Signal Too High/Signal Too Low

Signal too high/signal too low

Checking the cable








- Ignition off
- Disconnect the connector for the rear left-hand treble loudspeaker/upper loudspeaker.
- Disconnect the connector for the rear right-hand treble loudspeaker/upper loudspeaker.
- Disconnect the 16-pin connector for the audio module (AUD).

Hint: Both treble loudspeakers and the right and left-hand rear loudspeakers are connected on the following signal cables. 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 between audio module (AUD) terminal #B4 and treble speaker/upper loudspeaker terminal #2 in the rear left. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the signal cable between audio module (AUD) terminal #B12 and treble speaker/upper loudspeaker terminal #1 in the rear left. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the signal cable between audio module (AUD) terminal #B5 and rear right-hand loudspeaker terminal #2. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the signal cable between audio module (AUD) terminal #B13 and the rear right-hand loudspeaker terminal #1. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- Signal specification Signal Specification, Audio Module (AUD)
- Audio Module Audio Module
- Rear Quarter Panel Speaker Rear Quarter Panel Speaker
- 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 - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the cable

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