Husqvarna 2009 TE 310 Workshop Manual page 366

"KIT" ASSEMBLING INSTRUCTIONS
NOTES
- When turn the ignition key in position IGNITION, for the first 2 seconds, the
instrument shows the version of the checking SW; after the check, the instrument
shows ALWAYS the map SEL 1.
The switching to SEL 2 is possible with ENGINE ON, pushing the "dual
mode" button for 1 second, with a water temperature of approx. 40 ° C / 104
° F and approx. 10 seconds after the engine start. In the absence of these
conditions, the switching will not be made. From SEL 2, pushing the "dual
mode" button for 1 second, SEL 1 is selected again, and so on.
SEL 1: MAP FOR DRY GROUND
SEL 2: MAP FOR WET GROUND
SEL 1 SEL 2 SEL 1 SEL 2 ...
O.34 Part. N. 8000 H0368 (09-2008)