See also:

4-Wheel AHC (Active Height Control Suspension)
4-Wheel AHC adjusts the vehicle height in accordance with driving conditions. To select a height mode, shift the height select switch forward or backward. HI (high mode): For driving bumpy road ...

Abbreviation list
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Overview button and guidance screen
*: Press and hold the “PWR·VOL” knob for 3 seconds or more to turn off the screen and restart the navigation system. Do this when the vehicle-mounted device response is extremely slow. ...