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What could be an electronic whining noise in the passenger compartment of your Mitsubishi Montero Sport while engine runs fine?

Here are some potential causes of an electronic whining noise in the passenger compartment of a Mitsubishi Montero Sport while the engine is running fine:

1. Power Steering Pump: Listen carefully to the noise and try to identify if it is coming from the area near the steering column. If the whining noise increases when you turn the steering wheel, it could be an issue with the power steering pump.

2. Alternator: The alternator is responsible for charging the battery and providing power to the vehicle's electrical components. A faulty or failing alternator can produce a whining noise. Check if the noise changes or becomes more prominent when you turn on additional electrical components like headlights or the air conditioner.

3. Bad Wiring or Grounding: Sometimes, loose or damaged wiring or poor grounding can cause electrical interference and result in a whining noise. Check the wiring connections and grounding points in the affected area for any loose or corroded connections.

4. Blower Motor: The blower motor for the climate control system can also make a whining noise if it is faulty or has debris stuck in it. Turn on the fan at different speeds and listen to see if the noise changes or goes away.

5. Electronic Control Modules: The Mitsubishi Montero Sport has several electronic control modules that manage various systems. A malfunctioning or faulty module could produce a whining noise.

_Since diagnosing electrical problems can be complex, it is recommended to take your vehicle to a qualified mechanic or automotive electrician for proper diagnosis and repair._