As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A STAB TRIM AND MACH TRIM CAUTION MESSAGE ON TAKEOFF ROLL. CREW ABORTED TAKEOFF AND RETURNED TO THE GATE WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE PITCH TRIM DISCONNECT SWITCH IN ACCORDANCE WITH THE AIRCRAFT MAINTENANCE MANUAL 27-41-30-000(400)-801. AIRCRAFT WAS RELEASED FOR SERVICE.