Thanks, now I know where to start looking.

Code 63, the quick answer from my manual is "Tilt lever switch abnormality".
The long answer requires the Toyota analyzer to be connected to the SAS diagnostic port to get the following sub codes:
63-1, Forward and Reverse tilt switches have been on simultaneously.
63-2, Forward tilt switch short circuit for 2 minutes or longer.
63-3, Reverse tilt switch short circuit for 2 minutes or longer.