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.
Audio / Video System (Except Plug-In) (W/ Daytime Running Light) (Diagnostic Codes & Symptom Tests)
2012 Toyota Prius ThreeSECTION Audio / Video System (Except Plug-In) (W/ Daytime Running Light) (Diagnostic Codes & Symptom Tests)
- AUDIO AND VISUAL SYSTEM (w/ Daytime Running Light)
- DTC B1579: Voice Recognition Microphone Disconnected
- DTC B1585: USB Device Malfunction
- DTC B15A0: LAN Master Malfunction; DTC B15B0: Display Screen Malfunction; DTC B15B3: Radio Tuner Malfunction; DTC B15B4: CD Changer Malfunction; DTC B15B7: Bluetooth Module Malfunction
- DTC U0073: Sending Malfunction (Navigation to APGS); DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Meter ECU Communication; DTC U0293: Lost Communication with HV ECU
- Symptom Tests
- Noise Occurs
- No Sound can be Heard from Speakers
- Sound Quality is Bad Only when CD is Played (Volume is Too Low)
- CD cannot be Ejected
- CD cannot be Inserted / Played or CD is Ejected Right After Insertion
- CD Sound Skips
- Radio Broadcast cannot be Received or Poor Reception
- Illumination for Panel Switch does not Come on with Tail Switch ON
- Display does not Dim when Light Control Switch is Turned ON
- Panel Switches do not Function
- Touch Panel Switch does not Function
- Screen Flicker or Color Distortion
- Poor Sound Quality in All Modes (Low Volume)
- Voice Guidance does not Function
- Cellular Phone Registration Failure, Phonebook Transfer Failure
- Cellular Phone cannot Make Outgoing/Incoming Calls
- The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted
- The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted
- Sound of Portable Player cannot be Heard from Speakers or Sound is Low
- Does not Play even after Bluetooth Audio Mode is Selected
- Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device
- Noise Occurs or Sound Skips when Portable Player Plays
- Portable Player cannot be Connected Manually/Automatically
- Registered Device cannot be Deleted
- Portable Player cannot be Registered
- USB Audio System Recognition/Play Error
- Black Screen
- Circuit Tests
- Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
- Steering Pad Switch Circuit
- Illumination Circuit
- Parking Brake Switch Circuit
- Speaker Circuit
- Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter
- Data Signal Circuit between Radio Receiver and Stereo Jack Adapter
- Reverse Signal Circuit
- Microphone Circuit between Microphone and Radio Receiver
- Radio Receiver Power Source Circuit
RENDER: 1.0x
NO RELATED
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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.