Loud Squealing / Buzzing coming from Dash

For several months, our 2005 Range Rover has sporadically made a high pitch electronic squealing sound with a duration of roughly 15 seconds. The noise seems to happen from the dash area on the passenger side of the car. Gradually, the sounds has been occurring more frequent.

I decided enough was enough and I tried to track down the issue, it was a little mysterious, but after some research I have narrowed down the issue to the ECU Fan.

I ordered a new fan from Atlantic British, http://www.roverparts.com/Parts/YQO100000G.cfm . The part was about $85 dollars with shipping. Replacing the fan was very easy and relatively straight forward.

Below is a journal of the steps I followed in my repair.

Step 1: Disconnect the Battery.

Step 2: I located the ECU Box and removed Allen Bolts. Remove Black Plastic Cover.

Step 3: Using a Flashlight, I located the ECU Fan on the bottom of the ECU Box towards the front of the car.

Step 4: There are several wire harness that blocked my way. To move a harness, I gently pulled up and they will slide out off their sleeves. I moved harnesses as needed.



Step 5: Using a long Phillips head screwdriver, I unscrewed the two screws holding the ECU Fan in place.

Step 6: I disconnected the wiring for the ECU Fan.

Step 7: I removed the old fan.

Step 8: Space is cramped in the ECU Box, I placed screws into holes of the new ECU Fan and carefully lowered the fan into place. The funnel end goes into the tube.

Step 9: I tightened the two screws.

Step 10: I plugged the new ECU Fan Wiring into harness.



Step 11: I slide all harnesses that I moved back into place.

Step 12: I replaced the cover on ECU Box.

Step 13: I reconnected the Battery.

Step 14: Started my car, and enjoyed a peaceful drive.

Disclaimer: Use the information on this site AT YOUR OWN RISK. I am not a mechanic, nor do I play one on Television. I am describing how I resolved an issue on my own vehicle. I am not making recommendations on how to fix your vehicle and will not not liable for any damages done to your vehicle related to information on this site.