Pinpoint Test F : No Sound From All Speakers
- F1 CHECK THE START SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C240A .
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C240A-3 Ground
Is the voltage 5V or greater?
Yes REPAIR the circuit. No GO to F2. - F2 CHECK FOR SPEAKER DTCs
- Ignition ON.
- Using a diagnostic scan tool, perform the ACM self-test.
Are any DTCs present?
Yes Refer to Information and Entertainment System - Premium Plus . No GO to F3. - F3 CHECK FOR CORRECT ACM OPERATION
- Ignition OFF.
- Disconnect and inspect all 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new ACM. Refer to Audio Control Module (ACM) . 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.
