I have an 08. The switch is the turn knob from 2wd-Auto-4HI-4LO. Normal operation on auto, the system depicts 4 wheels highlighted and the center diff with no lights avatar. When the actual 4WD light kicks on (left side of instrument cluster), the 4 wheel system avatar goes away and then vice versa. I looked this up on the manual and it says the 4WD might have a problem but I don't feel anything wrong. When I turn on 4 HI or 4LO, it engages with no issues, it's only on auto.