2005 NISSAN X-TRAIL Security

BL-110
NATS (NISSAN ANTI-THEFT SYSTEM)

System CompositionEIS001RS
The immobilizer function of the NATS consists of the following:

NATS ignition key

NATS immobilizer control unit (IMMU) located in the ignition key cylinder

Engine control module (ECM)

Dongle unit (RHD models)

Security indicator
ECM Re-communicating FunctionEIS008F1
Performing following procedure can automatically perform re-communication of ECM and NATS IMMU, but
only when the ECM has been replaced with a new one (*1).
*1: New one means a virgin ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)
NOTE:

When registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual, NATS.

If multiple keys are attached to the key holder, separate them before work.

Distinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Using a registered key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key (except for card plate key) that has been used before performing
ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
If engine can be started, procedure is completed.
If engine cannot be started, refer to CONSULT-II Operation Manual NATS and initialize control unit.
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BL-116
NATS (NISSAN ANTI-THEFT SYSTEM)

8. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual,
NATS.
CONSULT-II DIAGNOSTIC TEST MODE FUNCTION
NOTE:

When any initialization is performed, all ID previously registered will be erased and all NATS igni-
tion keys must be registered again.

The engine cannot be started with an unregistered key. In this case, the system may show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.

When initialization is performed for RHD models, security indicator will flash six times to demonstrate rec-
ognition of the dongle unit ID.

In rare case, “CHAIN OF ECM-IMMU” might be stored as a self-diagnostic result during key registration
procedure, even if the system is not malfunctioning.
HOW TO READ SELF-DIAGNOSTIC RESULTS
SEL150X
CONSULT-II DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATIONWhen replacing any of the following components, C/U initialization and re-registration of all
NATS ignition keys are necessary.
[NATS ignition key/IMMU/ECM/Dongle unit]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
BL-117, "
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART"
SEL151X

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-119
C
D
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F
G
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MA
B
BL

Trouble DiagnosesEIS008F5
SYMPTOM MATRIX CHART 1
Self-diagnosis related item
SYMPTOMDisplayed “SELF-DIAG
RESULTS” on CON-
SULT-II screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning part or
mode)REFERENCE PART NO.
OF ILLUSTRATION ON
SYSTEM DIAGRAM

Security indicator
lighting up*

Engine cannot be
startedECM INT CIRC-IMMUPROCEDURE 1
(BL-121
)ECM B
CHAIN OF ECM-IMMUPROCEDURE 2
(BL-122
)In rare case, “CHAIN OF
ECM-IMMU” might be
stored during key regis-
tration procedure, even if
the system is not mal-
functioning.—
Open circuit in battery
voltage line of IMMU cir-
cuitC1
Open circuit in ignition
line of IMMU circuitC2
Open circuit in ground
line of IMMU circuitC3
Open circuit in communi-
cation line between
IMMU and ECMC4
Short circuit between
IMMU and ECM commu-
nication line and battery
voltage lineC4
Short circuit between
IMMU and ECM commu-
nication line and ground
lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(BL-125
)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(BL-126
)Malfunction of key ID
chipE
IMMU A
Open circuit in ground
line of dongle unit circuitC6
Open or short circuit in
line between IMMU and
dongle unitC5
Dongle unit G
ID DISCORD, IMM-ECMPROCEDURE 5
(BL-127
)System initialization has
not yet been completed.F
ECM B

BL-120
NATS (NISSAN ANTI-THEFT SYSTEM)

*: When NATS detects trouble, the security indicator lights up while ignition key is in the “ON” position.
*: When the vehicle is equipped with a dongle unit (RHD models), the security indicator blinks 6 times just after the ignition switch is
turned to ON. Then the security indicator lights up while the ignition key is in the “ON” position.

Security indicator
lighting up*

Engine cannot be
startedLOCK MODEPROCEDURE 7
(BL-129 )LOCK MODEWhen the starting opera-
tion is carried out five or
more times consecu-
tively under the follow-
ing conditions, NATS will
shift the mode to one
which prevents the
engine from being
started.

Unregistered ignition
key is used.

IMMU or ECM's mal-
functioning.

MIL staying ON

Security indicator
lighting up*DON'T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(BL-118 )Engine trouble data and
NATS trouble data have
been detected in ECM— SYMPTOMDisplayed “SELF-DIAG
RESULTS” on CON-
SULT-II screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning part or
mode)REFERENCE PART NO.
OF ILLUSTRATION ON
SYSTEM DIAGRAM

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-121
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B
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SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
DIAGNOSTIC SYSTEM DIAGRAM
Diagnostic Procedure 1EIS008F6
Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen
1. Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-IMMU”
displayed on CONSULT-II screen. Ref. part No. B.
2. Replace ECM.
3. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO. OF
ILLUSTRATION ON SYSTEM
DIAGRAM
Security Ind. does not light up.PROCEDURE 6
(BL-128
)Security Ind. —
Open circuit between Fuse and
IMMU—
Continuation of initialization
mode—
IMMU A
Security Ind. does not blink just
after initialization even if the
vehicle is equipped with don-
gle unit.
PROCEDURE 8
(BL-130
)NATS might be initialized with-
out connecting dongle unit
properly.—
Open circuit in ground line of
dongle unit circuitC6
Security Ind. does not blink just
after ignition switch is turned to
ON when some malfunction
related to NATS is detected
even if the vehicle is equipped
with dongle unit.Open or short circuit in commu-
nication line between IMMU
and dongle unitC5
Dongle unit G
SEL028X
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BL-128
NATS (NISSAN ANTI-THEFT SYSTEM)

Diagnostic Procedure 6EIS008FB
“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?
Yes >> GO TO 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. Turn ignition switch OFF.
2. Disconnect security indicator lamp connector.
3. Check voltage between security indicator lamp harness connector M28 terminal 2 (L) 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
Apply 12V direct current to security indicator lamp harness connec-
tor M34 terminals 1 and 2.
OK or NG
OK >> GO TO 5.
NG >> Replace security indicator lamp.2 (L) – Ground : Battery voltage.
PIIB0382E
Security indicator lamp should illuminate.
PIIB0383E

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-129
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B
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5. CHECK IMMU FUNCTION
1. Connect NATS IMMU connector.
2. Disconnect security indicator lamp connector.
3. Check continuity between NATS IMMU harness connector E109 terminal 5 (OR) and ground.
OK or NG
OK >> Check harness for open or short between security indi-
cator lamp and NATS IMMU.
NG >> NATS IMMU is malfunctioning.

Replace NATS IMMU. Ref. part No. A

Perform initialization with CONSULT-II.

For initialization, refer to “CONSULT-II operation man-
ual NATS”.
Diagnostic Procedure 7EIS008FC
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 shown in figure?
Ye s > > G O T O 2 .
No >> GO TO BL-119, "
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?
Yes >> System is OK. (Now system is escaped from “LOCK MODE”.)
No >> GO TO 3.
3. CHECK IMMU ILLUSTRATION
Check NATS IMMU installation. Refer to BL-131, "
How to Replace NATS IMMU" .
OK or NG
OK >> GO TO 4.
NG >> Reinstall NATS IMMU correctly.5 (OR) – Ground : Continuity should exist intermittently.
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SEL960W

BL-130
NATS (NISSAN ANTI-THEFT SYSTEM)

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?
Ye s > > S y s t e m i s O K .
No >> GO TO 5
5. PERFORM INITIALIZATION WITH CONSULT-II AGAIN
1. Replace NATS 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. (NATS 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 8EIS008FD
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 harness connector M80 terminal 1 (B) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
SEL297W
SEL297W
1 (B) – Ground : Continuity should exist.
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