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 Tacoma TRD Pro, Automatic TransFACTORY OEM SERVICE PROCEDURE
Navigation System
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [08/2015 - 11/2017]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B1552 | Extension Module Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Media Malfunction |
| B158A | Extension Module Noise Adjustment 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 | Short in GPS Antenna |
| B15C1 | Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | A/C 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 | Lost Communication with ECM / PCM "A" |
| U0129 | Lost Communication with Brake System Control Module |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Lost Communication with A/C ECU |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2017 - 09/2018]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B1552 | Extension Module Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Media Malfunction |
| B158A | Extension Module Noise Adjustment 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 | Short in GPS Antenna |
| B15C1 | Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | A/C 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 | Lost Communication with ECM / PCM "A" |
| U0129 | Lost Communication with Brake System Control Module |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Lost Communication with A/C ECU |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [09/2018 - 09/2019]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B1532 | LVDS Signal Malfunction (from Extension Module) |
| B1551 | HD Radio Tuner Malfunction |
| B1552 | Extension Module Malfunction |
| B156C | Extension Module Disconnected |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Media Malfunction |
| B158A | Extension Module Noise Adjustment 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 | Short in GPS Antenna |
| B15C1 | Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction |
| B15C3 | Speaker Output Short |
| B15D3 | Stereo Component Amplifier Disconnected |
| B15F5 | A/C 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 | Lost Communication with ECM / PCM "A" |
| U0129 | Lost Communication with Brake System Control Module |
| U0140 | Lost Communication with Body Control Module |
| U0155 | Meter ECU Communication |
| U0164 | Lost Communication with A/C ECU |
NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [09/2019 -]
| DTC Code | Description |
|---|---|
| B1324 | Lost Communication with Meter |
| B153A | GVIF Disconnected (from Extension Module to H/U) |
| B1543 | Extension Module Disconnected 2 |
| B1551 | HD Radio Tuner Malfunction |
| B1556 | Extension Module Malfunction 2 |
| B1579 | Voice Recognition Microphone Disconnected |
| B1585 | USB Device Malfunction |
| B158D | Video Signal Stoppage |
| B158F | AV Signal Stoppage (Low Battery Voltage) |
| B15A0 | LAN Master Malfunction |
| B15AD | Navigation Processor Malfunction |
| B15B0 | Display Screen Malfunction |
| B15B3 | Radio Tuner Malfunction |
| B15B7 | Bluetooth Module Malfunction |
| B15BA | XM Tuner Malfunction |
| B15C0 | GPS Antenna Connection Malfunction (short) |
| B15C1 | GPS Antenna Connection Malfunction (break) |
| 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 |
| C1622 | Back Camera Disconnected |
| 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 |
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.