Technical Description (Comment)
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.
The ETACS-ECU calculates the intermittent wiper interval from the following input signals, and sends a signal to the front-ECU through the SWS communication line.
If the signal is defective, the front-ECU will ignore the signal and set the intermittent wiper interval to four seconds.