CD Changer: Testing and Inspection

General information on the fault memory

Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- Battery disconnected.
- Plug connections disconnected.
- Power failure.

In these situations, no fault is present in the system and the fault memory must be erased.

Fault memory Info key [F8]
In order to be able to assess the fault exactly, the fault memory Info key[F8]must be pressed. This information should be saved using the Save key [F4] and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

Open circuit - short to ground / voltage short / version; vehicle parameters / counter

Frequency counter When a fault first occurs, a fault entry with the status 'present' is set in the fault memory and the counter is simultaneously set to '50'.

If a fault is present, the counter is incremented by one whenever the system is 'booted'. The maximum count is 255.

The counter is decremented if the status 'fault no longer present' is entered and the fault does not occur again when the system is 'booted'. The entry in the fault memory is erased automatically when the counter reaches 0. If the error occurs again when the counter is between 1 and 49, the counter is reset to 50.
CD number The position of the affected audio CD in the magazine (1-6) is displayed.