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 Integrated Audio Module (IAM) terminal #A7 and the microphone input terminal #A1 (pin A). Check for an open-circuit.
Check the signal cable between Integrated Audio Module (IAM) terminal #A14 and the microphone input terminal #A2 (pin B). Check for an open-circuit.
Check the resistance between terminal #A1 (pin A) and #A2 (pin B) in the microphone electrical connector. Resistance must be between 100 ohms and 10 kohms.
Remedy as necessary.

Other information
- Checking wiring and terminals Checking Wiring and Terminals
- Signal specification Signal Specification, Integrated Audio Module (IAM)









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. Make a call using the handsfree system.

Does the microphone function?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

Attempt New Test - Checking the component and wiring

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