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
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
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< FUNCTION DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
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• 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
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
.
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
1.
BCM M18, M20
(view with instrument panel LH removed)
2.
Intelligent Key unit M70
(view with instrument panel LH removed)
3.
IPDM E/R
E119, E120, E122, E124
4.
ECM E16
5.
Key switch and ignition knob switch M12
(view with steering column removed)
6.
Steering lock solenoid M15
7.
Remote keyless entry receiver M25
(view with instrument panel RH removed)
8.
A/T shift selector (park position switch)
M203
(view with center console removed)
9.
Center console area antenna
(front) M210
(view with center console removed)
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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< FUNCTION DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
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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.
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