1994 Lexus LS400 lexus LS400 1994 Engine / 1994 LS400: AIR CONDITIONING AND AUDIO

AIR CONDITIONING AND AUDIO
111
Anti-theft system
To deter theft of your radio, the system is designed so that
the radio unit becomes inoperable if it is stolen from the
vehicle.
The system is not preset at the factory. You must input a
three-digit identification number decided by you.
NOTICE:
If you pushed any wrong buttons on the anti-theft
system, the following messages will appear on the
display.

“Err” −You have pushed wrong buttons.

“1-9” −Indicates the number of errors you have
made. You may make up to nine errors, but
no more!

“HELP”−The number of errors you can make was
exceeded. The audio system is completely
inoperable. Contact your Lexus dealer.
(a) Setting the anti-theft system
1. Make sure the radio unit is turned off with the ignition switch
in “ACC”.
2. While holding the (1) and (6) buttons in, push and
hold the “PWR.VOL” knob in until “SEC” appears on the
display.
Tape operation
indicator display
3. Press the (1) button while holding upper side of the (TUNE SEEK) button in. “− − −” and the tape operation
indicator will appear on the display.

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11 2
4. Input your iden tification number by pressing buttons (1), (2) and (3) the desired number of times. Use the (1) button or the first digit, the (2) button for the
second digit and the (3) button for the last digit. For
example, if your number is 345, press the (1) button four
times, the (2) button five times and the (3)
button six times. (pressing once will display “0”.) If the display
returns to “− − −” while inputting, try again.
We recommend that your identification number be associated
with something easy to remember. In case you are unsure of
the number, write it in a notebook you normally carry. Do not
leave it in your vehicle.
Error times (1-9)
5. With your identification number appearing on the display,
press the (SCAN) button and hold it in until “SEC”
appears on the display. “SEC” will go off to indicate the system
is set. If invalid buttons have been used, “Err” will appear on the
display before “SEC” appears. Try again from step 3.

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11 3
Indicator light
Once the system is set, the indicator light turns on and off with
the ignition switch in “OFF” and “SEC” will appear each time
the key is turned to the “ACC” position.
To change the identification number for some reason, cancel
the system (See “(b) Cancelling the anti-theft system”.) and set
it again with a new number.
The system will be activated if the electrical power source is
disconnected from the radio unit. When the system is
activated, the audio system cannot be turned on even after the
power supply resumes and “SEC” will appear on the display.
If this happens, such as when the battery is discharged, see
“(c) If the anti-theft system is activated”.(b) Cancelling the anti-theft system
1. Follow steps 1 to 4 described in “(a) Setting the anti-theft
system”.
2. With your identification number appearing on the display,
press the (SCAN) button and hold it in until “− − −” appears
on the display. “− − −” will go off to indicate the system is
cancelled. If invalid buttons have been used. “Err” will appear
on the display and “SEC” appears. Try again from step 3 in “(a)
Setting the anti-theft system”.
The number displayed with “Err” indicates how many errors
you have made. You may make up to nine errors, but no more!

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Indicator light
NOTICE:
A tenth error will activate the anti-theft system and
“HELP” will appear on the display. The audio system will
be completely inoperable. At this time, the indicator light
also comes on. If this occurs, contact your Lexus dealer.
At the time of resale of your vehicle, cancel the system for the
new owner.(c) If the anti-theft system is activated
Error times (1-9)
The audio system made inoperable by the activated anti-theft
system will be operable if you give it the correct identification
number.
1. Follow steps 3 and 4 described in “(a) Setting the anti-theft
system”.
2. With your identification number appearing on the display,
press the (SCAN) button and hold it in until “SEC” appears
on the display, “SEC” will go off to indicate that the system is
reset and the audio system is operable. If invalid buttons have
been used. “Err” will appear on the display before “SEC”
appears. Try again from the beginning.
See “(b) Cancelling the anti-theft system” for notes on the
number displayed with “Err”.

AIR CONDITIONING AND AUDIO
11 5 The number displayed with “Err” indicates how many errors
you have made. You may make up to nine errors, but no more!
Indicator light
NOTICE:
A tenth error will activate the anti-theft system and
“HELP” will appear on the display. The audio system will
be completely inoperable. At this time, the indicator light
also comes on. If this occurs, contact your Lexus dealer.