Structure of the procedure
| Number | Designation |
|---|---|
| 1 | TCD (trouble code description) display |
| 2 | DTC handling (DTC... Diagnostic Trouble Code or fault entry) |
| 3 | Branching with selection of additional functions |
| 4 | Loudspeaker test |
| 5...7 | Other checks |
| 8 | End or end with feedback signal |
The < Checking audio playback and audio amplifier > ABL starts by showing the fault code descriptions.
After display of trouble code description, the fault code memory is read for the currently installed control units. The procedure is continued with the handling of the currently stored fault code entries.
After processing of the fault code entries, a selection structure is displayed that offers the following options (depending on the control unit or vehicle equipment):
- Speaker test
For the test, the loudspeakers installed in the vehicle can be activated and checked. A test sound is output on the selected loudspeaker. After the test, supported troubleshooting is available.
- Interference noises speaker
This function rectifies interference noise audible to the same extent throughout all audio sources. Check in advance whether or not current fault patterns are available for the selected vehicle. These may cause interference noise. If requested, current fault patterns are checked upon opening the interference noise in loudspeakers function before they are transferred to the test schedule. The current ABL is cancelled for this purpose. If no current fault patterns appear in the test schedule as ABL, no fault patterns are available for the selected motor vehicle.
After all relevant test steps have been executed, the procedure can be ended or ended with a feedback signal. In the feedback, select the relevant cause of fault. The relevant diagnosis code is displayed.
The < Checking audio playback and audio amplifier > ABL is permanently enhanced and the contents for DTC troubleshooting and perceived symptoms are updated regularly.