Symptom Chart Electronic Limited Slip Differential (ELSD) System
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| The DCMR does not respond to the scan tool | Wiring, terminals or connectors of DCMR Scan tool DLC DCMR |
No communication with the DCMR REFER to: Communications Network . |
| Vehicle has no or inadequate torque at rear wheels | Wiring, terminals or connectors of DCMR Fuse(s)eLSD HCU Failure DCMR Failure |
CHECK the DCMR, PCM or TCM for DTCs, RESOLVE them first. If inadequate torque at the rear wheels is still present, using a diagnostic scan tool PERFORM the eLSD service routine. |
| Vehicle binds in a turn or resists turning/pulsates | Wiring, terminals or connectors of DCMR.eLSD is mechanically stuck locked. Binding is from 4x4 system. |
Verify axle is binding, disengage 4x4, using a diagnostic scan tool PERFORM the eLSD service routine. Raise the vehicle on a hoist. REFER to: Jacking and Lifting . While holding one rear wheel stationary, attempt to rotate the other rear wheel. If there is a mechanical failure the wheel won't rotate. REFER to: Differential Carrier - Vehicles With: Electronic Limited-Slip Differential . |
| The electronic locking differential (ELD) IPC indicator is never on - the ELD switch LED does not light | IPC HS-CAN MSSeLSD fault |
To diagnose the ELD IPC indicator is never on - the ELD switch LED does not light, GO to Pinpoint Test P |