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 Prius TwoFACTORY OEM SERVICE PROCEDURE
Can Communication System
POWER MANAGEMENT CONTROL ECU OUTPUT DTCS (TECHSTREAM DISPLAY/POWER MANAGEMENT1)
| DTC Code | Description |
|---|---|
| U0104 | Lost Communication with Driving Support ECU |
| U1002 | Lost Communication with Gateway Module (Power Management1) |
| U1100 | Lost Communication with Seat Belt Control ECU |
POWER MANAGEMENT CONTROL ECU OUTPUT DTCS (TECHSTREAM DISPLAY/POWER MANAGEMENT2)
| DTC Code | Description |
|---|---|
| U0100 | Lost Communication with ECM / PCM |
| U0129 | Lost Communication with Brake System Control Module |
| U0164 | Lost Communication with A/C ECU |
| U1002 | Lost Communication with Gateway Module (Power Management2) |
DRIVING SUPPORT ECU OUTPUT DTCS (TECHSTREAM DISPLAY/PRE-COLLISION2)
| DTC Code | Description |
|---|---|
| U1002 | Lost Communication with Gateway Module (Parking Assist Bus) |
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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