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- Periodic high frequency sound (sounds like an insect buzzing)
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- Resonance in a trim component, e.g. NVH (noise, vibration and harshness) insulating cloth against speaker grill mesh
- Lack of retention of interior and exterior trim panels
- Loose harness/harness clips
- Labels vibrating against trim/nearby components
- Nearby modules vibrating against trim/BIW
- Mechanical failure of internal speaker component
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- Replicate fault and confirm audio source(s) affected: DAB/CD/Bluetooth via phone/USB via phone/USB via iPod®/AM/FM radio
- If fault is specific to one source, audio source must be investigated further as a speaker failure in this instance is less likely, e.g. If issue is only seen on DAB, check DAB module is fully functioning correctly and software is up to date
- Confirm if issue is heard on stereo and/or surround sound settings
- Isolate the customer symptom to specific vehicle area using balance and fade audio settings. Check for any loose objects in the area, e.g. pens, keys, coins, etc
- Check for any previous work carried out in this area by referring to DDW to help in diagnosing the issue
- Check SDD/Pathfinder/Topix for any audio related SSM/TSB and software updates. Carry out service updates as required. Retest to confirm if issue is resolved
- Apply pressure by hand to door/trim panel and nearby modules (i.e. switchpacks) to confirm if there is a change in symptom sound
- If issue is still present, or condition changes by applying pressure to the trim, remove internal trim and apply gentle pressure to components within the door to see if sound changes. This will also allow access to relevant speaker
- If symptom condition is unchanged by applying pressure to the trim, examine trim to find source of audio issue and fix as appropriate using Squeaks and Rattle kit LTB00389. If audio issue is still present then move to step 10
- Check around front face of speaker for any loose items that may be touching the speaker, e.g. debris, loose fixings, etc
- Check all speaker fixing screws are secure and correctly torqued, refer to service information for correct torque figures
- Check harness assembly is not vibrating against speaker unit or nearby trim/components and that it is clipped and routed correctly
- Check harness assembly is not trapped or impeding the speaker unit and rectify as required
- Check harness assembly connections are fully inserted and secured to speaker and amplifier. Also check harnesses are securely connected to nearby components
- Check for harness damage and repair/replace as required
- If a gasket is present on speaker, without removing the speaker visually check it is correctly seated against speaker surface and not noticeably damaged
- If audio issue is still present, remove speaker from mountings, retest speaker in hand to see if the fault is still present
- Check for debris in speaker and remove. Retest speaker in hand
- Check for damage to speaker and replace speaker if damage is present
- Connect new speaker to harness, check new speaker in hand to ensure fault has been rectified. If issue has been resolved, reassemble trim with new trim retention clips
- Check if audio issue is still present. If issue has been resolved, reassemble trim and retest. If issue is still present, contact JLR Dealer Technical Support following the guidelines in the policy and procedures manual
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- No significant extraneous noise, but audio reproduction is not as expected e.g. is not clean sounding
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- Loose trim
- Non JLR-approved equipment installed (e.g. USB cables)
- Resonance in a trim component, e.g. NVH (noise, vibration and harshness) insulating cloth against speaker grill mesh
- Lack of retention of interior and exterior trim panels, nearby harnesses/components
- Mechanical failure of internal speaker component
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