Signal Missing

Signal missing

Checking the component and wiring








- Ignition off
- Disconnect the connector for the microphone.
Check the cable terminals. Check for contact resistance, loose connections and oxidation.
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 an open-circuit.
Check the signal cable between audio module (AUD) terminal #B16 and microphone input terminal #A1 (pin A). Check for an open-circuit.
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 Description, Audio Module (AUD)
- Audio Module Audio Module
- Microphone telephone Microphone Telephone
- 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 - Troubleshooting procedure complete

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.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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