[SOLVED] Access is Lost during TCU Firmware Update

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Ripped
Posts: 10
Joined: Mon Feb 11, 2019 3:43 pm
Vehicle: F150, 3.5L ecoboost, 2017

[SOLVED] Access is Lost during TCU Firmware Update

Post by Ripped »

Hello,

Anyone with experience programming firmware on a large module like the TCU know why am I getting the message "Access is lost" just before the module update is completed?

Thank you!
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Last edited by Ripped on Sat Sep 12, 2020 10:33 pm, edited 3 times in total.
Ripped
Posts: 10
Joined: Mon Feb 11, 2019 3:43 pm
Vehicle: F150, 3.5L ecoboost, 2017

Re: Access is Lost during TCU Firmware Update

Post by Ripped »

I figured it out. All I had to do was Stop activity on the buses and the firmware loaded fine.
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