TOYOTA 2012 Tacoma - Manual (Page 169)

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2-4. Using other driving systems
Rear differential lock system
∗
Using the rear differential lock system
Automatic transmission
4WD models: Before using the rear differential lock system.
Stop the vehicle, shift the shift lever to N and put the front-
wheel drive control switch in the L4 position to see if this is
sufficient. If this has no effect, additionally use the rear differ-
ential lock system.
Be sure to stop the wheels.
Press the RR DIFF LOCK switch.
After the rear differential is locked, the indicator will come on.
Gently depress the accelerator pedal.
Unlock the rear differential as soon as the vehicle moves.
To unlock the rear differential, push the switch again.
∗
: If equipped
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 differen-
tial.
At this time, the indicator will
blink. Wait a few seconds for
the system to complete opera-
tion. After the rear differential is
locked, the rear differential lock
indicator will stop blinking and
remain on.
To unlock the rear differential,
push the switch again.