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.

2004 Infiniti FX45FACTORY OEM SERVICE PROCEDURE

2. Check Unlock Sensor Circuit

Turn ignition knob LOCK position.
Disconnect Intelligent Key unit and front door lock assembly (driver side) connector.
Check continuity between Intelligent Key unit connector M34 terminal 28 (W/B) and front door lock assembly (driver side) connector D10 terminal 4 (W).
1. 28 (W/B) - 4 (W) : Continuity should exist.

Fig 1: Checking Continuity Between Intelligent Key Unit Connector M34 Terminal 28 And Front Door Lock Assembly (Driver Side) Connector D10 Terminal 4

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : GO TO 3.

NG : Repair or replace harness between Intelligent Key unit and front door lock assembly (driver side).

Factory Service Tools

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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.