Honda Odyssey 2018 Owner's Manual page 252

uuClimate Control SystemuUsing Automatic Climate Control
■
Synchronization Mode
You can set the temperature synchronously for the front compartment and the rear
passenger compartment in synchronization mode.
1. Press the SYNC button.
u The system switches to synchronization mode.
2. Adjust the temperature using the temperature control switch.
Press the SYNC button to return to dual mode.
250
1Synchronization Mode
When the system is not in synchronization mode, the
temperature for the front compartment and rear
passenger compartment can be set separately.