O4 CHECK THE AUDIO CIRCUITS TO THE LHR (LEFT-HAND REAR) QUARTER PANEL SPEAKER FOR AN OPEN
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C395-1 | C240A-21 | |
C395-4 | C240A-9 |
Are the resistances less than 3 ohms?
Yes | GO to O5 |
|---|---|
No | REPAIR the circuit in question. |
O5 CHECK THE AUDIO CIRCUITS TO THE LHR (LEFT-HAND REAR) QUARTER PANEL SPEAKER FOR A SHORT TOGETHER
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C395-1 | C395-4 |
Is the resistance greater than 10,000 ohms?
Yes | GO to O6 |
|---|---|
No | REPAIR the circuit in question. |
O6 CHECK FOR CORRECT ACM (AUDIO FRONT CONTROL MODULE) OPERATION
Ignition OFF. Disconnect and inspect all the ACM connectors. Repair:
Corrosion (clean module pins or install new connectors or terminals) Damaged or bent pins (install new terminals or pins) Pushed-out pins (install new pins as necessary)
Reconnect the ACM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation). |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. |
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.