Rear Drive Unit (RDU) Operation
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Driveline module operation requires a relatively straight-forward diagnosis. Refer to the following chart:
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| No All Wheel Drive (AWD) in forward or reverse directions, propeller shaft turning. | 1. Check Drivetrain Control Module (DTCM) for DTC's. | 1. Review DTCM diagnostic article. |
| 2. Power Transfer Unit (PTU) failure. | 2. Replace the PTU assembly. | |
| No AWD in forward or reverse directions, propeller shaft not turning. | 1. Check DTCM for DTC's. | 1. Review DTCM diagnostic article. |
| 2. Differential, RDU component failure. | 2. Diagnose and repair or replace as necessary. | |
| Vibration at all speeds, continuous torque transfer. | 1. Mis-matched tires, worn tires on front axle. | 1. Replace worn or incorrect (mis-matched) tires with same make and size. |