Pinpoint Test D : Poor Sound Quality Or Distorted Sound (Buzz/Crackle/ Rattle) From One Or More Speakers (Not All Speakers)
- D1 DETERMINE THE VEHICLE CONTENT
- Determine if the vehicle is equipped with the SYNC ® system.
Is the vehicle equipped with the SYNC ® system?
Yes GO to D2. No GO to D3. - D2 ISOLATE THE ZONE
- Download the diagnostic sound tracks to a suitable USB drive then install the USB drive into the Media Hub. Speaker Audio Test .
- On the audio system select USB input.
- Using the audio system fade and balance feature, adjust the audio sound to each of the four zones (LF, RF, LR, and RR) of the vehicle and use the 6 diagnostic sound tracks to isolate the poor sound quality. Allow each track to run for 10 seconds, then use the Seek buttons to change the test track.
- Locate and apply pressure to the trim panel(s) around the poor sound quality area in question.
Does applying pressure to a trim panel reduce or eliminate the audible noise?
Yes REPAIR or REPLACE the trim panel as needed. No GO to D4. - D3 ISOLATE THE ZONE
- Operate the audio system using digital media (CD, MP3, etc.).
- Using the audio system fade and balance feature, adjust the audio sound to each of the four zones (LF, RF, LR, and RR) of the vehicle to isolate the poor sound quality.
- Locate and apply pressure to the trim panel(s) around the poor sound quality area in question.
Does applying pressure to a trim panel reduce or eliminate the audible noise?
Yes REPAIR or REPLACE the trim panel as needed. No GO to D4. - D4 REMOVE AND INSPECT BEHIND/UNDERNEATH THE SUSPECT TRIM PANEL(S)
- Remove the trim panel to access the suspect speaker.
- Operate the audio system using digital media (CD, MP3, etc.).
- Validate where the poor sound quality area is located.
- Check:
- Trim panel for loose components around the speaker area such as the speaker grille
- Trim panel joining components for missing or broken pieces
- Lock and handle mechanical parts for correct attachment
- Wire harnesses for correct routing
- Wire harness fasteners for correct attachment
- Water shield for correct placement (speaker air path not blocked)
- Water shield for correct bonding to sheet metal
- Storage areas for loose items
- All child safety belt anchors (if equipped)
- All safety belt retractors
- All speaker bracket fasteners and other fasteners are secured and tightened to specified torque
Was the source of the noise located?
Yes REPAIR or REPLACE any loose or broken component or fastener as needed. No GO to D5. - D5 CHECK THE SUSPECT SPEAKER FOR WATER INTRUSION
- Inspect for watermarks.
- Check the:
- Cone
- Magnet
- Basket
Are any watermarks present on the speaker?
Yes VERIFY the water shield is in the correct location, REPAIR or REPLACE any trim, door, or speaker seal as required. DRY the speaker in question and TEST the system for normal operation. No GO to D6. - D6 ISOLATE SPEAKER TO VERIFY NOISE
- Remove the suspect speaker from its location and leave the speaker connected to the harness.
- Hold the speaker away from any trim panel(s) and ensure the speaker is isolated from contact.
- Operate the audio system using digital media (CD, MP3, etc.).
Is the noise still present in the suspect speaker?
Yes INSTALL a new speaker for the one in question. No LOCATE the source of the noise and REPAIR as needed.