Rear Driveline Module (RDM) Operation

WARNING: This page is about a different car, the 2018 Fiat 500X. However, it is still accessible from the selected car via links, so may be relevant.

Rear Driveline Module (RDM) operation diagnosis. Refer to the following chart:

CONDITION	POSSIBLE CAUSES	CORRECTION
No All Wheel Drive (AWD) in forward or reverse directions, propeller shaft turning.	Check Torque Vectoring Module (TVM) for Diagnostic Trouble Codes (DTC's).	Review TVM diagnostic service information.
	RDM failure.	Diagnose and repair or replace as necessary.
No AWD in forward or reverse directions, propeller shaft not turning.	Check TVM for DTC's.	Review TVM diagnostic service information.
	Transfer case component failure.	Diagnose and repair or replace as necessary.
Vibration at all speeds, continuous torque transfer.	Mis-matched tires, worn tires on front axle.	Replace worn or incorrect (mis-matched) tires with same make and size.