To reset the anti-theft security system on a 2003 Acura, first ensure that all doors are closed and then insert the key into the ignition. Turn the key to the "On" position without starting the engine, and leave it in that position for about 10 minutes. After this, turn the key back to the "Off" position, then turn it back to "On" again for another 10 minutes. Finally, turn the key to "Off" and then start the engine to complete the reset process.
Radio codes of Acura Tl vehicles are part of a standard anti-theft system. To the reset the system just unplug the battery from the car for at least five seconds.
The factory security system is reset by unlocking the doors with a key or remote.
Reset anti theft system
To reset the anti-theft sound system on a 2003 Acura MDX, first, turn the ignition key to the "ON" position without starting the engine. Then, press and hold the "Radio" power button until the display shows "CODE" or "SECURITY." Enter the radio code using the preset buttons; if entered correctly, the radio should unlock. If you don't have the code, check the owner's manual or contact a dealer for assistance.
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Remove the Anti-theft system fuse.
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Hit the reset button.
If the key for the Pontiac has a security chip in it as well, simply wait about fifteen minutes without doing anything and then your car should start. If the key does not have a security chip you may have to remove the battery to reset the system.