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
Electronically Controlled Brake System
ELECTRONICALLY CONTROLLED BRAKE SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| 36 | ABS Control System Malfunction |
| 42 | Electronically Controlled Brake System Malfunction |
| 43 | ABS Control System Malfunction |
| 45 | Electronically Controlled Brake System Malfunction |
| C1202/68 | Master Reservoir Level Malfunction |
| C1203/95 | ECM Communication Circuit Malfunction |
| C1210/36 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1211/25 | SLA Linear Solenoid |
| C1212/26 | SLR Linear Solenoid |
| C1214/62 | Hydraulic Control System Malfunction |
| C1225/31 | SA1 Solenoid Circuit |
| C1226/32 | SA2 Solenoid Circuit |
| C1227/33 | SA3 Solenoid Circuit |
| C1228/34 | STR Solenoid Circuit |
| C1231/31 | Steering Angle Sensor Circuit Malfunction |
| C1234/34 | Yaw Rate Sensor Malfunction |
| C1235/35 | Foreign Object is Attached on Tip of Front Speed Sensor RH |
| C1236/36 | Foreign Object is Attached on Tip of Front Speed Sensor LH |
| C1238/38 | Foreign Object is Attached on Tip of Rear Speed Sensor RH |
| C1239/39 | Foreign Object is Attached on Tip of Rear Speed Sensor LH |
| C1241/41 | Low Battery Positive Voltage |
| C1242/42 | Open in IG1 / IG2 Power Source Circuit |
| C1243/43 | Acceleration Sensor Stuck Malfunction |
| C1244/44 | Open or Short in Acceleration Sensor Circuit |
| C1245/45 | Acceleration Sensor Output Malfunction |
| C1246/46 | Master Cylinder Pressure Sensor Malfunction |
| C1247/47 | Stroke Sensor Malfunction |
| C1249/49 | Open in Stop Light Switch Circuit |
| C1252/52 | Brake Booster Pump Motor on Time Abnormally Long |
| C1253/53 | Pump Motor Relay Malfunction |
| C1256/56 | Accumulator Low Pressure |
| C1257/57 | Power Supply Drive Circuit |
| C1259/58 | HV System Regenerative Malfunction |
| C1271/71 | Low Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1272/72 | Low Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1273/73 | Low Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1274/74 | Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1275/75 | Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1276/76 | Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1277/77 | Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1278/78 | Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1279/79 | Acceleration Sensor Output Voltage Malfunction (Test Mode DTC) |
| C1281/81 | Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) |
| C1290/66 | Steering Angle Sensor Zero Point Malfunction |
| C1300 | Skid Control ECU Malfunction |
| C1310/51 | Malfunction in HV system |
| C1311/11 | Open in Main Relay 1 Circuit |
| C1312/12 | Short in Main Relay 1 Circuit |
| C1336/98 | Zero Point Calibration of Acceleration Sensor Undone |
| C1345/66 | Linear Solenoid Valve Offset Learning Undone |
| C1346/71 | Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC) |
| C1352/21 | FR Solenoid |
| C1353/23 | RR Solenoid |
| C1356/22 | FL Solenoid |
| C1357/24 | RL Solenoid |
| C1364/61 | Wheel Cylinder Pressure Sensor Malfunction |
| C1365/54 | Accumulator Pressure Sensor Malfunction |
| C1368/67 | Linear Solenoid Valve Offset Malfunction |
| C1380/64 | Stop Light Control Relay Malfunction |
| C1381/97 | Acceleration Sensor Power Supply Voltage Malfunction |
| C1391/69 | Accumulator Leak Malfunction |
| C1392/48 | Stroke Sensor Zero Point Calibration Undone |
| C1439/66 | Steering Angle Sensor Initialization Incomplete |
| C1440/98 | Unusual Bank Angle Detected |
| C1442/44 | Invalid Data Received from Acceleration Sensor |
| C1443/34 | Invalid Data Received from Yaw Rate Sensor |
| C1445/66 | Vehicle Driven with Steering Angle Sensor not Initialized |
| C1451/72 | Motor Drive Permission Malfunction |
| C1464/31 | Front Speed Sensor RH Circuit |
| C1465/32 | Front Speed Sensor LH Circuit |
| C1466/33 | Rear Speed Sensor RH Circuit |
| C1467/34 | Rear Speed Sensor LH Circuit |
| U0073/94 | Control Module Communication Bus OFF |
| U0120/96 | Lost Communication with Starter / Generator Control Module |
| U0123/62 | Lost Communication with Yaw Rate Sensor Module |
| U0124/95 | Lost Communication with Lateral Acceleration Sensor Module |
| U0126/63 | Lost Communication with Steering Angle Sensor Module |
| U0293/59 | Communication Error from HV ECU |
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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