rac4avic Posted October 3, 2010 Report Share Posted October 3, 2010 What could cause a very slight, high-pitched noise that gets higher in tone with the press of the gas pedal? Even if I turn the radio off, it is there. It doesn't matter what mode it's in. I did not have the noise with the previous factory JBL radio (Toy Highlander 2006). The unit is grounded to the chassis. All functions work properly, including the pin hack. I do have the HD radio unit installed as well, and the backup camera. Thanks for any thoughts. Quote Link to post Share on other sites
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