CAS Enable Line

CAS Enable Line

The CAS enable line is used to transmit the engine start enable status from the DDE to the CAS.
The DDE uses various statuses to determine whether the engine start can be enabled. These statuses may be, for example:
- EWS enabled
- Brake operated
- Clutch operated
- Preheating active
The statuses are checked by the DDE\n when the vehicle is unlocked and the engine start enable status is transmitted to the CAS. If the Start button is not pressed within a few seconds, the start enable is withdrawn. If the engine start request is detected via terminal 50, the engine start enable status\n is transferred again.
If the DDE enables the engine start and terminal 50 is detected, the CAS enables the activation of the starter motor.
The transmission of the engine start enable status via the S_START signal is performed in parallel via the CAN bus.

Fault recognition in engine control unit
The following faults are monitored in the engine control unit:
- The DDE monitors the signal transmission via the line.
Engine start is inhibited if a fault is detected.