According to Honda, if software errors develop, which can happen from something like a low battery or interrupting a learn procedure, it can cause all sorts of electrical problems that can be hard to troubleshoot. Try performing a battery cable reset. A battery cable reset forces all capacitors to discharge faster and clears and resets most control unit volatile memory. Before you start, make sure that the battery is fully charged and obtain the anti-theft code and write down the customer’s audio presets.
Turn the ignition switch to Lock and remove the key. This lessens the chance of voltage spikes.
Disconnect the battery negative cable first, then disconnect the positive cable.
Short the battery cables together with a jumper wire.
Turn the ignition switch to On and wait 10 minutes.
Turn the ignition switch to Lock and remove the key.
Remove the jumper wire and reconnect the battery positive cable first, then the negative cable.
Check ISIS and perform the required reset/learn procedures for the specific vehicle.
Enter the anti-theft code and restore the customer’s settings.