Brake Assist System; Drum−In−Disc Type Parking Brake System - Toyota 2007 Tundra Owner's Manual

07 04.26
If either of the following conditions oc-
curs, this indicates a malfunction some-
where in the components monitored by
the warning light system. Contact your
Toyota dealer as soon as possible to
service the vehicle.
D
The light does not come on when the
ignition switch is turned to the "ON"
position, or remains on.
D
The light comes on while you are dri-
ving.
A warning light turning on briefly during
operation does not indicate a problem.
CAUTION
If the "ABS" warning light remains on
together with the brake system warn-
ing light, immediately stop your ve-
hicle at a safe place and contact your
Toyota dealer.
In this case, not only the anti−lock
brake system will fail but also the
vehicle will become extremely unsta-
ble during braking.
DRUM−IN−DISC TYPE PARKING BRAKE
SYSTEM
Your vehicle has a drum−in−disc type
parking brake system. This type of brake
system needs burnishing of the brake
shoes periodically or whenever the parking
brake shoes and/or drums are replaced.
Have your Toyota dealer perform the bur-
nishing.
2007 TUNDRA from Jul. '07 Prod. (OM34463U)

BRAKE ASSIST SYSTEM

When you slam the brakes on, the
brake assist system judges as an emer-
gency stop and provides more powerful
braking for a driver who cannot hold
down the brake pedal firmly.
When you slam the brakes on, more pow-
erful 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 mal-
function.
The brake assist system becomes opera-
tive 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).
For an explanation of this system's warn-
ing light, see "Service reminder indicators
and warning buzzers" on page 197 in Sec-
tion 1−6.
447