Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2009M35X AWD V6-3.5L (VQ35HR)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYDESCRIPTION AND OPERATIONINTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONSYSTEM DESCRIPTION
2009 Infiniti M35x AWD V6-3.5L (VQ35HR)
System Description
2009 Infiniti M35x AWD V6-3.5L (VQ35HR)SECTION System Description
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
System Description
- The engine start function of Intelligent Key system is a system that makes it possible to start and stop the engine without removing the key. It verifies the electronic ID using two-way communications when pressing the push-button ignition 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 (Intelligent Key unit).
NOTE:
The driver should always carry the intelligent key at all times.
- Intelligent Key has 2 IDs (for Intelligent Key and for immobilizer). It can perform the door lock/unlock operation and the push-button ignition switch operation when carrying the registered Intelligent Key.
- When the Intelligent Key battery is discharged, it can be used as emergency by inserting the Intelligent Key to the key slot. At that time, perform the immobilizer ID verification. If it is used when carrying the Intelligent
Key, perform the Intelligent Key ID verification.
- If the ID is successfully verified, and when push-button ignition switch is pressed, steering lock will be released and initiating the engine will be possible.
- If the door lock/unlock operation is performed when the Intelligent Key battery is discharged, all doors lock/unlock can be performed by operating the driver door key cylinder using the mechanical key set into the
Intelligent Key.
- Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the owner.
NOTE:
- Refer to Locations for any functions other than engine start function of Intelligent Key system.
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
- In the Intelligent Key system of model Y50, the transponder (the chip for immobilizer ID verification) is integrated into the Intelligent Key. (For the conventional models, it is integrated into the mechanical key.) Therefore, the mechanical key cannot perform the ID verification, and thus it cannot start the engine. Instead of it, the immobilizer ID verification can be performed by inserting the Intelligent
Key into the key slot, and then it can start the engine.
- When registering the Intelligent Key, 2 registration procedures (immobilizer ID registration and Intelligent Key ID registration) should be performed. The immobilizer ID registration is the procedure that registers the ID stored into the transponder (integrated into Intelligent Key) to the BCM. The Intelligent Key ID registration is the procedure that registers the ID to the Intelligent Key unit. Each registration is a different procedure.
- When performing the Intelligent Key ID registration only, the engine cannot be started by inserting the key into the key slot. When performing the engine immobilizer ID registration only, the engine cannot be started by the operation when carrying the key. The registrations of both systems should be performed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.