Auto Repairing 2005 Honda Accord Hybrid Humming or Booming Comes From the Speakers
SYMPTOM A loud humming or booming comes from the audio system front speakers. PROBABLE CAUSE The ANC (active noise cancellation) unit is faulty. CORRECTIVE ACTION Replace the ANC unit and the front speakers.DIAGNOSIS Service Advisor Interview the customer to get as much information as possible, and write it on the repair order. Information such as where and when the problem occurs is vital to the diagnosis. Service Technician 1. Carefully remove the lens from the ceiling light. 2. Attach a 4-foot or longer jumper wire to the left (driver’s) side terminal for the ceiling light bulb. 3. With an assistant, test-drive the vehicle as described on the repair order to reproduce the customer’s complaint. When you hear the humming, have your assistant ground the loose end of the jumper wire to the grounding sleeve of the power outlet. Do not allow the jumper wire to touch the bottom of the socket.
• If the noise goes away with the jumper wire grounded, go to REPAIR PROCEDURE. • If the noise does not go away with the jumper wire grounded, this service bulletin does not apply. Refer to the service manual for additional diagnostic information. REPAIR PROCEDURE 1. Replace the ANC unit: • Refer to page 23-81 of the 2005–06 Accord Hybrid Service Manual, or • Online, enter keyword ACTIVE, then select Active Noise Control Unit Removal/ Installation from the list. 2. Replace the frontspeakers: • Refer to page 23-78 of the service manual, or • Online, enter keyword SPEAKER, then select Speaker Replacement from the list. 3. Clear any DTCs with the HDS.
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