Honda Pilot 2016 Owner's Manual page 214

Synchronized Mode
You can set the temperature synchronously for the driver side, front passenger side
and rear seats in synchronized mode.
1. Press the SYNC button.
u The system will switch to synchronized mode.
2. Adjust the temperature using driver's side temperature control switch.
Press the SYNC button to return to synchronized mode off.
uuClimate Control System
1Synchronized Mode
When you press the button, the system changes
to synchronized mode.
When the system is in synchronized mode off, the
temperature for the driver, front passenger, and rear
seats can be set separately.
* uSynchronized Mode
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