Page 3145 of 3833

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-93
C
D
E
F
G
H
J
K
L
MA
B
BL
6.CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT
1. Turn ignition ON.
2. Check voltage between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) or IMMU terminal 1
and ground.
OK or NG
OK >> GO TO 7
NG >>
●Communication line is short-circuited with battery
voltage line or ignition switch ON line.
●Repair harness or connectors.
●Ref. part No. C4
7.CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) or IMMU terminal 1
and ground.
OK or NG
OK >> GO TO 8
NG >>
●Communication line is short-circuited with ground
line.
●Repair harness or connectors.
●Ref. part No. C4
8.SIGNAL FROM ECM TO IMMU CHECK
1. Check the signal between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) and ground with
CONSULT-II or oscilloscope when ignition switch is turned “ON”.
2. Make sure signals which are shown in the figure below can be
detected during 750 msec. just after ignition switch is turned
“ON”.
OK or NG
OK >>●IMMU is malfunctioning.
●Replace IMMU. Ref. part No. A
●Perform initialization with CONSULT-II.
●For the operation of initialization, refer to “CONSULT-
II Operation Manual NATS”.
NG >>
●ECM is malfunctioning.
●Replace ECM. Ref. part No. B
●Perform initialization with CONSULT-II.
●For the operation of initialization, refer to “CONSULT-II Operation Manual NATS”. Voltage: Approx. 0V
SIIA1239E
Continuity should exist.
SIIA1240E
SEL730W
Page 3146 of 3833

BL-94
NATS (NISSAN ANTI-THEFT SYSTEM)
Diagnostic Procedure 3
EIS001T9
Self-diagnostic results:
“DIFFERENCE OF KEY” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “DIFFERENCE OF KEY”
displayed on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
Yes >> GO TO 2
No >> GO TO BL-89, "
SYMPTOM MATRIX CHART 1" .
2. PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all NATS ignition key IDs.
For initialization and registration of NATS ignition key IDs, refer to “CONSULT-II operation manual NATS”.
NOTE:
If the initialization is not completed or fails, CONSULT-II shows
above message on the screen.
Can the system be initialized and can the engine be started with re-
registered NATS ignition key?
Ye s > >●Ignition key ID was unregistered. Ref. part No. D
No >>
●IMMU is malfunctioning.
●Replace IMMU. Ref. part No. A
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II operation man-
ual NATS”.
SEL367X
SEL297W
Page 3147 of 3833

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-95
C
D
E
F
G
H
J
K
L
MA
B
BL
Diagnostic Procedure 4EIS001TA
Self-diagnostic results:
“CHAIN OF IMMU-KEY” displayed on CONSULT-II screen
1.CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF IMMU-KEY”
displayed on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
Ye s > > G O T O 2
No >> GO TO BL-89, "
SYMPTOM MATRIX CHART 1" .
2.CHECK NATS IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
Ye s > >●Ignition key ID chip is malfunctioning.
●Replace the ignition key.
●Ref. part No. E
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II Operation Manual NATS”.
No >>
●Models without dongle unit
–IMMU is malfunctioning.
–Replace IMMU. Ref. part No. A
–For initialization, refer to “CONSULT-II Operation Manual NATS”.
–Perform initialization with CONSULT-II.
●Models with dongle unit
–GO TO 3
3.CHECK HARNESS CONNECTOR CONNECTION
Check harness connector connection between E109 and M80.
Does the engine start?
Yes >> System is OK. (The malfunction is caused by improper connector connection.)
No >> GO TO 4
4.CHECK GROUND CIRCUIT FOR DONGLE UNIT
Check continuity between dongle unit terminal 1 and ground.
OK or NG
OK >> GO TO 5
NG >> Repair harness.
SEL292W
Continuity should exist.
SIIA1241E
Page 3148 of 3833

BL-96
NATS (NISSAN ANTI-THEFT SYSTEM)
5. CHECK INTERFACE CIRCUIT
1. Check continuity between IMMU terminal 2and dongle unit ter-
minal 7.
2. Check continuity between IMMU terminal 2 and ground.
OK or NG
OK >> Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialization with CONSULT-II. For the initial-
ization procedure, refer to “CONSULT-II operation manual NATS.
NG >> Repair harness.
Diagnostic Procedure 5EIS001TB
Self-diagnostic results:
“ID DISCORD, IMM-ECM” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “ID DISCORD, IMM-ECM” displayed on CONSULT-II screen.
NOTE:
“ID DISCORD IMMU-ECM”:
Registered ID of IMMU is in discord with that of ECM.
Is CONSULT-II screen displayed as above?
Yes >> GO TO 2
No >> GO TO BL-89, "
SYMPTOM MATRIX CHART 1" .
2. PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all NATS ignition key IDs.
For initialization, refer to “CONSULT-II operation manual NATS”.
NOTE:
If the initialization is not completed or fails, CONSULT-II shows
above message on the screen.
Can the system be initialized?
Ye s > >●Start engine. (END)
●(System initialization had not been completed. Ref.
part No. B )
No >>
●ECM is malfunctioning.
●Replace ECM. Ref. part No. B
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II operation manual NATS”. Continuity should exist.
Continuity should not exist.
SIIA1242E
SEL958W
SEL297W
Page 3149 of 3833

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-97
C
D
E
F
G
H
J
K
L
MA
B
BL
Diagnostic Procedure 6EIS001TC
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
1.CHECK FUSE
Check 10A fuse [No. 28, located in the fuse block (J/B)].
Is 10A fuse OK?
Ye s > > G O T O 2
No >> Replace fuse.
2.CHECK SECURITY INDICATOR LAMP
1. Install 10A fuse.
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS”.
3. Turn ignition switch OFF.
4. Start engine and turn ignition switch OFF.
5. Check the security indicator lamp lighting.
Security indicator lamp should be light up.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3
3.CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Disconnect security indicator lamp connector.
2. Check voltage between security indicator lamp connector terminal 2 and ground.
OK or NG
OK >> GO TO 4
NG >> Check harness for open or short between fuse and
security indicator lamp.
4.CHECK SECURITY INDICATOR LAMP
Check security Indicator Lamp.
Is security indicator lamp OK?
Ye s > > G O T O 5
No >> Replace security indicator lamp.Battery voltage should exist.
SIIA1243E
Page 3150 of 3833

BL-98
NATS (NISSAN ANTI-THEFT SYSTEM)
5. CHECK IMMU FUNCTION
1. Connect IMMU connector.
2. Disconnect security indicator lamp connector.
3. Check continuity between IMMU terminal 5 and ground.
OK or NG
OK >> Check harness for open or short between security indi-
cator lamp and IMMU.
NG >>
●IMMU is malfunctioning.
●Replace IMMU. Ref. part No. A
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II operation man-
ual NATS”.
Diagnostic Procedure 7EIS001TD
Self-diagnostic results:
“LOCK MODE” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “LOCK MODE” is displayed
on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
Yes >> GO TO 2
No >> GO TO BL-89, "
SYMPTOM MATRIX CHART 1" .
2. ESCAPE FROM LOCK MODE
1. Turn ignition switch OFF.
2. Turn ignition switch ON with registered key. (Do not start engine.) Wait 5 seconds.
3. Return the key to OFF position.
4. Repeat steps 2 and 3 twice (total of three cycles).
5. Start the engine.
Does engine start?
Ye s > >●System is OK.
●(Now system is escaped from “LOCK MODE”.)
No >> GO TO 3
3. CHECK IMMU ILLUSTRATION
Check IMMU installation. Refer to BL-100, "
How to Replace NATS IMMU" .
OK or NG
OK >> GO TO 4
NG >> Reinstall IMMU correctly.Continuity should exist intermittently.
SIIA1244E
SEL960W
Page 3151 of 3833

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-99
C
D
E
F
G
H
J
K
L
MA
B
BL
4.PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
NOTE:
If the initialization is not completed or fails, CONSULT-II shows the
above message on the screen.
Can the system be initialized?
Yes >> System is OK.
No >> GO TO 5
5.PERFORM INITIALIZATION WITH CONSULT-II AGAIN
1. Replace IMMU.
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
NOTE:
If the initialization is not completed or fails, CONSULT-II shows
the above message on the screen.
Can the system be initialized?
Yes >> System is OK. (IMMU is malfunctioning. Ref. part No. A
)
No >>
●ECM is malfunctioning.
Replace ECM. Ref. part No. B
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation man-
ual NATS”.
Diagnostic Procedure 8EIS001TE
1.CHECK HARNESS CONNECTOR CONNECTION
Perform initialization with CONSULT-II.
Check harness connector connection between E109 and M80.
Then initialize NATS. For the initialization operation, refer to “CONSULT-II operation NATS”.
Does the security indicator blink just after initialization?
Yes >> System is OK. (The malfunction is caused by improper connector connection.)
No >> GO TO 2
2.CHECK GROUND CIRCUIT FOR DONGLE UNIT
Check continuity between dongle unit terminal 1 and ground.
OK or NG
OK >> GO TO 3
NG >> Repair harness.
SEL297W
SEL297W
Continuity should exist.
SIIA1241E
Page 3152 of 3833
BL-100
NATS (NISSAN ANTI-THEFT SYSTEM)
3. CHECK INTERFACE CIRCUIT
1. Check continuity between IMMU terminal 2 and dongle unit ter-
minal 7.
2. Check continuity between IMMU terminal 2 and ground.
OK or NG
OK >> Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialization with CONSULT-II. For the initial-
ization procedure, refer to “CONSULT-II Operation Manual NATS”.
NG >> Repair harness.
How to Replace NATS IMMUEIS001RY
NOTE:
●If NATS IMMU is not installed correctly, NATS system will not operate properly and SELF-DIAG
RESULTS on CONSULT-II screen will show “LOCK MODE”.Continuity should exist.
Continuity should not exist.
SIIA1242E
SEL096WC