Renewing the control unit

After the DSC control unit has been replaced, the following work must be performed in this order.

1. Coding

2. Calibration of the DSC sensors

• Steering angle sensor
  
• Rotation rate sensor
  
• Transverse acceleration sensor
  

3. End-of-line test (automatic test run)

The end-of-line test serves to check the DSC sensors in the plant at the end of the assembly line. This test is active on every factory-new DSC control unit and it must therefore also be run every time a factory-new DSC control unit is fitted.

Procedure for end-of-line test:

The sequence varies depending on the vehicle model and control-unit version. Due to the identification of the DSC control unit by the DIS tester, the following procedure results.

• Disconnect the diagnostic plug to exit from the diagnostic mode.
  
• Switch off the ignition for at least 10 seconds to perform a reset of the DSC.
  
• Switch on ignition. This control unit now runs the end-of-line test automatically. No other work is required.
  

The the end-of-line test has been completed successfully when all the warning lamps have gone out.

Faults during end-of-line test:

If the end-of-line test is not concluded successfully (all indicators remain on), the DSC is not working and at least the fault ”6D end-of-line test not carried out” is stored.

The end-of-line test must be repeated. If the end-of-line test fails a second time, it is likely that there is a fault in the area of the rotation rate and transverse acceleration sensor. Run troubleshooting.