Proof of auto schedule problems

[workingonit]

Originally Posted by StephenVA

Never plug these scanners with the engine running...Bad things happen.

Maybe StephenVA meant not to plug-in a scan-tool after the engine is already running (or unplugging it while the scan-tool is processing, while both it and the engine are running; both are operational mistakes that I made two weeks ago https://xoutpost.com/bmw-sav-forums/...on-switch.html.

Originally Posted by andrewwynne

Yeah that's not true. Many of the things the scanner is for obviously require the engine running. Eg monitoring O₂ sensor output, testing injectors.

Coding changes while running that's asking for trouble.

I've learned my lesson, and will never plug-in or out a scan-tool when the engine is on, and always make sure that my battery voltage is supplemented whenever I'm using diagnostic tools.

Even if the engine is on, it won't hurt to leave a charger/maintainer still working: the alternator will not be damaged, nor will the battery, in charging at low amperage. And definitely a must if coding (something I've not tried, yet), or downloading software (on a PC or laptop, using a UPS while downloading software is a must, as is maintaining 50% or more charge level). At least that's the way trusted YouTubers do their coding or software downloading, as far as I know.