2-3. CHASSIS CONTROLS AND INDICATORS (Contd) TM 9-2320-386-10 2-3 Key Item and Function 10 The Electronic Control Unit (ECU) power button is used to turn on the ECU, which controls and monitors CTIS operation. 11 Liquid Crystal Display (LCD) gives operator current tire pressure and maxi- mum speed for terrain setting selected. 12 Four terrain buttons, (Highway, Cross Country, Mud/Sand/Snow, and Emergency.) Represents pre-determined pressure set points (table 2-3). 13 Temperature control knob is pulled out all the way to provide maximum amount of heat to personnel compartment. 14 Defroster knob is pulled out to direct flow of hot air onto windshield to prevent frosting. 15 Front wheel drive lever engages/disengages front wheel drive power. 16 Front wheel drive indicator light indicates front wheel drive is activated. 16 15 14 13 10 11 12