2009 Toyota 4Runner Owners Manual - Page 208

2 -4 . U sing ot he r driving syst e m s Re a r diffe re nt ia l lock syst e m (if e quippe d) The rear differential lock system is provided for use only when wheel spinning occurs in a ditch or on a slippery or rugged surface. The rear differential lock system is effective in case one of the rear wheels is spinning. Press the RR DIFF LOCK switch to lock the rear differential. At this time, the rear differential lock indicator will blink. Wait a few seconds for the system to complete operation. After the rear differential is locked, the indicator will stop blinking and remain on. To unlock the rear differential, push the switch again. Using the rear differential lock system Before using the rear differential lock system. Stop the vehicle, shift the shift lever to N and turn the fourwheel drive control switch to the L4 position to see if this is sufficient. If this has no effect, additionally use the rear differential lock system. Be sure to stop the wheels. Press the RR DIFF LOCK switch. After the rear differential is locked, the rear differential lock indicator will come on. 184