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.
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HOMESERVICE MANUALSTOYOTA2025GRAND HIGHLANDER HYBRID LIMITEDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSSMART KEY SYSTEM (START FUNCTION) (HYBRID) - DIAGNOSTIC CODES (1 OF 2)
2025 Toyota Grand Highlander Hybrid Limited
Smart Key System (Start Function) (Hybrid) - Diagnostic Codes (1 Of 2)
2025 Toyota Grand Highlander Hybrid LimitedSECTION Smart Key System (Start Function) (Hybrid) - Diagnostic Codes (1 Of 2)
- SMART KEY SYSTEM (for Start Function, except Gasoline Model)
- DTC B2271-11: IG Circuit Short to Ground [06/2023 - ]
- DTC B2274-11: ACC Circuit Short to Ground [06/2023 - ]
- DTC B2275-11: Starter Circuit Short to Ground; DTC B2275-12: Starter Circuit Short to Battery [06/2023 - ]
- DTC B2278-62: Engine/Power Switch Signal Compare Failure [06/2023 - ]
- DTC B2282-31: Vehicle Speed Signal Circuit Open; DTC B2282-62: Vehicle Speed Signal Compare Failure [06/2023 - ]
- DTC B2285-62: Steering Lock Position Signal Compare Failure [06/2023 - ]
- DTC B228B-00: Battery Circuit or Ground Circuit Energization Malfunction [06/2023 - ]
- DTC B277A-96: Wireless Starter Component Internal Failure [06/2023 - ]
- DTC B2781-96: Steering Lock System Component Internal Failure; DTC B2782-11: Power Source Control System Circuit Short to Ground; DTC B2782-15: Power Source Control System Circuit Short to Battery or Open; DTC B279F-1C: Steering Lock Confirmation Signal Circuit Voltage Out of Range [06/2023 - ]
- DTC B2784-1C: Antenna Coil Circuit Voltage Out of Range [06/2023 - ]
- DTC B278D-96: ID-BOX Component Internal Failure [06/2023 - ]
- DTC B278E-87: Immobilizer Amp Missing Message [06/2023 - ]
- DTC B2790-46: ID-BOX Calibration / Parameter Memory Failure [06/2023 - ]
- DTC B2799-86: Engine Immobilizer System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [06/2023 - ]
- DTC B279A-12: Engine Immobilizer System Circuit Short to Battery [06/2023 - ]
- DTC B279C-95: Engine Immobilizer System Incorrect Assembly [06/2023 - ]
- DTC B27A5-13: Front Floor Electrical Key Oscillator Circuit Open [06/2023 - ]
- DTC B27A6-13: Rear Floor Electrical Key Oscillator Circuit Open [06/2023 - ]
- DTC B27A7-13: Rear Floor 2 Electrical Key Oscillator Circuit Open [06/2023 - ]
- DTC P0571-62: Brake Switch "A" Signal Compare Failure [06/2023 - ]
RENDER: 1.0x
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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.