2004 Toyota Tundra Owners Manual - Page 180

'04 TUNDRA_U (L/O 0309) "VSC TRAC" warning light This light warns that there is a problem somewhere in the following. D "AUTO LSD" system D Traction control system D Vehicle stability control system When the system is normal and the ignition key is turned to "ON", the warning light will come on and will go off after a few seconds. Type A If the system continues to operate, the buzzer sound changes from intermittent to continuous. (The continuous buzzer sounds for about 3 seconds.) At the time the "VSC TRAC" warning light will come on and the "AUTO LSD" system temporarily stops operating in order to protect the brake actuator. (Although the "AUTO LSD" system does not operate, it is no problem to continue driving.) The system will be automatically restored after a short time and the "VSC TRAC" warning light goes off. If the light comes on while driving, the "AUTO LSD" 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: 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. The brake actuator temperature increases during continuous operation of the above mentioned systems such as on slippery roads. If the brake actuator temperature becomes too high while any of the systems is operating, a buzzer will start to sound intermittently to indicate that the "AUTO LSD" system can no longer operate. In this case, immediately stop your vehicle at a safe place. D The warning light does not come on after the ignition key is turned to "ON". D The warning light remains on after the ignition key is turned to "ON". D The warning light comes on while driving. Type B 180 2004 TUNDRA from Sep. '03 Prod. (OM34426U)