Anyone have trouble with the s300 disconnecting while tunning or with laptop connected viewing sensors.How do you solve this problem.

 

Do you have any aftermarket ignition components ?

 

Yep MSD coil and digital 7.

 

The aftermarket ignition systems can cause interference with the s300. That's likely your problem.

 

I have same
problem how can it be solved.

 

Get a USB cable with a large noise suppressor in it.

OR

Move your ignition components as far away from the ECU as possible.

 

+2

 

i had this happen to a few S300 ecus i tuned. all cars had stock ignition systems.

 

Make sure j12 is removed in the ecu

 

i had many s300 and kpro's drop using my dell laptop. i've tuned many cars from stock k's to tucked setups with msd boxes 10 inches away from the s300 and kept dropping. well, my dell finally crashed and i bought a toshiba. call it what you want, but i've never dropped again - even with that car with the msd box 10 inches away from the s300, all those kpro's from the past, never happened since.