Power Door Serial Data Line

The power door serial data line does not communicate with the scan tool via the DLC. Power door serial data information is interpreted by the Driver Door Module (DDM) and transmitted on the Class 2 data line by the DDM.

The power door serial data is used for serial data communication between the door modules as well as the Driver Door Window Switch Assembly (DDSA). Refer to Diagnostic System Check - Door Systems in Doors.