Signal Too High / Low

Signal too high / low

Checking the wiring








- Ignition off
- Disconnect the connectors for the front loudspeakers
- Disconnect the 16-pin connector for the audio module (AUD).

Hint: Certain systems may have two loudspeakers connected on the same signal cable, one treble loudspeaker/upper loudspeaker and one front loudspeaker. For further information, see the wiring diagram.

Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.
Check the signal cable. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Take readings between:
- Audio module (AUD) terminal #B1 and loudspeaker terminal #2 in the left front door
- Audio module (AUD) terminal #B9 and loudspeaker terminal #1 in the left front door
- Audio module (AUD) terminal #B3 and loudspeaker terminal #2 in the right front door and the front right treble loudspeaker
- Audio module (AUD) terminal #B11 and loudspeaker terminal #1 in the right front door.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Audio Module (AUD)
- Signal specification Signal Description, Audio Module (AUD)
- Audio module (AUD), replace Audio Module (AUD), Replace Audio module (AUD), replace Audio Module (AUD), Replace
- Loudspeaker, side door front Loudspeaker, Side Door Front
- Checking wiring and terminals Checking Wiring and Terminals










Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check that there is sound heard from the loudspeakers for the audio module (AUD) by trying the FM/AM radio, CD or MD player.

Is the function OK?

Yes - Fault Found

No - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

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