B1A03

Symptoms

• No sound from speaker 3 or significant reduction in volume
• Sound is choppy or distorted from this speaker
• The malfunction indicator on the dashboard lights up
• Sometimes the problem only appears at certain volume levels
• Constant activation of a diagnostic code without visible external signs

Causes

• Broken or damaged wire in speaker circuit 3
• Oxidation or corrosion of contacts in the speaker connector
• Incorrect connection of speaker wires to the connector
• Internal malfunction of the speaker itself or coil burnout
• Damage to the wiring harness due to chafing or mechanical impact
• Malfunction of the audio system amplifier or its control module
• Short circuit in the speaker power circuit
• Incorrect speaker impedance (not the same as others)

How to Fix

1. Connect a diagnostic scanner and get a complete list of active fault codes
2. Visually check speaker 3: remove the trim panel and inspect the connector and wires for damage
3. Clean the contacts of the speaker connector and amplifier connector from dirt and oxide with alcohol
4. Check the integrity of the wire by ignition and sound using a multimeter (the wire should not be broken)
5. Measure speaker impedance (typically 4 ohms for car speakers)
6. Reconnect the speaker connector and make sure there is a tight connection.
7. Check the audio amplifier for visible damage or burnt components.
8. If the wires are ok, replace the speaker with a new one with the correct parameters
9. After repair, clear the error code and conduct a sound test

Related codes

FAQ