Positive Lead Measurement / Action Negative Lead — 2016 workshop reference 4458

Disconnect: APIM C2383. Remove the connector cover for C2383 by gently releasing two tabs located near the circuit entry point, and sliding the cover out of place. Backprobe: APIM C2383-12. Backprobe: APIM C2383-13. With the connector cover for C2383 still removed, carefully reconnect: APIM C2383. Ignition ON. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C2383-12		C2383-13

Is the voltage between 1.6 and 6.3 volts?

Yes	GO to X2
No	GO to X7

X2 CHECK THE MICROPHONE’S RESPONSE TO SOUND INPUTS

Operate the audio system in AM/ FM mode. Measure the AC voltage while increasing and decreasing the audio system volume.

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C2383-12		C2383-13

415-00B General Information -Vehicles With Touchscreen Display — original illustration 1, reference 4458Original colors & callouts · Select to enlarge

Is a fluctuating AC voltage present that increases when the audio system volume increases and decreases when the audio system volume decreases?

Yes	GO to X7
No	GO to X3

X3 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: APIM C2383 and reinstall the connector cover. Ignition ON. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C2383-12		Ground
C2383-13		Ground

Is any voltage present?

Source reference 4458

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.