CHT\EGT hi temp

[cordonecj]

Hello, I have an EMS installed on LYC IO 540 engine, the problem is all 12 sensors shown the same, 285/300 *F, with 80 *F ambient temp. engine off.....
All other sensors are ok. If I disconect any probe it display -99 *F.
I have EFIS D10A too and can't interconect with EMS by DSBA.
Can the unit have a problem?
Thank you.

 

[dynonsupport]

There is likely something in your 37 pin connector that is connected to something it shouldn't be connected to. If you can connect just power and ground on the 37 pin connector, and keep the CHT/EGT harness connected, and the EGTs go back to normal, then you'll need to start searching your harnesses.