Battery Terminal Disconnection and Reconnection: Disconnection

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Some systems store data in memory that is lost when the battery is disconnected. Do the following steps before disconnecting the battery.

Make sure you have the anti-theft code(s) for the audio and/or the navigation system (if equipped).
Write down the audio the presets (AM and FM), and the XM audio presets (if equipped), because the audio unit dose not retain the presets after the battery is disconnected.
Make sure the ignition switch is in LOCK (0).
Disconnect and isolate the negative cable from the battery.
NOTE: Always disconnect the negative cable from the battery first.
Disconnect the positive cable from the battery.