Keyless Entry Interior Light ANSWERBACK
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
Interior light's answerback operation in response to door lock control by keyless entry system: To allow the driver to confirm the doors have locked by the keyless entry system, the ETACS-ECU causes the interior lights to blink twice when the doors are locked by the RKE system and to illuminate for approximately 30 seconds when the doors are locked. The interior light's answerback operation in response to a keyless entry system control action is accompanied by flashing of the hazard warning lights.