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.
2017 Toyota MiraiFACTORY OEM SERVICE PROCEDURE
Front Camera System
FRONT CAMERA SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C10001C | Control Module Internal Temperature Sensor "A" Circuit Circuit Voltage Out of Range |
| C10051C | Control Module Internal Temperature Sensor "B" Circuit Circuit Voltage Out of Range |
| C100A62 | Control Module Internal Temperature Sensor A/B Correlation Signal Compare Failure |
| C1A4A12 | Buzzer Circuit Short to Battery |
| C1A4A14 | Buzzer Circuit Short to Ground or Open |
| C1A9346 | Main Microcomputer in Front Recognition Camera Calibration/Parameter Memory Failure |
| C1A9445 | Image Processing Microcomputer in Front Recognition Camera Program Memory Failure |
| C1A9447 | Image Processing Microcomputer in Front Recognition Camera Watchdog/Safety MCU Failure |
| C1A9487 | Image Processing Microcomputer to Main Microcomputer in Front Recognition Camera Missing Message |
| C1A9500 | Image Processing Module Malfunction in Front Recognition Camera |
| C1A961C | Power Supply Circuit in Front Recognition Camera Circuit Voltage Out of Range |
| C1AA800 | Front Recognition Camera Optical Axis Misalignment Malfunction |
| C1AAE00 | Front Recognition Camera Heater Malfunction |
| U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message |
| U012687 | Lost Communication with Steering Angle Sensor Module Missing Message |
| U012987 | Lost Communication with Brake System Control Module Missing Message |
| U014087 | Lost Communication with Body Control Module Missing Message |
| U029387 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message |
| U030051 | Internal Control Module Software Incompatibility Not Programmed |
| U030057 | Internal Control Module Software Incompatibility Invalid / Incompatible Software Component |
| U032251 | Software Incompatibility with Body Control Module Not Programmed |
| U032257 | Software Incompatibility with Body Control Module Invalid/Incompatible Software Component |
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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