Signal Too Low

Signal too low

Checking the component and wiring








- Ignition off
- Disconnect the connector for the microphone in the rear view mirror
- Disconnect the 16-pin connector for the audio module (AUD).
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 #B8 and microphone input terminal #A2 (pin B). Check for a short-circuit to ground.
Check the signal cable between audio module (AUD) terminal #B16 and microphone input terminal #A1 (pin A). Check for a short-circuit to ground.
Check the resistance between terminal #A1 (pin A) and #A2 (pin B) in the microphone connector. The resistance should be between 100 ohms - 10 kohms.
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
- Microphone telephone Service and Repair
- 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 the microphone input functions by activating the microphone appropriately. For example, make a call using the hands-free system.

Does the microphone function?

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 component and wiring

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