The automatic dimming inside mirror has a front-facing lux level sensor (A), rear-facing lux level sensor (B), and a control unit. The control unit receives signals from each sensor. Based on the difference between the two lux levels (the light outside the vehicle and the light from the headlights of the other vehicle, etc.), the control unit controls the electro-chromic gel to reduce glare. This dimming function is canceled when the transmission is in reverse and the indicator (C) goes off.  | 
Honda Odyssey Service Manual > Doors: Sliding Door Assembly
   Sliding Door Position Adjustment NOTE: If equipped, make sure to disable the power sliding door by turning the power sliding door main switch off. Place the vehicle on a firm, level surface when adjusting the doors. Remove the bolts (A), and remove both female guides (B) from the body. BA6 x 1.0 mm7 ...