Toyota 2009 Tundra Owner's Manual page 252

2-4. Using other driving systems
CAUTION
n Caution while driving
Never operate the front-wheel drive control switch if the wheels are slipping.
Stop the slipping or spinning before shifting.
When the vehicle is parked
n
If the shift lever is moved before the 4LO indicator turns on/off, the transfer
mode may not be shifted completely. The transfer mode disengages both the
front and rear driveshafts from the powertrain and allows the vehicle to move
regardless of the shift position. (At this time, the indicator blinks and the
buzzer sounds.)
Therefore, the vehicle is free to roll even if the automatic transmission is in P.
You or someone else could be seriously injured. You must complete the
shifting of the transfer mode. (→P. 225)
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