ignition lexus LS400 1994 Engine / 1994 LS400: STARTING AND DRIVING

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
11 8
THREE-WAY CATALYTIC
CONVERTER
Three-way
catalytic converter
Vehicles sold in California
Three-way
catalytic converter
Vehicles sold outside California
Three-way catalytic converters are emission control
devices installed in the exhaust system.The three-way catalytic converter located at the confluence of
exhaust pipes looks somewhat like a muffler, but its purpose
is to reduce pollutants in the exhaust gas.
CAUTION:

Keep people and combustible materials away from the
exhaust pipe while the engine is running. The exhaust
gas is very hot.

Do not drive, idle or park your vehicle over anything
that might burn easily such as grass, leaves, paper or
rags.
NOTICE:
A large amount of unburned gas flowing into the
three-way catalytic converter may cause it to overheat
and create a fire hazard. To prevent this and other
damage, observe the following precautions:

Use only unleaded gasoline.

Do not drive with an extremely low fuel level; running
out of gas could cause the engine to misfire, creating
an excessive load on the three-way catalytic
converter.

Do not allow the engine to run at idle speed for more
than 20 minutes.

Avoid racing the engine.

Do not push-start or pull-start your vehicle.

Do not turn off the ignition while the vehicle is
moving.

STARTING AND DRIVING
11 9

Keep your engine in good running order.
Malfunctions in the engine electrical system,
electronic ignition system / distributor ignition
system or fuel system could cause an extremely high
three-way catalytic converter temperature.

If the engine becomes difficult to start or stalls
frequently, take your vehicle in for a check-up as soon
as possible. Remember, your Lexus dealer knows
your vehicle and its three-way catalytic converter
system best.

To ensure that the three-way catalytic converter and
the entire emission control system operate properly,
your vehicle must receive the periodic inspections
required by the Lexus Maintenance Schedule.
ENGINE EXHAUST CAUTION
CAUTION:

Avoid inhaling the engine exhaust. It contains carbon
monoxide, which is a colorless and odorless gas. It can
cause unconsciousness or even death.

Make sure the exhaust system has no holes or loose
connections. The system should be checked from time
to time. If you hit something, or notice a change in the
sound of the exhaust, have the system checked
immediately.
Do not run the engine in a garage or enclosed area
except for the time needed to drive the vehicle in or out.
The exhaust gases cannot escape, making this a
particularly dangerous situation.

Do not remain for a long time in a parked vehicle with
the engine running. If it is unavoidable, however, do so
only in an unconfined area and adjust the heating or
cooling system to force outside air into the vehicle.

Keep the trunk lid closed while driving. An open or
unsealed trunk lid may cause exhaust gases to be
drawn into the vehicle. If you must drive with the trunk
lid open to accommodate a large object, close the
windows, open all the dashboard vents and have the
heating or cooling system deliver fresh air into the
vehicle by turning the fan to high speed with the air
intake control button in the OUTSIDE AIR mode.

To allow proper operation of your vehicle’s ventilation
system, keep the inlet grilles in front of the windshield
clear of snow, leaves, or other obstructions.

If you smell exhaust fumes in the vehicle, drive with the
windows open and the trunk lid closed. Have the cause
immediately located and corrected.

STARTING AND DRIVING
120
BEFORE STARTING THE ENGINE
1. Check the area around the vehicle before entering it.
2. Adjust seat position, seatback angle, headrest height and
steering wheel angle.
3. Adjust inside and outside rear view mirrors.
4. Lock all doors.
5. Fasten seat belts.
Remember to check that the service reminder, indicators
function when turning the key to “ON”, and check the fuel
gauge to see that you have sufficient fuel.
IGNITION SWITCH WITH STEERING
LOCK
“START” − Starter motor on. The key will return to the
“ON” position when released.For starting tips, see page 121.
“ON” − Engine on and all accessories on.
This is the normal driving position.
NOTICE:
Do not leave the key in the “ON” position if the engine is
not running. The battery will discharge and the
electronic ignition system / distributor ignition system
could be damaged.
“ACC” − Accessories such as the radio operate, but the
engine is off.
If you leave the key in the “ACC” or “LOCK” position and open
the driver’s door, a buzzer will remind you to remove the key.
“LOCK” − Engine is off and the steering wheel is locked.
The key can be removed only at this position.
To turn the key from “ACC” to the “LOCK” position, you must
put the transmission selector lever in the “P” position.

STARTING AND DRIVING
With the brake pedal depressed, shift
while pressing the lock release button in
(The ignition switch must be in the “ON” position.)
Shift while pressing the lock
release button in
Shift without pressing
the button
Lock release button
To prevent misshifting
Parking, engine starting
and key removal position
Reverse position
Neutral position
Normal driving position
Position for engine braking
Position for stronger engine braking
than that in “2” position
Overdrive switch
For selecting either a three-speed
or four-speed transmission
ON position
(Shifting into overdrive possible)
OFF position
(Shifting into overdrive not possible)
Shift position indicator
Shows the selector lever position
Shift position is also displayed
on the instrument cluster
Driving pattern selector switch
For selecting a driving pattern suitable
to existing driving conditions
NORMAL position
for general driving
conditions
POWER position
for powerful acceleration
123
AUTOMATIC TRANSMISSION

STARTING AND DRIVING
124Your automatic transmission has a shift lock system to
minimize the possibility of incorrect operation. This means you
can only shift out of “P” position when the brake pedal is
depressed (with the ignition switch in “ON” position and the
lock release button pressed in).
Correct use of the automatic transmission is explained in the
following parts.
(a) Normal driving
(b) Using engine braking
(c) Using the “2” and “L” positions
(d) Backing up
(e) Parking
(f) Good driving practice
(g) If you cannot shift the selector lever out of “P” position
(h) If the “O / D OFF” indicator light flashes
(a) Normal driving
“P” (Park)
position
“N” (Neutral)
position
1. Start the engine as instructed in “How to start the
engine” on page 121.
The transmission must be in “P” or “N”. The engine will not start
in “R”, “2”, “L” or “D” position even if the key is turned to
“START”.
Driving pattern
selector switchIndicator light
Power position
Normal position
2. Set the driving pattern selector switch to the NORMAL
position.
Your transmission has a driving pattern selector switch which
allows you to select either “NORM” or “PWR” to suit your
driving condition. For ordinary driving, Lexus recommends that
you use the NORMAL position to improve fuel economy.
3. For more powerful acceleration and sporty driving, use
the POWER position.
In the POWER position, the “ECT PWR” light in the instrument
cluster is on and the transmission is shifted up at higher vehicle
speeds and shifted down more responsively than in the
NORMAL position.

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
132
The indicator light shows the selector switch is in
“SPORT” position. When the indicator light is not on, this
means the selector switch is in “NORMAL” position.
When you turn the ignition key to the “ON” position, the
indicator lights will come on for two seconds.
HEIGHT CONTROL SYSTEM
(U. S. A. ONLY)
The height control system adjusts the vehicle height. This
adjustment is automatically made in response to the
driving conditions to provide good riding comfort and
stability in all driving conditions.
(a) Vehicle height adjustment
Push the selector switch to select one of the following modes:
“NORMAL” mode − For driving on roads with a normal
surface.
“HIGH” mode − For driving on rough roads which are
unsurfaced or continually bumpy.
To change the mode, push the selector switch.
“NORMAL” mode
The vehicle height remains at normal height at all driving
speeds.

STARTING AND DRIVING
133 “HIGH” mode
The vehicle height switches between the following two vehicle
heights according to the driving conditions:
Vehicle height
Driving condition
NormalHigh-speed driving
HighLow and medium speed driving
The indicator light shows the vehicle height is high.
When you turn the ignition key to the “ON” position, the
indicator light will come on for 2 seconds.
(b) Height control ON / OFF switch
OnOff
This switch is located inside the tool storage section on the left
side of the trunk compartment. Sliding the switch to the OFF
position will turn off the height control system. When the switch
is turned off, the “HI” display plinks.
NOTICE:
Before jacking up, towing or hoisting the vehicle, always
turn the height control ON / OFF switch to OFF. If this is
not done, the vehicle height automatic adjustment
function will operate, causing imbalance of the vehicle
and contact of the bumper, etc. with the road surface.
(c) Malfunction warning
If the “HI” display blinks when the height control ON / OFF
switch is turned on, there is a malfunction in the Lexus ride
control system or height control system.

STARTING AND DRIVING
134If the “HI” display is blinking and you suspect a malfunction,
first check that the height control ON / OFF switch is actually
turned on.
If you then confirm that the switch is blinking in the malfunction
mode, have the system checked by your Lexus dealer at the
first opportunity.
TRACTION CONTROL SYSTEM
The traction control system automatically controls
spinning of the rear wheels which may occur when
accelerating on slippery road surfaces, thus maintaining
vehicle stability and driving power to the rear wheels.
When you turn the ignition switch on, this system always
turns on. Leave the system on during ordinary driving so
that it can operate when needed. When traction control is
applied, the “TRAC” indicator / warning light blinks.
Vehicles without headlight cleaner
Vehicles with headlight cleaner
You can turn off the traction control system by pushing
the “TRAC-OFF-” switch. The “TRAC OFF”
indicator / warning light will then come on. Pushing the
“TRAC-OFF-” switch a second time turns the system back
on and extinguishes the “TRAC OFF” indicator / warning
light.
You may hear a slight clicking noise in the engine compartment
when the engine is started. This means that the traction control
system is in the self-check mode, and does not indicate
malfunction. When the traction control system is operating,
you may feel vibration of your vehicle, caused by operation of
the brakes. This indicates the system is functioning properly.
When getting the vehicle out of mud or new snow, etc. the
traction control system will operate to prevent the wheels from
spinning. Even though the accelerator pedal is fully depressed,
the engine speed will be restrained to a certain level.