Circuit/System Description
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The left front exterior door handle and right front exterior door handle switch signal circuits provide inputs to the driver door module (DDM) and passenger door module (PDM) when an exterior door handle switch is activated. These inputs allow the door module to detect a door open request. The door modules provide voltage to the door handle switches. If the door module detects that a ground is applied for greater than 30 seconds continuously, a DTC is set and the door module will ignore the door handle switch input.