Dynamic Stability Control Mk60 and Mk60E5 System control

The DSC main unit

The DSC Mk60 is fitted on vehicles with 4-cylinder engines.
The DSC Mk60E5 is fitted on vehicles with 6-cylinder engines.
A variant of the DSC Mk60E5 is fitted in the E60 M5. This variant is adapted to the M5 / M6.
Sequence for replacement of the DSC unit or DSC control module
(DSC MK60 and DSC MK605E)
After replacement of the DSC module or of the DSC control module, the following work is to be performed in the following order:
1. Coding DSC
On code the DSC, vehicle-specific data records are selected (e.g. size of the brakes). At the same time, the data for coding for the steering column switching center is stored and transferred across the F-CAN to the SZL (not on the M5/M6). This means that if the SZL is replaced the DSC control module also has to be coded. Without successful coding, no calibration of the steering-angle sensor is possible.
Even if there are faults in the DSC, coding is normally possible.
2. Calibration of steering-angle sensor
The zero point of the steering-angle sensor, the vehicle identification number and the serial number of the SZL are stored.
3. Calibration of DSC unit
MK60: The internal brake pressure sensor is calibrated.
MK60 E5: The internal pressure sensors and the valves (characteristic curve for the flow volume) are calibrated. The internal longitudinal acceleration sensor (not M5/M6) is calibrated.
In the event of faults that affect the valves or pressure sensors, the calibration might not be possible.
4. Venting routine for DSC unit
5. Check for swapped brake lines
6. Initialize Run Flat Indicator.

After replacement of the DSC sensor, the service function (Calibration DSC sensor) must be run. The lateral acceleration sensor or lateral-acceleration sensors are calibrated in the DSC sensor.

The steering-angle sensor forms a unit with the steering column switching center. It cannot be replaced alone.
The service function (Calibration steering-angle sensor), or in the case of vehicles with active steering, the service function (Commissioning/Adjustment active steering), must be run after the following work:
· Replacement of steering column switching center
· Coding of the DSC control module or coding of the SZL
· Replacement of DSC control module
· Adjustment work on the steering geometry
· Work on the steering and/or front axle

An internal brake pressure sensor replaces the two brake pressure sensors on the main brake cylinder. This brake pressure sensor cannot be replaced separately.
The hardware and software of the control module have been adapted to the vehicle circuit structure.

The software of the control module can be updated when required by authorized dealerships in compliance with strict security and procedure rules.
For Condition Based Service, the brake lining wear is determined by the DSC control module. The brake-pad wear sensors are therefore designed in two stages, one sensor per axle.
On the M5 and M6, two sensors are fitted for the front axle and one sensor is fitted for the rear axle.
Faults in the Steering Column Switching Center (SZL) are sent across the F-CAN to the DSC and stored in the DSC control module.
As of 12/04, when coding the DSC the coding data for the SZL is transferred across the F-CAN. The SZL is coded in this way.
The control-module functions for the SZL can be called up via the DSC control module.

The DSC unit contains 5 internal pressure sensors and valve with variable characteristic curves for the flow volume: so-called (analogized) solenoid valves.
The characteristic curves for the flow volume must be learned (calibrated).
A longitudinal acceleration sensor is integrated on the board of the control module (not M5 and M6).
M5 and M6: the longitudinal acceleration signal is transferred from the gearbox via the PT CAN to the DSC.
The version of the DSC sensor for vehicles with active steering delivers redundant signals (2 for yaw rate, 2 for lateral acceleration).
The control module has been completely revised and contains new functions:
· Drive-off assistant
· Brake standby
· Dry braking
· Increase in the brake pressure on fading
· Soft stop

The E60 M5 has a steering column switching center with its own diagnosis address. The diagnostic fault code memory entries and control-module functions for the SZL are therefore evaluated directly in the SZL and not in the DSC (same as E60). This means that after replacement of the SZL no coding of the DSC is required.
 

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