1998 Lexus LS 400 Owners Manual - Page 252

STARTING AND DRIVING VEHICLE SKID CONTROL SYSTEM The vehicle skid control system helps to provide comprehensive control of the systems such as an anti-lock brake system, traction control, engine control, electronically modulated air suspension, etc. This system automatically controls the output of the brakes or engine to help prevent the vehicle from skidding when cornering on a slippery road surface or abrupt steering wheel operation occurs. 31L052-1 "Slip indicator light If the vehicle is going to skid during driving, the slip indicator light flashes and an alarm sounds. The vehicle skid control activates when the vehicle speed is about more than 15 km/h (9 mph). Depressing the brake pedal repeatedly causes a small noise from the engine compartment. This is a pump pulsating sound of the brake system and it is not a malfunction. You may hear a slight clicking noise in the engine compartment for a few seconds when the engine is started or just after the vehicle is started. This means that the vehicle skid control is in the self-check mode and does not indicate a malfunction. 252