Nissan Tiida C11. Manual - part 1160

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< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

NATS (NISSAN ANTI-THEFT SYSTEM)

NATS (NISSAN ANTI-THEFT SYSTEM)

System Diagram

INFOID:0000000001404038

System Description

INFOID:0000000001404039

INPUT/OUTPUT SIGNAL CHART

Intelligent Key Unit

BCM

SYSTEM DESCRIPTION

NATS (Nissan Anti-Theft System) has the following immobilizer functions:
• Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the

owner.

• Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance

to prevent key from being copied or stolen.

• Security indicator always flashes with mechanical key removed condition (key switch: OFF) and ignition

knob released condition on LOCK position (ignition knob switch: OFF). 

• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to 

XX-XX,

"*****"

.

• If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
• If the owner requires, ignition key ID or mechanical key ID can be registered for up to 4 keys.
• During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added,

registration* is required. 

*1

: All keys kept by the owner of the vehicle should be registered with mechanical key.

- ECM
- BCM

LIIA2537E

Switch/Input signal

Input signal to BCM

BCM function

Actuator/Output signal

Ignition knob switch

Ignition knob
(push/release)

NATS

• Steering lock unit

Key switch

Mechanical key
(Insert/remove)

Steering lock unit

Steering
(lock/unlock)

ECM

Engine status signal

Switch/Input signal

Input signal to BCM

BCM function

Actuator/Output signal

NATS antenna amp.

Key ID

NATS

• Security indicator lamp
• Starter request

ECM

Engine status signal

NATS (NISSAN ANTI-THEFT SYSTEM)

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< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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- Mechanical key
- ABS actuator control unit
- EPS control unit
- IPDM E/R
• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be

carried out using CONSULT-III hardware and SECURITY CARD.
When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs
can be carried out.

• Possible symptom of NATS malfunction is “Engine cannot start”. In C11, the engine can be started with the

Intelligent Key system and NATS. Identify the possible causes according to “Work Flow”, Refer to 

SEC-4,

"Work Flow"

.

• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-

dure, refer to 

SEC-7, "ECM RE-COMMUNICATING FUNCTION : Description"

.

PRECAUTIONS FOR KEY REGISTRATION

• The key registration is a procedure that erases the current NATS ID once, and then re-registers a new ID.

Therefore the registered Intelligent Key is necessary for this procedure. Before starting the registration oper-
ation collect all registered Intelligent Keys from the customer.

• The NATS ID registration is the procedure that registers the ID stored into the transponder (integrated in

mechanical key) to BCM.
The Intelligent Key ID registration is the procedure that registers the ID to Intelligent Key unit.

• When performing the Intelligent Key system registration only, the engine cannot be started by inserting the

key into the key cylinder. When performing the NATS registration only, the engine cannot be started by using
the mechanical key.

SECURITY INDICATOR

• Always flashes with ignition knob released (ignition knob switch: OFF) condition on ignition knob LOCK posi-

tion. 

• Always flashes with ignition knob released (ignition knob switch: OFF) condition on mechanical key removed

position. 

• Turns ON steady when the NATS is activated. 

MAINTENANCE INFORMATION

CAUTION:

It is necessary to perform NATS ID registration when replacing any of the following part.
If it's not (or fail to do so), the electrical system may not operate properly.
• BCM 
• ECM
• Intelligent Key unit
• Intelligent Key
• IPDM E/R
• NATS antenna amp.

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< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

NATS (NISSAN ANTI-THEFT SYSTEM)

Component Parts Location

INFOID:0000000001404040

Component Description

INFOID:0000000001404041

1.

BCM M18, M20
(view with glove box removed)

2.

Intelligent Key Unit M52

3.

NATS antenna amp. M21

4.

Key switch and ignition knob switch 
(A/T) M32

5.

Steering lock solenoid M6
(bottom view of steering column)

6.

ECM E16

7.

Security indicator lamp
M34

ALKIA0845ZZ

Component Reference

BCM

XX-XX, "*****"

Steering lock unit

SEC-23

Key switch

XX-XX, "*****"

Ignition knob switch

XX-XX, "*****"

NATS antenna amp.

SEC-26

Security indicator

SEC-49

IPDM E/R

XX-XX, "*****"

DIAGNOSIS SYSTEM (BCM)

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< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

INFOID:0000000001404046

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

IMMU

IMMU : CONSULT-III Function (BCM - IMMU)

INFOID:0000000001404047

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

Diagnosis mode

Function Description

WORK SUPPORT

Changes the setting for each system function.

SELF-DIAG RESULTS

Displays the diagnosis results judged by BCM. Refer to 

XX-XX, "*****"

.

CAN DIAG SUPPORT MNTR

Monitors the reception status of CAN communication viewed from BCM.

DATA MONITOR

The BCM input/output signals are displayed.

ACTIVE TEST

The signals used to activate each device are forcibly supplied from BCM.

ECU IDENTIFICATION

The BCM part number is displayed.

CONFIGURATION

• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

WORK SUPPORT

DATA MONITOR

ACTIVE TEST

—

BCM

×

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

Air conditioner

AIR CONDITONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

Immobilizer

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Trunk open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

PTC heater system

PTC HEATER

×

×