Hi all.

I wonder could anyone help me with this problem I am having.

Brake lights aren't working. But I tried changing b.l. switch. (And I adjusted it correctly). Also, I checked fuses and bulbs. New battery too.

Some symptoms I think are related:

The radio suddenly stopped working. Power is still going to it (it lights up and the controls work), but no sound... This happened before... Then the sound suddenly came back weeks later and I have a suspicion (if I remember correctly) that the brake lights were out while the radio was out, and returned when the radio righted itself.

I ran a diagnostic. Can anyone decipher it for me?

Thank you.


VAG-COM Version: Release 409.1-S


Chassis Type: 8D - Audi A4 B5
Scan: 01,02,03,08,15,17,25,35,45,55,56

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Address 01: Engine
Controller: 028 906 021 FL
Component: 1.9l R4 EDC 00SG 0814
Coding: 00002
Shop #: WSC 00891
2 Faults Found:
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - - Intermittent
00741 - Brake Pedal Monitoring
27-10 - Implausible Signal - Intermittent
Readiness: N/A

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Skipping Address 15-Airbags

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Address 17: Instruments
Controller: 8D0 919 035 A
Component: B5-KOMBIINSTRUMENT D07
Coding: 00440
Shop #: WSC 26112
No fault code found.

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Address 25: Immobilizer
Controller: 4A0 953 234
Component: IMMO AUZ9Z0T1661789 D76
Coding: 00000
Shop #: WSC 00012
1 Fault Found:
01176 - Key
07-10 - Signal too Low - Intermittent

End

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* 1996 Audi A4 TDi 1Z

 

the immobilizer code and the key signal too low code are related. possibly a problem with your ECU and/or the immobilizer chip in your key.

the other, implausible signal from the brake pedal monitoring, first thought is that the brake light switch is bad but you mentioned that you already changed it. the only other thing I can think of, coupled with your radio problem, is that you have some wires shorted somewhere.

could also be the wrong brake light bulbs, or your bulb holders are bad.

good luck