Activate service mode on parking brake

This function is used to activate the service mode. The parking brake is set in a posterior position and is temporarily disabled (personal protection).
The service mode must be activated when the following repairs are performed:
Test conditions:
Procedure:
  1. Start the function.
  2. Follow the instructions in the program.
  3. The function is complete.
  4. Perform the parking brake operationalisation function when replacement is complete.
  5. Step 4 must be performed to enable the parking brake function.