Pinpoint Test E : Poor Sound Quality From All Speakers
- E1 CHECK FOR AUDIO DSP MODULE AND ACM DTCs
- Ignition ON.
- Using a diagnostic scan tool, perform the audio DSP MODULE and ACM DTCs self-test.
Are any DTCs recorded in the audio DSP MODULE and ACM ?
Yes For audio DSP module DTCs, Refer to the DTC chart . For ACM DTCs, REFER to Information and Entertainment Systems Premium Plus . No GO to E2. - E2 CHECK THE AUDIO SIGNAL TO THE AUDIO DSP MODULE FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Audio DSP Module C3154A .
- Disconnect: ACM C240A .
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C3154A-7 Ground C3154A-17 Ground C3154A-9 Ground C3154A-19 Ground
Is any voltage present?
Yes REPAIR the circuit in question. No GO to E3. - E3 CHECK THE AUDIO SIGNAL TO THE AUDIO DSP MODULE FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C3154A-7 Ground C3154A-17 Ground C3154A-9 Ground C3154A-19 Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to E4. No REPAIR the circuit in question. - E4 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) . Test the system for normal operation. If the concern is still present, GO to E5. 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. - E5 CHECK FOR CORRECT AUDIO DSP MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect all the audio DSP module 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 audio DSP module 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 audio DSP module. Refer to Audio Digital Signal Processing (DSP) Module . 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.
