Radio - Self Diagnostic Information

REF. NO. MBNA 82/78

TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS

DATE: September 1994

SUBJECT:
ALL MODELS WITH BECKER RADIO (P/N 003 820 36 86) AS OF M.Y. 1994
RADIO DIAGNOSTIC INFORMATION





The Becker radio introduced on model year 1994 vehicles has a two-level diagnostic mode. This allows technicians to verify the information on the table shown.

Radio must be turned ON and coded to enter diagnostic mode.

Each step in the entry process must be completed within four seconds.

To enter Level One Diagnostic Mode





1. Press the Bass/Treble selector button (3) on the faceplate. The LCD display should read BASS.

2. Simultaneously press the AM/FM (6) and WB (7) buttons on the faceplate. The LCD display should read TEST.

To enter Level Two Diagnostic Mode

1. Follow procedure to enter Level One Diagnostic Mode.

2. Press the Track selector button (8, TRK). The LCD display should read TEST.

3. Simultaneously press the AM/FM (6) and WB (7) buttons on the faceplate. The LCD display should read BAW2.

To select the different Test Functions/Information (see table shown) press the seek tuning (SEEK) button (9).

The actual level, numerical value or visual indication for each test function can be accessed by pressing the manual tuning (TUNE) button (11).

Note:
The values for GAL in Level Two Diagnostic Mode change according to vehicle speed.





Example of level one data





Example of Level Two data