As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAXI, THE CREW OBSERVED THE WING ANTI-ICE FAIL LIGHT CAME ON WITH THE ENGINE ANTI-ICE SELECTED ON. THE AIRCRAFT RETURNED TO THE GATE. MAINT PERFORMED THE CONTROL UNIT BITE TEST. THE OPERATIONAL TEST WAS CARRIED OUT IAW MM 30-11-00 WITH NO FAULT FOUND. THE AIRCRAFT WAS DISPATCHED AND FURTHER PROBLEM DURING SUBSEQUENT FLIGHT.