B1593 No response from the stereo component amplifier
What does B1593 mean on a Toyota?
B1593. No response from the stereo component amplifier. The navigation receiver loses AVC-LAN communication with the amplifier. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B1593
- Open or short in the AVC-LAN circuit
- Loose or corroded amplifier connector
- Damaged AVC-LAN harness
- Failed stereo component amplifier assembly
- Failed navigation receiver assembly
How to fix B1593
- Confirm the code and check audio output
- Inspect and reseat the amplifier connectors
- Test the AVC-LAN circuit for opens and shorts
- Check the amplifier power and ground
- Replace the failed part only after tests fail