2004 Toyota Tacoma Owners Manual - Page 150

'04 Tacoma U (L/O 0309) Rear differential lock system Depressing the brake pedal repeatedly may turn on the light. It is normal if they go out after a few seconds. If the light comes on while driving, the vehicle stability control system does not work. However, as the brakes operate normally when applied, it is no problem to continue your driving. In the following cases, contact your Toyota dealer: D The warning light does not come on after the ignition key is turned to "ON". "VSC TRAC" warning light This light warns that when there is a problem somewhere in the following. D The warning light remains on after the ignition key is turned to "ON". D The warning light comes on while driving. D Vehicle stability control system D Traction control system D "AUTO LSD" system The light will come on when the ignition key is turned to "ON", and will go off after about a few seconds. The light may come on for 60 seconds after the ignition key is turned to "ON". It is normal if they go out after a while. The rear differential lock system is provided for use only when wheel spinning occurs in a ditch or on a slippery or ragged surface. This differential lock system is effective in case one of the rear wheels is spinning. Except for Pre Runner models- Before using the rear differential lock system, first shift the front drive control into "L4" to see if it works. If this has no effect, additionally use the rear differential lock system. 150 2004 TACOMA from Sep. '03 Prod. (OM35814U)