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.
2003 Infiniti FX45FACTORY OEM SERVICE PROCEDURE
Intelligent Key System
- Intelligent Key System
- Component Parts And Harness Connector Location
- System Description
- CAN Communication System Description
- Schematic
- Wiring Diagram - I/KEY-
- Terminals and Reference Value for INTELLIGENT KEY UNIT
- Terminals and Reference Value for Steering Lock unit
- Terminals and Reference Value for BCM
- Terminals and Reference Value for IPDM E/R
- Diagnosis Procedure
- CONSULT-II Functions
- Consult-II Inspection Procedure
- CONSULT-II Application Items
- List of Operation Related Parts
- Trouble Diagnosis Symptom Chart
- Check CAN Communication System Inspection
- Check Intelligent Key Unit Power Supply and Ground Circuit
- Check Key Switch (Intelligent Key Unit Input)
- Check Key Switch (BCM Input)
- Check Ignition Knob Switch
- Check Door Switch
- Check Unlock Sensor
- Check Door Request Switch
- Check Intelligent Key Warning Buzzer
- Check Outside Key Antenna
- Check Inside Key Antenna
- Check Steering Lock Unit
- Check Stop Lamp Switch
- Check Detention Switch
- Check Select Unlock Relay
- Check Hazard Function
- Check Horn Function
- Check Headlamp Function
- Check IPDM E/R Operation
- Removal and Installation of Intelligent Key Unit
- Intelligent Key Inspection
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.