2008 INFINITI QX56 Factory Service Manual

jump cable charging fuses wheel open hood fuel pressure

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INFINITI QX56 2008 Factory Service Manual INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONSEC-9
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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FUNCTION DIAGNOSIS
INTELLIGENT KEY SYSTEM /ENGINE START FUNCTIO

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INFINITI QX56 2008 Factory Service Manual SEC-10
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
• Intelligent Key has 2 IDs (for Intelligent Key and for
NATS). It can perform the door lock/

SEC-10
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
• 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 igniti on 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-17, "
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 Inte lligent Key. Therefore, the Intellig ent 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-34, "
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 th at 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-13, "
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).
Revision: March 2010 2008 QX56

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INFINITI QX56 2008 Factory Service Manual INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONSEC-11
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Component Parts LocationINFOID:0000000001539102
ALKIA0958ZZ
1.

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INFINITI QX56 2008 Factory Service Manual SEC-12
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Component Description
INFOID:0000000001539103
10. Inside key antenna 1 (rear of center con- sole

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INFINITI QX56 2008 Factory Service Manual NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-13
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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
System Diagra

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INFINITI QX56 2008 Factory Service Manual SEC-14
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE I
MMOBILIZER SYSTEM-NATS)
- Mechanical key
- Intelligent Key unit
- Remote keyless entry receiver
- Steering lock soleno

SEC-14
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE I
MMOBILIZER SYSTEM-NATS)
- Mechanical key
- Intelligent Key unit
- Remote keyless entry receiver
- Steering lock solenoid
• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be
carried out using CONSULT-III.
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”. Identify the possible causes according to
“Work Flow”, Refer to SEC-3, "
Work Flow".
• If ECM other than Genuine NISSAN is installed, t he engine cannot be started. For ECM replacement proce-
dure, refer to SEC-8, "
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 fo r this procedure. Before starting the registration oper-
ation collect all registered Intelligent Keys from the customer.
• The NATS ID registration is the procedure that regi sters the ID stored into the transponder (integrated in
mechanical key) to BCM.
The Intelligent Key ID registration is the procedur e 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: LOCK) condition on ignition knob LOCKposition.
• Always flashes with ignition knob released (ignition knob switch: LOCK) condition on mechanical key removed position.
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.
• Intelligent Key unit
• BCM
•ECM
• Mechanical key
• Steering lock solenoid
• NATS antenna amp.
Revision: March 2010 2008 QX56

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INFINITI QX56 2008 Factory Service Manual NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-15
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Component Parts LocationINFOID:0000000001539106
Component De

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INFINITI QX56 2008 Factory Service Manual SEC-16
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE I
MMOBILIZER SYSTEM-NATS)
Inside key antenna Detects if Intelligent Key is inside the vehicle.
Intelligent Key warning

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