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.
2013 Lexus GX 460 BaseFACTORY OEM SERVICE PROCEDURE
Navigation System
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B156B | Multi-media Interface ECU Disconnected |
| B156E | No Response from Multi-media Interface ECU |
| B1591 | No Response from Audio HU |
| B1593 | No Response from Stereo Component Amplifier |
| B1595 | No Response from Rear Seat Entertainment System |
| B15A0 | LAN Master Malfunction |
| B15A6 | Display Malfunction |
| B15AD | Navigation Processor Malfunction |
| B15B0 | Display Screen Malfunction |
| B15B8 | Harddisk Malfunction |
| B15BB | Multi-media Interface ECU Malfunction |
| B15C0 | Short in GPS Antenna |
| B15C1 | Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction |
| B15D0 | MOST Communication Malfunction |
| B15D1 | Audio HU Disconnected |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15D5 | Rear Seat Entertainment System Disconnected |
| B15D8 | Monitor Disconnected |
| B15E7 | Harddisk Reading/Writing Malfunction(Low Temperature) |
| B15E8 | Harddisk Reading/Writing Malfunction(High Temperature) |
| U0073 | Control Module Communication Bus Off |
| U0100 | Lost Communication with ECM |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0155 | Lost Communication with Combination Meter |
| U0164 | Lost Communication with A/C ECU |
| U1110 | Lost Communication with Clearance Warning ECU |
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.