2005 Toyota Tundra Owners Manual - Page 699

'05 TUNDRA_U (L/O 0504) "AUTO LSD" system "VSC TRAC" warning light This light warns that there is a problem somewhere in the following. In the following cases, contact your Toyota dealer: D The warning light does not come on after the ignition key is turned to "ON". D Traction control system D Vehicle stability control system D "AUTO LSD" system When the system is normal and the ignition key is turned to "ON", the light will come on and will go off after a few seconds. It is not a malfunction that the warning light may stay on for 60 seconds after the ignition key is turned to "ON". Depressing the brake pedal repeatedly may turn on the light. It is normal if it goes out after a few seconds. If the "VSC TRAC" warning light and slip indicator light comes on while driving, the traction control system does not work. However, as the brakes operate normally when applied, it is no problem to continue your driving. D The warning light remains on after the ignition key is turned to "ON". D The warning light comes on while driving. The "AUTO LSD" system aids traction by using the traction control system to control engine performance and braking when one of the rear wheels begins to spin. This system is used only when wheel spinning occurs in a ditch or rough surface. This system is effective in case one of the rear wheels is spinning. 193 2005 TUNDRA from Apr. '05 Prod. (OM34440U)