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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Smart Key System (For Start, W/ Front Lidar Sensor) - Diagnostics - Introduction) >> SMART KEY SYSTEM (for Start Function, with Front LiDAR Sensor) >> Diagnostic Trouble Code Chart [12/2023 - ] >> Diagnostic Trouble Code Chart [12/2023 - ]
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Diagnostic Trouble Code Chart [12/2023 - ]

WARNING: This page is about a different car, the 2024 Toyota Mirai. However, it is still accessible from the selected car via links, so may be relevant.
SMART KEY SYSTEM (FOR START FUNCTION)

DTC No. Detection Item DTC Output from Priority Link
B2271 Ignition Hold Monitor Malfunction Power Source Control A Refer to DTC B2271: Ignition Hold Monitor Malfunction [12/2023 - ]
B2274 ACC Monitor Malfunction Power Source Control A Refer to DTC B2274: ACC Monitor Malfunction [12/2023 - ]
B2275 STSW Monitor Malfunction Power Source Control A Refer to DTC B2275: STSW Monitor Malfunction [12/2023 - ]
B2277 Detecting Vehicle Submersion Power Source Control A Refer to DTC B2277: Detecting Vehicle Submersion [12/2023 - ]
B2278 Engine/Power Switch Malfunction Power Source Control A Refer to DTC B2278: Engine/Power Switch Malfunction [12/2023 - ]
B2282 Vehicle Speed Signal Malfunction Power Source Control A Refer to DTC B2282: Vehicle Speed Signal Malfunction; DTC B2283: Vehicle Speed Sensor Malfunction [12/2023 - ]
B2283 Vehicle Speed Sensor Malfunction Power Source Control A Refer to DTC B2282: Vehicle Speed Signal Malfunction; DTC B2283: Vehicle Speed Sensor Malfunction [12/2023 - ]
B2284 Brake Signal Malfunction Power Source Control A Refer to DTC B2284: Brake Signal Malfunction [12/2023 - ]
B2285 Steering Lock Position Signal Circuit Malfunction Power Source Control A Refer to DTC B2285: Steering Lock Position Signal Circuit Malfunction [12/2023 - ]
B228B System Voltage or GND Energization Malfunction Power Source Control A Refer to DTC B228B: System Voltage or GND Energization Malfunction [12/2023 - ]
B2779 Engine Starter Communication Malfunction Smart Key A Refer to DTC B2779: Engine Starter Communication Malfunction [12/2023 - ]
B2781 Open / Short in Steering Lock ECU Smart Key A Refer to DTC B2781: Open / Short in Steering Lock ECU [12/2023 - ]
B2782 Power Source Control ECU Malfunction Smart Key A Refer to DTC B2782: Power Source Control ECU Malfunction [12/2023 - ]
B2784 Antenna Coil Open / Short Smart Key A Refer to DTC B2784: Antenna Coil Open / Short [12/2023 - ]
B2788 IG2 Signal Malfunction Smart Key A Refer to DTC B2788: IG2 Signal Malfunction [12/2023 - ]
B278A Short to GND in Immobiliser System Power Source Circuit Smart Key A Refer to DTC B278A: Short to GND in Immobiliser System Power Source Circuit [12/2023 - ]
B2790 ID BOX EEPROM Malfunction Smart Key A Refer to DTC B2790: ID BOX EEPROM Malfunction [12/2023 - ]
B2799-86 Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid EV A Refer to DTC B2799-86: Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [12/2023 - ]
B279A-12 Engine Immobiliser System Circuit Short to Battery EV A Refer to DTC B279A-12: Engine Immobiliser System Circuit Short to Battery [12/2023 - ]
B279C-95 Engine Immobiliser System Incorrect Assembly EV A Refer to DTC B279C-95: Engine Immobiliser System Incorrect Assembly [12/2023 - ]
B27A5 Open in Front Floor Electrical Key Oscillator Circuit Smart Key A Refer to DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [12/2023 - ]
B27A6 Open in Rear Floor Electrical Key Oscillator Circuit Smart Key A Refer to DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit [12/2023 - ]
U0103 Lost Communication with Gear Shift Module "A" Power Source Control B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U0129 Lost Communication with Brake System Control Module Smart Key B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U0140 Lost Communication with Body Control Module Power Source Control B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U0142 Lost Communication with Main Body ECU Smart Key B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U0155 Lost Communication with Combination Meter Smart Key B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U0293 Lost Communication With Hybrid Vehicle/EV Control System Power Source Control B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
U1117 Lost Communication with Accessory Gateway Power Source Control B Refer to DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0293: Lost Communication With Hybrid Vehicle/EV Control System; DTC U1117: Lost Communication with Accessory Gateway [12/2023 - ]
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