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

Electric Controlled Coupling

In response to command current from AWD control unit, control clutch pull-in force is generated at the electromagnet and torque is generated at the control clutch.
The cam operates in response to control clutch torque and applies pressure to main clutch.
Main clutch transmits torque from input shaft to output shaft, according to the amount of pressure.

Fig 1: Cutaway View Of Electric Controlled Coupling
Courtesy of NISSAN MOTOR CO., U.S.A.
The actual amount of torque transfer is determined by control current as shown in figure.

Fig 2: Torque Transfer & Control Current Graph
Courtesy of NISSAN MOTOR CO., U.S.A.

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.