At regular intervals of 10 s, the MID requests the device status from the connected communication devices AUDIO , TELEPHONE and IKE . If a valid response is not obtained over 2 request cycles, the corresponding device is blocked in the MID . i.e. the information of the communication device is cleared in the display and the relevant selection button is blocked. In this case, the MID enters the corresponding device as being faulty in its defect code memory.
The status inquiries are continued for the defective communication device in order to give it the chance of signalling again.
Resumption of normal operation and thus cancellation of the user lockout, takes place after two successful status scanning cycles. The entry in the defect code memory is then set to "does not exist at present".
Possible defect code entries:
Defect code |
Defect |
|---|---|
1 |
No valid status feedback from the instrument cluster electronics (IKE ) |
2 |
No valid status feedback from the radio (AUDIO ) |
3 |
No valid status feedback from the telephone (TELEPHONE ) |