Pioneer KEX-900 Service Manual page 2

KeExX-900/KEX-500
1. SECRET CODE
This unit is equipped with a secret code function. The secret code (4-digit)
electronically locks the unit to reduce the danger of theft.
The code is preset to [! [} J [fat the time of purchase, and the unit
can be used normally without altering the code as preset. It is recom-
mended, however, that the user change the code to another value to
take full advantage of the anti-theft properties of this system.
Once a code is set, the unit will operate normally without input of the
secret code, even if the ignition of the vehicle is switched OFF and then
ON again. Should power to the unit be interrupted due to a battery change,
repairs, or theft, however, the unit will fail to operate when power is
restored unless the preset secret code is first entered. Three consecutive
wrang inputs of the code will cause the unit to lock electronically to accept
no input of code for three hours. Once operation is restored, three more
wrong code inputs result in another three hours of electronic lock up.
This feature helps to prevent breaking of the secret code through sequen-
tial or random input.
These features mean that once the power supplied to the unit is com-
pletely cut, further operation is impossible except for those who know
the secret code. This makes the unit unuseabie if stoien, thus reducing
the danger of theft. .
¢ When taking the unit to a service station for repair, be sure to either
tell the service personnel the registered code or return the value to
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* Should you forget your registered secret number, consult your local
service station taking along a such proof of purchase and ownership
as the original receipt, etc.
Registering the Secret Code
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. Switch the ignition key of the vehicle to ON or ACC.
2. Simultaneoulsy press the volume control buttons @ (+) and (~) within
one minute after performing step 1.
3. The message [ {7 -/ © will flash on the display @ to indicate that
secret Code registration is now possible. During this period, the but-
tons illustrated below become numeric input buttons (O—9) for the
purpose of secret code registration.
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0123 4 5 6 7 8 9
4. Use the numeric input buttons to register the 4-digit secret number
of your choice.
Ex. Registration of "8642"
Press:
1. Volume control button (+)
1
2. Music Scan button
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3. Command button 4
4. Command button 2
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Secret Code Registration
The secret code should be registered after all connection and installation
procedures are complete. Perform the procedures outlined in ''Register-
ing the secret code"' within one minute after switching the ignition key
of the vehicle to ON or ACC.
The internal microprocessor will judge that a secret code has not been
set if registration is not begun within one minute, if the mode switch is
pressed during the one-minute period, or if an attempt is made to load
a cassette. At this time, switch the ignition key OFF and then discon-
nect the unit's orange lead from the vehicle's battery. Then reconnect
the lead and atternpt secret code registration again.
Accessory Sticker and Card
© Affix the sticker on a window of the vehicle in which the unit is in-
stalled to inform potential thieves of the anti-theft function of the unit.
* Write the secret code, unit model number, and unit serial number on
the card and store it in a safe place outside of the vehicle itself. The
serial number of this device is located on the bottom of the unit. This
information can then be made available to the police and your PIONEER
service station should your unit be stolen.
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SECAET CODE
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® PIONEER
Dealer Installation
When this unit is installed by the dealer, either inform the dealer of the
desired secret code for presetting or be present during the installation
procedures to set the secret code yourself.
KEX-500
1. Switch the ignition key of the vehicle to ON or ACC.
2. Simultaneoulsy press the volume control buttons @ (+) and (—) within
one minute after performing step 1.
3. The message { {7 ,-/ & will flash on the display @ to indicate that
secret code registration is now possible. During this period, the but-
tons illustrated below become numeric input buttons (O—9) for the
purpose of secret code registration.
0123 4 5 6 7 8 9
4. Use the numeric input buttons to register the 4-digit secret number
of your choice.
Ex. Registration of "8642"
Press:
1. Volume control button (+) cr
2. Music Scan button g8
3. Command button 4 oo 7
4. Command button 2
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