I was having this issue as well. I found in another thread that turning off contact sync on your iPhone under the Bluetooth connections eliminates the issue. I tried this and all is well.
‘19 Highlander display issues.
For the past 4 months the display screen flashes on and off unless I turn the Bluetooth off on my phone. Typically if I disconnect and reconnect my phone, the problem is resolved unless a call comes it at which point the display turns off, eliminating navigation or hands free calls while driving. I have disconnected the phone and reconnected it, forgotten the Bluetooth connection and then reconnected it after I turned off my phone (advice of the dealer) but it continues to flash on and off unless the phone is not connected at all. The dealer claims that it is a result of and IOS update.
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Yeah, you could do as DriveCrazy suggests, but I’ve seen lots of remedies posted, none of which accounts for the fact that it’s a known defect and your dealer should be willing to replace the entire enTune unit. It wasn’t until that was done that we solved our constant rebooting issue.I was having this issue as well. I found in another thread that turning off contact sync on your iPhone under the Bluetooth connections eliminates the issue. I tried this and all is well.
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