Been having the abs, tc, hdc and srs lights on the dash.
So far have checked the wheel sensors with a dedicated tester, which
cnofirmed all sensors ok, also checked them with an ociloscope.
      The lights all come on at the same time, which leads me to suspect
that as the srs and abs ecu's are seperate, could a duff earth cause this
sort of fault?
      The time period before the lights iluminate is after 1 to 5 miles and
sometimes instantly once the vehicle moves.
      The abs still functions, and brake performance is not affected.
     Any help or advice greatfuly received.