1994 Lexus LS400 cruise control

SECTION 3 – 1
11 7
STARTING AND DRIVING
Starting and driving
Three-way catalytic converter11 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution
11 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before starting the engine120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition switch with steering lock120 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake121 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine121 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission123 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control128 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lexus ride control system131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Height control system132 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction control system134 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system135 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of tires137 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING AND DRIVING
128
(f) Good driving practice

If the transmission repeatedly upshifts and downshifts
between the third and overdrive gears when climbing a
gentle slope, it is suggested that the overdrive switch be
turned off. Be sure to turn the switch on immediately
afterward.

When towing a trailer, in order to maintain efficient engine
braking and electrical charging performance, do not use
overdrive.
CAUTION:
Always keep your foot on the brake pedal while stopped
with the engine running. This prevents the vehicle from
creeping.
NOTICE:
Do not hold the vehicle on an upgrade with the
accelerator pedal. This can cause the transmission to
overheat. Always use the brake pedal or parking brake.
(g) If you cannot shift the selector lever out
of “P” position
If you cannot shift the selector lever from “P” position even
though the brake pedal is depressed, use the shift lock
override button. For instructions, see “If you cannot shift
automatic transmission selector lever” on page 163.
(h) If the “O / D OFF” indicator light flashes
If the “O / D OFF” indicator light flashes, contact your Lexus
dealer as soon as possible. There may be trouble in the
transmission system.
CRUISE CONTROL
The cruise control allows you to cruise the vehicle at a
desired speed over 40 km / h (25 mph) with your foot off the
accelerator pedal.
Your cruising speed can be maintained although a slight speed
change may occur when driving up or down a gradient, within
the limits of engine performance. On steeper hills, a greater
speed change will occur so it is better to drive without the cruise
control.
When the cruise control is on, the driving pattern of the
automatic transmission is fixed in the normal position,
regardless of the position of the selector switch.
CAUTION:

To help maintain maximum control of your vehicle, do
not use the cruise control when driving in heavy or
varying traffic, or on slippery (rainy, icy or
snow-covered) or winding roads.

Avoid vehicle speed increases when driving downhill.
Use engine braking by downshifting the transmission.

STARTING AND DRIVING
129
Turning on the system
To operate the cruise control, push the main switch. This turns
the system on. The indicator light in the instrument cluster
shows that you can now set your desired cruising speed.
Another push on the switch will turn the system completely off.
When the ignition key is turned off, the main switch is also
automatically turned off. To use the cruise control again, push
the main switch again to turn it on.
CAUTION:
To avoid accidental cruise control engagement, keep the
main switch off when not using the cruise control.
Setting at a desired speed
Bring the vehicle to the desired speed, press the control lever
downward in the “SET / COAST” direction and release it. This
sets the vehicle at that speed. Now you may take your foot off
the accelerator pedal. If you need acceleration − for example,
when passing − depress the accelerator pedal enough for the
vehicle to exceed the set speed. When you release the
accelerator, the vehicle will return to the speed set prior to the
acceleration.
Cancelling the preset speed
You can cancel the preset speed by either of the following:
a. Pulling the control lever in the “CANCEL” direction.
b. Depressing the brake pedal.

STARTING AND DRIVING
130If the vehicle speed falls below 40 km / h (25 mph), the preset
speed will automatically cancel out.
If the vehicle speed drops 16 km / h (10 mph) below the preset
speed, the preset speed will also automatically cancel out.
If the preset speed automatically cancels out for other than
these reasons, have your vehicle checked by your Lexus
dealer at the earliest opportunity.
Resetting to a faster speed
Press the control lever upward in the “RES / ACC” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held upward, the vehicle will gradually gain
speed.
When the difference between the actual vehicle speed and the
set speed is less than 5 km / h (3 mph), the set speed can be
increased 1.6 km / h (1 mph) each time by pressing the control
lever upward in the “RES / ACC” direction quickly within 0.6
seconds.
However, a quicker way to reset is to accelerate the vehicle
and then press the control lever downward in the
“SET / COAST” direction.
Resetting to a slower speed
Press the control lever downward in the “SET / COAST”
direction and hold it. Release the lever when the desired speed
is attained. While the lever is held downward, the vehicle
speed will gradually decrease.When the difference between the actual vehicle speed and the
set speed is less than 5 km / h (3 mph), the set speed can be
lowered 1.6 km / h (1 mph) each time by pressing the control
lever downward in the “SET / COAST” direction quickly within
0.6 seconds.
However, a quicker way to reset is to depress the brake pedal
and then press the control lever downward in the
“SET / COAST” direction.
Resuming the preset speed
Press the control lever upward in the “RES / ACC” direction.
The vehicle will resume the speed set prior to cancellation
unless it is caused by the vehicle slowing down to less than 40
km / h (25 mph) or to a speed 16 km / h (10 mph) below the
preset speed.
Cruise control failure warning
If the “CRUISE” indicator light in the instrument cluster flashes
five times and then goes out when using the cruise control, it
means that there is trouble in the cruise control system.
Contact your Lexus dealer.