2003 Toyota 4Runner Owners Manual - Page 882

'03 4Runner_U (L/O 0301) The slip indicator light and downhill assist control system indicator light come on for a few seconds when the ignition key is turned to "ON". If any of the indicator lights does not come on when the ignition is turned on, contact your Toyota dealer. If the system is used frequently, the brake actuator temperature may become too high and a buzzer will sound intermittently. If this happens, the downhill assist control system indicator light will flash and a buzzer will sound intermittently. When the temperature of the brake actuator goes down, the system will begin to operate again. Until it restarts, the active traction control system and hill-start assist control system will not operate; however, the conventional brake can be operated. "VSC TRAC" warning light 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. It is not a malfunction that the warning light may stay on for 60 seconds after the ignition key is turned to the "ON" position. 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 system on such as 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 downhill assist control system can no longer operate. In this case, stop your vehicle immediately at a safe place. If the system continues to operate, the buzzer sound changes from intermittent to continuous. (The continuous buzzer sounds for about 3 seconds.) If there is any abnormality in the system, the "VSC TRAC" warning light will come on. When the "DAC" switch is pushed, the downhill assist control system indicator light also flash. If the "VSC TRAC" warning light comes on, there may be an abnormality in any of the following systems in addition to the downhill assist control system. D Hill-start assist control system D Active traction control system D Vehicle skid control system 152 2003 4RUNNER from JAN. '03 Prod. (OM35806U)