Do I NEED to use a Battery Support Unit (BSU) when programming to a ECU?

[@sandyande]

Thanks for sharing how much is the battery support unit cheers sandy

[@citylockapolytechnikeyllcc7936]

Nice video... of course the fuel guage would not aply to a LEAF, Tesla, 2014 Rav4EV or other all-electric. Unlikely most would be reflashing those but as time goes on......

[@user-de6kh6uu2x]

Could i run a battery support unit from a 3kw generator?

[@AM-pbstill1618]

is it normal for the fuse box to get warm/hot when performing this?

[@brendanrandle]

couldn't you just pull the fan relay to get away with the 25amp unit if the car has larger fans

[@TheOBDcompany]

Brendan Randle
You could but this doesn't solve the draw on the battery on for instance a 2009 Range Rover with air suspension that power down the air compressor and all the ECUs on the car to which there is many. All these ECUs create a big draw of power on the battery and a battery support unit is still needed even if the radiator fans was disconnected
I hope this helps!
Lewis

[@pratikmistry9307]

Can u share a video for how to emulate an ECU?

[@karluk7724]

Why would the fan come on if the engine is off?

[@TheOBDcompany]

When the cars computer is programmed the fan comes on as a fail safe as while the ECU is being programmed it doesn't know if the engine is hot or cold so it cools it to be on the safe side

[@markreid1587]

What would you use to go fully mobile

[@TheOBDcompany]

Split charge relay, inverter and leisure battery

[@Denis_panait]

Your kess v2 is original / EU clone / China clone ?

[@TheOBDcompany]

Original genuine KESS

[@jamesscully9403]

Autotuner is quicker