Dynamic Stability Control Switch
The Dynamic Stability Control (DSC) switch allows the DSC function to be selected off. Although Land Rover recommend that DSC is selected on for all normal driving conditions, it may be beneficial to de-select DSC to maximize traction under the following conditions:
- If the vehicle needs to be rocked out of a hollow or a soft surface.
- Driving on loose surfaces or with snow chains.
- Driving in deep sand, snow or mud.
- On tracks with deep longitudinal ruts.
The DSC switch is a non-latching switch installed in the Terrain Response (TR) switchpack, in the floor console. Operating the DSC switch produces a High Speed (HS) Controller Area Network (CAN) chassis systems bus message from the TR switchpack to the Anti-lock Brake System (ABS) control module. With the first press of the DSC switch, the ABS control module disables the DSC functions. When the DSC switch is pressed again, the ABS control module re-enables the DSC functions. The DSC switch must be pressed for a minimum of 0.3 s for the ABS control module to react. The DSC function is re-enabled at the beginning of each ignition cycle.
The status of the DSC switch selection is shown by the DSC OFF warning indicator. The DSC OFF warning indicator in the Instrument Cluster (IC) is extinguished while DSC is selected on and continuously illuminated while DSC is selected off.
A DSC switch request to disable DSC is ignored by the ABS control module if the air suspension system has failed, or is in off-road height at speeds above 55 km/h (34 mph).
To guard against incorrect operation or in the event of the DTC switch failure, if the input from the DSC switch is operated for more than 1 minute, a Diagnostic Trouble Code (DTC) is stored in the ABS control module.
Even if DSC is deselected, driving maneuvers with extreme yaw or lateral acceleration may trigger DSC activity to assist vehicle stability.