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Infiniti QX56 (JA60). Manual - part 841

SEC-10

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

FUNCTION DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Diagram

INFOID:0000000005147067

System Description

INFOID:0000000005147068

INPUT/OUTPUT SIGNAL CHART

Intelligent Key Unit

IPDM E/R

BCM

SYSTEM DESCRIPTION

• The engine start function of Intelligent Key system is a system that makes it possible to start and stop the

engine without using the key. It verifies the electronic ID using two-way communications when pressing the

ignition knob switch while carrying the Intelligent Key, which operates based on the results of electronic ID

verification for Intelligent Key using two-way communications between the Intelligent Key and the vehicle.

NOTE:

The driver should carry the Intelligent Key at all times.

Switch/Input signal

Input signal to

Intelligent Key unit

function

Actuator/Output signal

Key switch

Mechanical key
(insert/remove)

Engine start function

• KEY warning lamp/buzzer
• Steering lock solenoid
• Starter relay request (to IPDM E/R)
• Inside key antenna

(Front and rear center console, over-
head console, luggage area)

• Key interlock solenoid

Ignition knob switch

Ignition knob
(push/release)

Steering lock solenoid

Steering lock
(lock/unlock)

Inside key antenna
(Front and rear center console, over-
head console, luggage area)

Intelligent key
(inside antenna detection
area or not.)

Switch/Input signal

Input signal to

IPDM E/R

IPDM E/R function

Actuator/Output signal

Transmission range switch

P, N range

Engine start function

• Starter relay
• Starter motor

Switch/Input signal

Input signal to

BCM

BCM function

Actuator/Output signal

Key switch

Brake
(press/release)

Engine start function

• Inside key antenna

(Front and rear center console, over-
head console, luggage area)

ALKIA0925GB

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-11

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

SEC

• Intelligent Key has 2 IDs (for Intelligent Key and for NATS). It can perform the door lock/unlock operation and

the engine start operation when the registered Intelligent Key is carried.

• When the Intelligent Key battery is discharged, it can be used as emergency back-up by inserting the

mechanical key set in the Intelligent Key to the ignition key cylinder. At that time, perform the NATS ID verifi-

cation. If it is used when the Intelligent Key is carried, perform the Intelligent Key ID verification.

• If the ID is successfully verified, and when the ignition knob switch is pressed, steering lock will be released

and initiating the engine will be possible.

• The door lock/unlock operation can be performed when the Intelligent Key battery is discharged, by operat-

ing the driver door key cylinder using the mechanical key set in the Intelligent Key.

• Up to 4 Intelligent Keys can be registered (including the standard Intelligent Key) on request from the owner.

NOTE:

• Refer to

DLK-21, "INTELLIGENT KEY : System Description"

for any functions other than engine start func-

tion of Intelligent Key system.

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

• For vehicles equipped with the Intelligent Key system, the transponder [the chip for NATS ID verifi-

cation] is integrated into the Intelligent Key. Therefore, the Intelligent Key alone is capable of provid-

ing security clearance for the engine to start. Also, when the mechanical key alone is inserted into

the key cylinder, performs the NATS ID verification to allow the engine to start. For vehicles without

Intelligent Key system, the transponder is integrated into the mechanical key which must be inserted

into the key cylinder to perform the NATS ID verification to allow the engine to start.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

1. When the ignition knob switch is ON, the Intelligent Key unit transmits the request signal to the Intelligent

Key.

2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the Intelligent

Key unit.

3. The Intelligent Key unit receives the Intelligent Key ID signal and verifies it with the registered ID.
4. Intelligent Key unit transmits the steering lock/unlock signal to steering lock solenoid if the verification

results are OK. For detail of key warning message operation, refer to

DLK-38, "System Description"

5. Release of the steering lock.
6. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay

in IPDM E/R ON if BCM judges that the engine start condition is satisfied.

7. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
8. When shift position is in P or N position, battery power is supplied through the starter relay and operate

the starter motor and to start the cranking.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the “KEY” warning message will be dis-

played in the combination meter. At that time, the engine cannot be started.

OPERATION RANGE

Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine might not start

when Intelligent Key is on instrument panel or in glove box.

OPERATION WHEN MECHANICAL KEY IS USED

When the Intelligent Key battery is discharged, performs the NATS ID verification between the integrated tran-

sponder and BCM by inserting the mechanical key into the key cylinder, and then the engine can be started.

For details relating to starting the engine using mechanical key, refer to

SEC-14, "System Description"

STEERING LOCK OPERATION

Steering is locked by steering lock solenoid when ignition switch is in the LOCK position (the ignition knob is

released) and key switch is OFF (key is removed from ignition key cylinder).

SEC-12

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Component Parts Location

INFOID:0000000005147069

ALKIA0958ZZ

BCM M18, M20
(view with instrument panel LH removed)

Intelligent Key unit M70
(view with instrument panel LH removed)

IPDM E/R
E119, E120, E122, E124

ECM E16

Key switch and ignition knob switch M12
(view with steering column removed)

Steering lock solenoid M15

Remote keyless entry receiver M25
(view with instrument panel RH removed)

A/T shift selector (park position switch)
M203
(view with center console removed)

Center console area antenna
(front) M210
(view with center console removed)

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-13

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

SEC

Component Description

INFOID:0000000005147070

10. Center console area antenna (rear)

M209

11. Overhead console area antenna R210

(view with overhead console removed)

12. Luggage area antenna B76

(view with rear carpet removed)

13. Intelligent Key warning buzzer E25

14. Combination meter M23, M24

15. Vehicle security indicator lamp

Item

Function

Intelligent Key unit

Receives lock/unlock signal from remote keyless entry receiver, and then transmits to BCM.

BCM

Verifies the received signal from Intelligent Key, then informs ECM whether to allow engine start.

Remote keyless entry receiver

Receives lock/unlock signal from the Intelligent Key, and then transmits to Intelligent Key unit.

Intelligent Key

Transmits button operation to remote keyless entry receiver.

Steering lock solenoid

Locks the steering wheel when the ignition key is off and the Intelligent Key is outside the vehicle.

Inside key antenna

Detects if Intelligent Key is inside the vehicle.

Intelligent Key warning buzzer

Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.

A/T shift selector (park position
switch)

Detects whether the shift lever is in park.

Content .. 839 840 841 842 ..