Infiniti G37 Coupe. Manual - part 1131

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

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< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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A.

View with battery cover removed.

B.

View with instrument assist lower 
panel removed.

C.

View with instrument driver lower 
cover removed.

D.

View with instrument driver lower 
cover removed.

E.

View with instrument driver lower 
cover removed.

F.

View with front bumper removed.

1.

Key slot M22

2.

Combination meter (Key warning 
lamp) M53 

3.

Driver side door lock assembly (door 
key cylinder switch) D15

4.

Power window main switch D8

5.

Driver side  door switch B16

6.

Trunk lid lock assembly (trunk room 
lamp switch) B303

7.

Hood switch E30

8.

TCM F151

9.

A/T device (detention switch) M137

10. ASCD clutch switch (ASCD models) 

E108
ICC clutch switch (ICC models) E113

A.

View with front door finisher re-
moved.

B.

View with trunk lid finisher removed. C.

View with hood switch incorporated 
into hood lock (RH).

D.

Inside of A/T (built into A/T).

E.

View with center console assembly 
removed.

F.

View with instrument driver lower 
cover removed.

JMKIA1272ZZ

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[INTELLIGENT KEY SYSTEM]

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

Component Description

INFOID:0000000001699912

Component Reference

BCM

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Steering lock unit

SEC-85

Push-button ignition switch

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Door switch

DLK-66

key slot

SEC-121

A/T device (detention switch) (A/T models)

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Inside key antenna

DLK-59

Remote keyless entry receiver

DLK-96

Stop lamp switch

SEC-58

Park/neutral position switch (A/T models)

SEC-64

Clutch switch (M/T models)

SEC-112

ASCD clutch switch (M/T models with ASCD)

SEC-124

ICC clutch switch (M/T models with ICC)

SEC-124

Steering lock relay

SEC-76

Starter relay

SEC-79

Starter control relay

SEC-63

Security indicator

SEC-135

Key warning lamp

SEC-134

VEHICLE SECURITY SYSTEM

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VEHICLE SECURITY SYSTEM

System Diagram

INFOID:0000000001699913

System Description

INFOID:0000000001699914

INPUT/OUTPUT SIGNAL CHART

OPERATION FLOW

SETTING THE VEHICLE SECURITY SYSTEM

Initial Condition

• Ignition switch is in OFF position.

JMKIA0056GB

Switch

Input signal to BCM

BCM system

Actuator

All door switch

Open or close

Vehicle security system

• IPDM E/R
• Head lamp
• Horn
• Security indicator lamp

Trunk room lamp switch

Hood switch

Door key cylinder switch

Lock or unlock

Door lock and unlock switch

Door request switch

Intelligent Key

Lock or unlock

Panic alarm

PIIA1367E

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[INTELLIGENT KEY SYSTEM]

VEHICLE SECURITY SYSTEM

Disarmed Phase

• When hood, doors or trunk is open, the vehicle security system is set in the disarmed phase on the assump-

tion that the owner is inside or near the vehicle.

• When the vehicle security system is in the disarmed phase, the security indicator lamp blinks every 2.4 sec-

onds.

Pre-armed Phase and Armed Phase

When the following operation 1 or 2 is performed, the vehicle security system turns into the “pre-armed”
phase. (The security indicator lamp illuminates.)

1.

BCM receives LOCK signal from front door key cylinder switch or Intelligent Key, after hood, trunk and all
doors are closed.

2.

Hood, trunk and all doors are closed after front doors are locked by key or door lock and unlock switch.
The security indicator lamp illuminates for 30 seconds. Then, the system automatically shifts into the
“armed” phase.

CANCELING THE SET VEHICLE SECURITY SYSTEM

When one of the following operations is performed, the armed phase is canceled.

1.

Unlock the doors with the key or Intelligent Key.

2.

Turn ignition switch “ON” or “ACC” position.

CANCELING THE ALARM OPERATION OF THE VEHICLE SECURITY SYSTEM

When unlocking the door with the key or Intelligent Key the alarm operation is canceled.

ACTIVATING THE ALARM OPERATION OF THE VEHICLE SECURITY SYSTEM

Check that the system is in the armed phase. (The security indicator lamp blinks every 2.4 seconds.)
When the following operation 1 or 2 is performed, the system sounds the horns and flashes the headlamps for
about 50 seconds.
1.

Hood, trunk or any door is opened during armed phase.

2.

Disconnecting and connecting the battery connector before canceling armed phase.

PANIC ALARM OPERATION

Intelligent Key system may or may not operate vehicle security system (horn and headlamps) as required.
When the Intelligent Key system is triggered, ground is supplied intermittently to both headlamp relay and horn
relay.
When headlamp relay and horn relay are energized, then power is supplied to headlamps (LH and RH) and
horns (HIGH and LOW).
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds or when BCM receives any signal from Intelligent Key.