Pioneer SGX-CA600 User Manual page 227

Each press of the [Confirm] button moves the cursor to the next digit
place down.
If you press the [Confirm] button after the cursor has been moved to the
ones place, the numerical value is confirmed and the previous screen
reappears.
8
Turn the crankset of the bike at least three times to start the
left and right transmitters.
Once the transmitters are started, connect them with the device within 5
minutes.
9
Use the [←]/[→] buttons to select the mode to which to
change and then press the [Confirm] button.
A sensor search starts. The search may take longer than one minute.
227