2000 Lexus LS400 key battery

KEYS AND DOORS
18
1Locking the doors and sounding an alarm
2Unlocking the doors
3Indicator light
4Unlocking the trunk lid
NOTE: *This feature can be set inoperative as
vehicle theft deterrent measure in case of the loss ofthe wireless remote control key. Ask your Lexusdealer for details.
When you operate any button on the key, push it slowly
and surely.
The operational range of the wireless remote control is
approximately 1 meter (3 ft.). The effective range may
vary with different conditions. To activate the wireless
remote control without fail, do it approximately 1 meter
(3 ft.) from your Lexus. In the following cases, the battery in the key may be
discharged. If this is a case, replace it using a special
screwdriver.

The remote control does not work.
 The operational range of wireless remote control
becomes extremely short.
 The indicator light on the key is dimmed or does not
come on.
For the replacement of the battery, see ºReplacing the
batteryº on page 27. You can also have the battery of the
key replaced by your Lexus dealer.
If you lose the wireless key, contact your Lexus dealer
as soon as possible to avoid the possibility of theft, or an
accident.
You can use up to 4 wireless remote control keys for the
same vehicle. Contact your Lexus dealer for detailed
information.
The wireless remote control key is an electronic
component. Observe the following instructions in
order not to cause damage to the key.
 Do not leave the wireless remote control key on
places where the temperature becomes high such as
on the dashboard.
 Do not disassemble it.
 Avoid knocking it hard against other objects or

KEYS AND DOORS
27
Replacing the battery
When you replace the battery, prepare a lithium battery
CR1616 and a special screwdriver.
CAUTION
Special care should be taken that small children do not
swallow the removed battery or components.
NOTICE
When replacing the battery, be careful not to lose thecomponents, screws and O±ring.
11L028±1
1. Remove the screw, and then the cover while pushing
it in the arrow direction.

KEYS AND DOORS
28
11L029±1
2. Remove the module from the key frame.
11L030±1
3. Remove the 2 screws to take out the lid of the module.
4. Take out the discharged battery and put a new battery
with the positive side up.

KEYS AND DOORS
29
NOTICE
Make sure the positive side and negative sideof the battery should be faced correctly.
Be careful not to bend the electrode of thebattery insertion and that dust or oils do notadhere to the inside of the module.
Take care not to lose the screws and O±ring.
5. Install the lid with the 2 screws.
NOTICE
Take care not to damage or bend the O±ring wheninstalling.
6. Install the module into the key frame and secure the
cover with the screw.
7. When pushing any switch on the wireless key, make
sure the indicator light comes on.
DOORS
Locking with key

SWITCHES
38When the headlights come on, the lights automatically
turn off about 30 seconds after any of the doors is
opened and closed with the ignition key turned to the
ºACCº or ºLOCKº position.* To turn them on again, turn
the ignition key to the ºONº position, or turn the headlight
switch off
and then twist the knob until the first or second
clickstop. If you are going to park for over one week,
make sure the headlight switch is off.
When the headlight switch is on with all the doors locked
and the trunk closed, pushing the ºLOCKº button on the
wireless remote control key turns off the headlights.
NOTE: *The time before turning off the lights can be changed. Ask your Lexus dealer for details.
Daytime Running Light System
The headlights turn on at reduced intensity when the
parking brake is released with the engine started, even
with the light switch in the ºOFFº position. They will not
go off until the ignition switch is turned off.
To turn on the other exterior lights and instrument panel
lights, twist the knob to the first clickstop.
Twist the knob to the second clickstop to turn on the
headlights to full intensity for driving at night. When setting the knob to the third clickstop (ºAUTOº),
the headlights will automatically adjust to full intensity
and/or turn on the other lights depending on the
darkness of the surroundings. Likewise, as the
surroundings be
come brighter, the headlights will turn to
reduced intensity, ultimately turning off the other lights.
NOTICE
To prevent the battery from being discharged, do not leave the lights on longer than necessarywhen the engine is not running.
Automatic headlight leveling system
(Vehicles with discharge headlight only)
As the headlight beam level is always maintained
automatically at the proper level in all loading conditions,
your headlights do not dazzle other road users.
If this system fails, the multi information display shows
a message ºHEADLIGHT LEVELINGº. If this occurs,
have your vehicle checked by Lexus dealer. See page
79 for additional information.

SWITCHES
53
To turn on the emergency flashers, push the switch.
All the turn signal lights will flash. The emergency
flashers
will work with the engine running or off and with
or without the ignition key.
Turn on the emergency flashers to warn other drivers if
you must stop your vehicle where it might be a traffic
hazard.
Always pull your vehicle as far off the road as possible.
The turn signal light switch will not work when the
emergency flashers are in operation.
NOTICE
To prevent the battery from being discharged, do not leave the switch on longer than necessarywhen the engine is not running.
SEAT HEATER SWITCHES
12L013b

GAUGES, METERS AND SERVICE REMINDER INDICATORS
67
(e) Discharge Warning Light
This light warns that the battery is being discharged.
If it comes on while you are driving, stop the vehicle, turn
off the engine, and check for the cause. Look first at the
engine drive belt.
If it is loose or broken, the generator will not charge
the battery properly.
 If the belt is O.K., there is a problem somewhere in the
charging system.
The engine ignition will continue to operate, however,
until the battery is discharged. Turn off the air
conditioning, blower, radio, etc., and drive directly to the
nearest Lexus dealer or repair shop.
NOTICE
Do not continue driving if the engine drive belt is broken or loose.
(f) Malfunction Indicator Lamp
This lamp comes on in the following cases.
a. The fuel tank is completely empty. (See ºFuel gaugeº
on page 57 for instructions.)
b. The fuel tank cap is not tightened securely. (See
ºFuel tank capº on page 114 for instructions.)
c. There is a problem somewhere in your engine
electrical system, automatic transmission electrical
system or electronic throttle control system.
If it comes on while you are driving in case ªc.º, have your
vehicle checked/repaired by your Lexus dealer as soon
as possible.
If this lamp comes on and the engine speed does not
increase with the accelerator pedal depressed down to
about the middle position, there may be a problem
somewhere in your electronic throttle control system.
At this time, if you depress the accelerator pedal more
firmly and slowly, you can drive your vehicle at low
speeds. Have your Lexus checked by your Lexus dealer
as soon as possible.
Even if the abnormality of the electronic throttle control
system is corrected during low speed driving, the system
may not be recovered until the engine is stopped and the
ignition key is turned to ªACCº or ªLOCKº position.

INTERIOR EQUIPMENT
93
The power outlet is designed for power supply for
car accessories.
The ignition key must be in the ºACCº or ºONº position
for the power outlet to be used.
NOTICE
To prevent the fuse from being blown, do not
use the electricity over the total vehiclecapacity of 3.5A/12V.
To prevent the battery from being discharged,do not use the power outlet longer thannecessary when the engine is not running.
Close the power outlet lid when the poweroutlet is not in use. Inserting a foreign objectother than the appropriate plug that fits theoutlet, or allowing any liquid into the outlet maycause electrical failure or short circuits.