2004 Toyota Tundra Owners Manual - Page 177

'04 TUNDRA_U (L/O 0309) Leave the system on during the ordinary driving so that it can operate when needed. You may hear a sound in the engine compartment for a few seconds when the engine is started or just after the vehicle begins to move. This means that the traction control system is in the self −check mode, but does not indicate a malfunction. When the traction control system is operating, the following conditions occur: "VSC TRAC" warning light This light warns that there is a problem somewhere in the following. 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 warning light will come on and will go off after a few seconds. Type A D The system controls the spinning of the rear wheels (two−wheel drive models) or 4 wheels (four −wheel drive models). At this time, the slip indicator light blinks. 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 traction control system can no longer operate. In this case, immediately stop your vehicle at a safe place. D You may feel vibration or noise in your vehicle, caused by operation of the brakes. This indicates the system is functioning properly. The slip indicator light comes on for a few seconds when the ignition key is turned to "ON". If the indicator light does not come on when the ignition is turned on, contact your Toyota dealer. Type B 177 2004 TUNDRA from Sep. '03 Prod. (OM34426U)