NISSAN VERSA 2006 Workshop Service Repair Manual

BL-212
NATS (NISSAN ANTI-THEFT SYSTEM)
Revision: June 20062007 Versa
NATS (NISSAN ANTI-THEFT SYSTEM)PFP:28591
Component Parts and Harness Connector LocationEIS0093N
LIIA2596E
1. BCM M18, M19, M20
(view with glove box removed)2. Intelligent Key unit M52
(if equipped)3. NATS antenna amp. M21
(inside steering column)
4. Combination meter M24 5. Security indicator lamp 6. ECM E16

NATS (NISSAN ANTI-THEFT SYSTEM)
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System DescriptionEIS0093O
DESCRIPTION
NOTE:
If customer reports a “No start” condition, request ALL KEYS to be brought to a Nissan dealer in case
of a NATS malfunction.
NATS (Nissan Anti-Theft System) has the following functions:

NATS shows a higher anti-theft performance at preventing engine to be started by an unregistered key.
(registered key: mechanical key and Intelligent Key).

Only a key with key ID registered in BCM and ECM can start engine, it has a higher protection against
auto theft that duplicates keys.

If a malfunction has been detected, security indicator will illuminate when ignition switch is in ON position.

If the owner requires, mechanical key can be registered for up to 5 keys.

During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added,
registration* is required.
*: All mechanical keys of the vehicle should be registered.
–ECM
–BCM
–Mechanical key

NATS trouble diagnoses, system initialization and additional registration of other NATS mechanical key
IDs must be carried out using CONSULT-II hardware and CONSULT-II NATS software. When NATS ini-
tialization has been completed, the ID of the inserted mechanical key can be displayed.
Regarding the procedures of NATS initialization and mechanical key ID registration, refer to CONSULT-II
operation manual NATS.
SECURITY INDICATOR

Forewarns that the vehicle is equipped with NATS.

Security indicator will not blink while the ignition knob is in ON or START state.
NOTE:
Because security indicator is highly efficient, the battery is barely affected.
Condition of Security Indicator

When operating the ignition switch with Intelligent Key, security indicator lamp will turn off at once if igni-
tion switch is pressed and blinks when ignition switch is released.

When operating the ignition switch with mechanical key security indicator will turn off at once if mechani-
cal key is inserted into key cylinder and blinks when mechanical key is removed.
(Once the mechanical key is inserted into key cylinder, BCM will only perform the key ID verification with
mechanical key)
System CompositionEIS0093P
The function of the NATS consists of the following:

Mechanical key

NATS antenna amp. located in the ignition key cylinder

BCM

ECM (Engine control module)

Security indicator

Intelligent Key unit (if equipped)

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NATS (NISSAN ANTI-THEFT SYSTEM)
Revision: June 20062007 Versa
NOTE:
The communication between ECM, BCM and/or Intelligent Key unit uses the CAN communication sys-
tem.
ECM Re-communicating FunctionEIS0093Q
Performing the following procedure can automatically perform re-communication of ECM and BCM or Intelli-
gent Key unit, but only when the ECM has been replaced with a new one 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. Use a registered key (*), turn ignition switch to “ON”.
*: To perform this step, use the key that has been used before to perform 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.
LIIA2637E

NATS (NISSAN ANTI-THEFT SYSTEM)
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Wiring Diagram — NATS —EIS0093R
WIWA1975E

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NATS (NISSAN ANTI-THEFT SYSTEM)
Revision: June 20062007 Versa
Terminals and Reference Values for BCMEIS0093U
Refer to BCS-12, "Terminals and Reference Values for BCM" .
CONSULT-II FunctionEIS0093V
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Insert NATS program card into CONSULT-II.
3. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
4. Turn ignition switch ON.
5. Touch “START”.
6. Touch “OTHER”.
7. Select “NATS V.5.0”.
If “NATS V5.0” is not indicated, go to GI-40, "
CONSULT-II Data
Link Connector (DLC) Circuit" . Program card : NATS (AEN06B)
LIIA2663E
PBR4 55 D
PIIB0900E
PIIA9327E

NATS (NISSAN ANTI-THEFT SYSTEM)
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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
*: When replace ECM, refer to BL-214, "ECM Re-communicating Function" .
NOTE:

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

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

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 mechanical keys are necessary.
[NATS mechanical key/ BCM/ ECM*]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
Refer to BL-218, "
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART" .
PIIA1124E

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NATS (NISSAN ANTI-THEFT SYSTEM)
Revision: June 20062007 Versa
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items
[NATS program card screen terms]P No. Code
(Self-diagnostic
result of
“ENGINE”)Malfunction is detected when.....Reference
page
CHAIN OF ECM-IMMU
[P1612]NATS MAL-
FUNCTION
P1612Communication impossible between ECM and BCM
In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.BL-223
CHAIN OF IMMU-KEY
[P1614]NATS MAL-
FUNCTION
P1614BCM cannot receive the key ID signal.BL-225
ID DISCORD, IMM-ECM
[P1611]NATS MAL-
FUNCTION
P1611The result of ID verification between BCM and ECM is
NG. System initialization is required.BL-227
LOCK MODE
[P1610]NATS MAL-
FUNCTION
P1610When the starting operation is carried out five or more
times consecutively under the following conditions, NATS
will shift the mode to one which prevents the engine from
being started.

Unregistered mechanical key is used.

BCM or ECM’s malfunctioning.BL-229
DON'T ERASE BEFORE CHECK-
ING ENG DIAG—All engine trouble codes except NATS trouble code has
been detected in ECM.BL-220

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Trouble Diagnosis ProcedureEIS0093W
PRELIMINARY CHECK
1. GET SYMPTOMS
Listen to customer complaints request. (Get symptoms)
NOTE:
If customer reports a “No start” condition, request all Intelligent Keys to be brought to the dealer in case of
Intelligent Key system malfunction.
Intelligent Key or mechanical key service request>> For further information, refer to CONSULT-II operation
manual.
Malfunctions>>GO TO 2.
2. START ENGINE WITH INTELLIGENT KEY (IF EQUIPPED)
Check if the engine could be started by all registered Intelligent Keys.
The engine cannot be started by some Intelligent Keys>>Intelligent Key is low battery or malfunction. Refer
to BL-159, "
Intelligent Key Battery Replacement" .
The engine cannot be started by all Intelligent Keys>>GO TO 3.
The engine can be started by all Intelligent Keys>>GO TO 4.
3. CHECK “KEY” WARNING LAMP ILLUMINATION
When pushing the ignition switch, check if “KEY” warning lamp in combination meter illuminates.
KEY warning lamp illuminates green>>GO TO BL-114, "
KEY WARNING LAMP (GREEN) ILLUMINATES" .
KEY warning lamp illuminates red>>GO TO BL-114, "
KEY WARNING LAMP (RED) ILLUMINATES" .
Does not illuminate>>GO TO BL-115, "
KEY WARNING LAMP DOES NOT ILLUMINATE" .
4. START ENGINE WITH MECHANICAL KEY
Check if the engine could be started by all registered mechanical keys.
The engine can not be started by some mechanical keys>>Register mechanical key. Refer to CONSULT-II
operation manual.
The engine cannot be started by all mechanical keys>> BL-220, "
WORK FLOW" .
The engine can be started by all mechanical keys>>GO TO 5.
5. PERFORM SELF-DIAGNOSIS
1. Turn ignition switch to ON by carrying the Intelligent Key.
2. Perform self-diagnosis of Intelligent Key system with CONSULT-II.
Malfunction is detected>>GO TO B L - 111 , "
SELF-DIAGNOSTIC RESULTS" .
No malfunction is detected>>GO TO BL-110, "
WORK FLOW" .

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NATS (NISSAN ANTI-THEFT SYSTEM)
Revision: June 20062007 Versa
WORK FLOW
1. STARTING ENGINE
Check if the engine could be started by inserting the mechanical key into the ignition key cylinder and operate
ignition switch.
OK >> System is normal.
NG >> GO TO 2.
2. PERFORM SELF DIAGNOSIS
Perform SELF-DIAGNOSIS “NATS V5.0” using CONSULT-II.
NOTE:
NATS program card is necessary to display the “SELF-DIAGNOSIS”.
No malfunction is detected>>Recheck the starting engine section GO TO 1.
Malfunction related to NATS is detected>>GO TO 3.
Malfunctions related to “DON’T ERASE BEFORE CHECKING ENG DIAG” and NATS are detected>>GO
TO 7.
3. IDENTIFYING NATS MALFUNCTION
Self-diagnosis results referring to NATS, but no information about engine self-diagnosis result is displayed on
CONSULT-II. Refer to BL-222, "
SYMPTOM MATRIX CHART 1" .
>> GO TO 4.
4. NATS TROUBLE DIAGNOSIS
Repair NATS (if necessary, perform “C/U INITIALZATIN” with CONSULT-II.)
>> GO TO 5.
5. ERASE SELF-DIAGNOSIS
Erase the record of “SELF-DIAGNOSIS” by using CONSULT-II.
>> GO TO 6.
6. STARTING ENGINE
Check if the engine could be started by inserting the mechanical key into the ignition key cylinder and operate
ignition switch.
NG >> GO TO 2.
OK >> End of inspection.
7. IDENTIFYING NATS AND ENGINE CONTROL MALFUNCTION
NATS malfunction and “DON’T ERASE BEFORE CHECKING ENG DIAG” are displayed on the CONSULT-II
screen.
NOTE:
This indication means that malfunction have been detected in NATS and engine control system.
>> GO TO 8.

NATS (NISSAN ANTI-THEFT SYSTEM)
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8. NATS TROUBLE DIAGNOSIS
Repair NATS according to self-diagnosis results refer to NATS (if necessary, perform “C/U INITIALZATIN” with
CONSULT-II.)
NOTE:
Do not erase “SELF-DIAGNOSIS” by using CONSULT-II.
>> GO TO 9.
9. IDENTIFYING ENGINE CONTROL MALFUNCTION
Check engine “SELF-DIAGNOSIS” records with a generalized program card instead of the NATS program
card.
>> GO TO 10.
10. ENGINE CONTROL SYSTEM TROUBLE DIAGNOSIS
Repair engine control system if engine related malfunction is detected.
With engine diagnostic codes present, refer to EC-8, "
INDEX FOR DTC" .
Without engine diagnostic codes present, refer to EC-83, "
TROUBLE DIAGNOSIS" .
NOTE:
If only “NATS MALFUNCTION” is displayed, erase the self-diagnosis results.
>> GO TO 11.
11 . STARTING ENGINE
Check if the engine could be started by inserting the mechanical key into the ignition key cylinder and operate
ignition switch.
OK >> GO TO 12.
NG >> GO TO 2.
12. ERASE SELF-DIAGNOSIS
Erase both NATS and ENGINE "SELF-DIAGNOSIS" records by using CONSULT-II NATS program card and
generalized program card.
>> GO TO 13
13. COMFIRMATION
Perform running test with CONSULT-II in engine “SELF-DIAGNOSIS” mode.
“NO DTC” is displayed>> End of inspection.
Malfunction information is displayed>> GO TO 2.