Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Toyota Avalon BaseFACTORY OEM SERVICE PROCEDURE
Navigation System
NAVIGATION SYSTEM DTC IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1561 | XM Tuner Disconnected (Command Line) |
| B1562 | XM Tuner Disconnected (Burst Mode) |
| B156B | Multi-media Interface ECU Disconnected |
| B156E | No Response from Multi-media Interface ECU |
| B1582 | Map Disk Reading Malfunction |
| B1585 | USB Media Malfunction |
| B1593 | No Response from Stereo Component Amplifier |
| B159F | No Response from XM Tuner |
| B15A0 | LAN Master Malfunction |
| B15A3 | Stereo Component Amplifier Malfunction |
| B15AD | Navigation Processor Malfunction |
| B15B0 | Display Screen Malfunction |
| B15B3 | Radio Tuner Malfunction |
| B15B4 | CD Changer Malfunction |
| B15B7 | Bluetooth Module Malfunction |
| B15BA | XM Tuner Malfunction |
| B15BB | Multi-media Interface ECU Malfunction |
| B15C0 | Short in GPS Antenna |
| B15C1 | Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15DF | USB Communication Malfunction |
| B15E1 | Media Malfunction |
| B15FE | XM Tuner Antenna Disconnected |
| B15FF | XM Tuner Antenna Short |
| U0073 | Control Module Communication Bus Off |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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