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.
2009 Infiniti M35 BaseFACTORY OEM SERVICE PROCEDURE
Service Information: Precautions: Precaution
- Before connecting or disconnecting the AWD control unit harness connector, turn ignition switch "OFF" and disconnect battery ground cable. Because battery voltage is applied to AWD control unit even if ignition switch is turned "OFF".
- When connecting or disconnecting pin connectors into or from AWD control unit, take care not to damage pin terminals (bend or break). When connecting pin connectors, make sure that there are no bends or breaks on AWD control unit pin terminal.
- Before replacing AWD control unit, perform AWD control unit input/output signal inspection and make sure whether AWD control unit functions properly or not. Refer to "AWD CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE ".
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.