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Discussion Starter #21
The humming sound happened again this morning. It was on the lcd screen area. It was stop after I completely turned off the engine ( took about 6 seconds). It was starting right after I started the engine for the first time.
 

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are you refering to the LCD screen of the infotainment center or the small screen between the speedo and tach on the dash? If its the infotainment center, the Sienna still come with a cd player. Might want to check if there is a cd in there or not. Could be that there is a cd in there and its spinning up...
 

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Discussion Starter #23
The one on the ctr. There wasnt cd. It happens when freezing only; im not sure that is coincidence or not.
 

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Discussion Starter #24
This morning, it happened again. Temp was about 25F here in philiy. And I made sure it was not the sound from the cd player. Turn the engine off, wait about 5-7 seconds gone.
 
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