Circuit/System Description
The front door power window motors communicate with the driver door module (DDM) and passenger door module (PDM) via serial data. The
motors contain a logic module which must be normalized or programmed any time the window motor is serviced to provide proper operation and
communication between door modules and window motors.
Conditions for Running the DTC
Power window switch activated.
Conditions for Setting the DTC
B320A 39
An internal malfunction or a momentary voltage spike has been detected by the DDM or PDM in the front power window motor while commanding
the window UP/DOWN.
B320A 42
A not normalized/programmed driver or front passenger door power window motor.
B320A 4B
The front window motor experiences a loss of voltage in the B+ circuit or an open/high resistance in the serial data circuit.
Action Taken When the DTC Sets
The affected power window will malfunction.
Conditions for Clearing the DTC
