EWS-DME/DDE interface
Identical variable codes are stored in the CAS control module and in the DME/DDE control module. The value of these codes changes after every start procedure. Start enable only takes place if the code sent by the CAS control module agrees with the code calculated in the DME/DDE control module.
The control modules are allocated only during initial programming of the DME/DDE control module. The engine control module then adopts the basic code of the CAS control module.
IMPORTANT:
It is not possible
to replace the DME/DDE or CAS control modules for test purposes!
In rare cases, it is possible that the variable codes in both control modules deviate from each other. In these cases, it is possible to reset both codes to the initial value via the service function 'DME (DDE) - CAS matching' (EWS calibration).