2006 Lexus GS 430 Owners Manual - Page 455
2006 Lexus GS 430 Manual
Page 455 highlights
STARTING AND DRIVING Drum−in−disc type parking brake system Your vehicle has a drum−in−disc type parking brake system. This type of brake system needs bedding−down of the brake shoes periodically or whenever the parking brake shoes and/or drums are replaced. Have your Lexus dealer perform the bedding−down. BRAKE PAD WEAR LIMIT INDICATORS Brake assist system When you slam the brakes on, the brake assist system judges as an emergency stop and provides more powerful braking for a driver who cannot hold down the brake pedal firmly. When you slam the brakes on, more powerful braking will be applied. At this time, you may hear a sound in the engine compartment and feel the vibrations of the brake pedal. This does not indicate a malfunction. The brake assist system becomes operative after the vehicle has accelerated to a speed in excess of approximately 10 km/h (6 mph). It stops operating when the vehicle decelerates to a speed below approximately 5 km/h (3 mph). The brake assist system may not work for about 60 seconds after the engine is started. For an explanation of this system's warning light, see "ABS" warning light on page 78 or 430. G31006 The brake pad wear limit indicators on your disc brakes give a warning noise when the brake pads are worn to the extent that replacement is required. If you hear a squealing or scraping noise while driving, have the brake pads checked and replaced by your Lexus dealer as soon as possible. Expensive rotor damage can result if the pads are not replaced when needed. GS430 front brake only- The high brake performance is achieved by proper wear of brake pads and discs. As a result, the brake discs may wear earlier than the ones on the conventional brake system. When brake pads are replaced, brake disc thickness is required to be measured. It is dangerous to continue driving when brake pads and discs have exceeded the wear limit. 431