B)].
OK
NG
Replace fuse.
NATS INITIALISATION
1) Install the 10A fuse.
2) Perform initialisation with
CONSULT-II.
For the operation of
initialisation, refer to“CON-
SULT-II operation manual
NATS”.
Turn ignition switch“OFF”.
Start engine and turn ignition switch
“OFF”.
Check the security ind. lighting.
NG
OK
INSPECTION END
Check voltage between combination
meter connector terminal
2and
ground.
Voltage: Battery voltage
OK
NG
Check harness for open
or short between fuse
and combination meter.
CHECK INDICATOR LAMP.
OK
NG
Replace combination
meter.
CHECK NATS IMMU FUNCTION.
1. Connect NATS IMMU connector.
2. Disconnect combination meter con-
nector.
3. Check continuity between NATS
IMMU terminal
6and ground.
Continuity should exist intermit-
tently.
OK
NG
NATS IMMU is malfunc-
tioning. Replace IMMU.
Perform initialisa-
tion with CON-
SULT-II.
For the operation
of initialisation,
refer to“CON-
SULT-II operation
manual NATS”.
Check harness for open or short
between combination meter and NATS
IMMU.
YEL037D
YEL483B
IMMU connector
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-360
Page 1493 of 2267

DIAGNOSTIC PROCEDURE 7
Self-diagnostic results:
“LOCK MODE”displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS“LOCK MODE”is dis-
played on CONSULT-II 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
Ye s
System is OK.
(Now the system is
escaped from“LOCK
MODE”.)
CHECK NATS IMMU INSTALLATION.
Refer to“How to Replace NATS IMMU”
in EL-363.
OK
NG
Reinstall NATS IMMU
correctly.
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is incompleted
or failed, CONSULT-II shows
message on the screen.
No
Ye s
System is OK.
Go to DIAGNOSTIC PROCEDURE 4,
EL-356 to check“CHAIN OF IMMU-
KEY”.
SELF DIAGNOSIS
TIME DTC RESULTS
LOCK MODE0
YEL484B
INITIALIZATION
FA I L
THEN IGN KEY SW ‘OFF’ AND
‘ON’, AFTER CONFIRMING
SELF-DIAG AND PASSWORD,
PERFORM C/U INITIALIZATION
AGAIN.
IMMU INITIALIZATION
YEL479B
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-361
Page 1494 of 2267

DIAGNOSTIC PROCEDURE 8
Perform initialization with CONSULT-II
Check the following harness connector
connection.
E125/M70
M85
Then initialize NATS. For the operation
of initialization, refer to“CONSULT-II
operation manual NATS”.
Does the security indicator blink just
after the initialization?
No
Ye s
System is OK.
(The malfunction is
caused by improper con-
nector connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle unit
terminal
3and ground.
Continuity should exist.
Ye s
No
Repair harness.
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU ter-
minal
2and dongle unit terminal
5(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU ter-
minal
2and ground. (Short circuit
check)
Continuity should not exist.
Ye s
No
Repair harness.
Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialisation with CONSULT-
II.
For the initialisation procedure, refer
to“CONSULT-II operation manual
NATS”.
SEL417W
Dongle unit connector
SEL418W
IMMU connectorDongle unit
connector
Short circuit check
SEL419WShort circuit check IMMU connector
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-362
Page 1495 of 2267
How to Replace NATS IMMU
NOTE:
If NATS IMMU is not installed correctly, NATS system will
not operate properly and SELF-DIAG RESULTS on CON-
SULT-II screen will show“LOCK MODE”or“CHAIN OF
IMMU-KEY”.
SEL096WA
NVIS (NATS) IMMU
NATS (Nissan Anti-Theft System)
EL-363
Page 1496 of 2267
NOTE
NATS (Nissan Anti-Theft System)
EL-364