hi
could be a few things , i.e.
1) rotary coupling
2) Steering wheel switches
3) Check the continuity on steering wheel loom
4) check connections on the pcm module behind the battery
5) brake pedal switch, check rear brake lights are working
does ur radio controls and horn work ok
if u need to remove the steering wheel airbag , u need the hook tool to remove the airbag , not forgetting to disconnect the battery first then wait for 30 x mins before removing airbag
may i ask what diagnostics are u using plse,
hope that helps