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.
2021 Toyota Prius XLE AWD-eFACTORY OEM SERVICE PROCEDURE
Navigation System
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2015 - 11/2017]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1325 | Lost Communication with HUD |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Device Malfunction |
| B158C | SD Card Communication Malfunction |
| B158F | AV Signal Stoppage (Low Battery Voltage) |
| 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 |
| B15C0 | GPS Antenna Connection Malfunction(short) |
| B15C1 | GPS Antenna Connection Malfunction(break) |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction |
| B15F6 | Main Body ECU Vehicle Information Reading/Writing Process Malfunction |
| B15F7 | Certification ECU Vehicle Information Reading/Writing Process Malfunction |
| B15FE | XM Tuner Antenna Disconnected |
| B15FF | XM Tuner Antenna Short |
| U0073 | Sending Malfunction (Navigation to APGS) |
| U0100 | Engine ECU Communication |
| U0129 | VSC(ECB)ECU Communication |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Air Conditioner ECU Communication |
| U0293 | HV ECU Communication |
| U1110 | Clearance Sonar ECU Communication |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2017 - 12/2018]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1325 | Lost Communication with HUD |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Device Malfunction |
| B158C | SD Card Communication Malfunction |
| B158F | AV Signal Stoppage (Low Battery Voltage) |
| 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 |
| B15C0 | GPS Antenna Connection Malfunction(short) |
| B15C1 | GPS Antenna Connection Malfunction(break) |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction |
| B15F6 | Main Body ECU Vehicle Information Reading/Writing Process Malfunction |
| B15F7 | Certification ECU Vehicle Information Reading/Writing Process Malfunction |
| B15FE | XM Tuner Antenna Disconnected |
| B15FF | XM Tuner Antenna Short |
| U0073 | Sending Malfunction (Navigation to APGS) |
| U0100 | Engine ECU Communication |
| U0129 | VSC(ECB)ECU Communication |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Air Conditioner ECU Communication |
| U0198 | Lost Communication with Telematic Control Module |
| U0293 | HV ECU Communication |
| U1110 | Clearance Sonar ECU Communication |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2018 - 08/2019]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1325 | Lost Communication with HUD |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Device Malfunction |
| B158C | SD Card Communication Malfunction |
| B158F | AV Signal Stoppage (Low Battery Voltage) |
| 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 |
| B15C0 | GPS Antenna Connection Malfunction(short) |
| B15C1 | GPS Antenna Connection Malfunction(break) |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction |
| B15F6 | Main Body ECU Vehicle Information Reading/Writing Process Malfunction |
| B15F7 | Certification ECU Vehicle Information Reading/Writing Process Malfunction |
| B15FE | XM Tuner Antenna Disconnected |
| B15FF | XM Tuner Antenna Short |
| U0073 | Sending Malfunction (Navigation to APGS) |
| U0100 | Engine ECU Communication |
| U0129 | VSC(ECB)ECU Communication |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Air Conditioner ECU Communication |
| U0198 | Lost Communication with Telematic Control Module |
| U0293 | HV ECU Communication |
| U1110 | Clearance Sonar ECU Communication |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [08/2019 -]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1325 | Lost Communication with HUD |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Device Malfunction |
| B158C | SD Card Communication Malfunction |
| B158F | AV Signal Stoppage (Low Battery Voltage) |
| 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 |
| B15C0 | GPS Antenna Connection Malfunction(short) |
| B15C1 | GPS Antenna Connection Malfunction(break) |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction |
| B15F6 | Main Body ECU Vehicle Information Reading/Writing Process Malfunction |
| B15F7 | Certification ECU Vehicle Information Reading/Writing Process Malfunction |
| B15FE | XM Tuner Antenna Disconnected |
| B15FF | XM Tuner Antenna Short |
| U0073 | Sending Malfunction (Navigation to APGS) |
| U0100 | Engine ECU Communication |
| U0129 | VSC(ECB)ECU Communication |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Air Conditioner ECU Communication |
| U0198 | Lost Communication with Telematic Control Module |
| U0293 | HV ECU Communication |
| U1110 | Clearance Sonar ECU Communication |
Factory Service Tools
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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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