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.
SMART KEY SYSTEM (for Start Function, HEV Model)
2025 Toyota 4Runner SR5, RWDSECTION SMART KEY SYSTEM (for Start Function, HEV Model)
SMART KEY SYSTEM (FOR START FUNCTION, HEV MODEL) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B2271-11 | IG Circuit Short to Ground |
| B2274-11 | ACC Circuit Short to Ground |
| B2278-62 | Engine/Power Switch Signal Compare Failure |
| B2280-11 | Starter Request Circuit Circuit Short to Ground |
| B2282-31 | Vehicle Speed Signal Circuit Open |
| B2282-62 | Vehicle Speed Signal Compare Failure |
| B2285-62 | Steering Lock Position Signal Compare Failure |
| B228B-00 | Battery Circuit or Ground Circuit Energization Malfunction |
| B277A-96 | Wireless Starter Component Internal Failure |
| B2781-96 | Steering Lock System Component Internal Failure |
| B2782-11 | Power Source Control System Circuit Short to Ground |
| B2782-15 | Power Source Control System Circuit Short to Battery or Open |
| B2784-1C | Antenna Coil Circuit Voltage Out of Range |
| B278D-96 | ID-BOX Component Internal Failure |
| B278E-87 | Immobiliser Amp Missing Message |
| B2790-46 | ID-BOX Calibration / Parameter Memory Failure |
| B2799-86 | Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid |
| B279A-12 | Engine Immobiliser System Circuit Short to Battery |
| B279C-95 | Engine Immobiliser System Incorrect Assembly |
| B279F-1C | Steering Lock Confirmation Signal Circuit Voltage Out of Range |
| B27A5-13 | Front Floor Electrical Key Oscillator Circuit Open |
| B27A6-13 | Rear Floor Electrical Key Oscillator Circuit Open |
| B27A7-13 | Rear Floor 2 Electrical Key Oscillator Circuit Open |
| P0335-62 | Crankshaft Position Sensor "A" Signal Compare Failure |
| P0571-62 | Brake Switch "A" Signal Compare Failure |
| U0100-87 | Lost Communication With ECM/PCM "A" Missing Message |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message |
| U0140-87 | Lost Communication with Body Control Module Missing Message |
| U0155-87 | Lost Communication with Instrument Panel Cluster (IPC) Control Module |
| U0163-87 | Lost Communication with Navigation Control Module Missing Message |
| U0230-87 | Lost Communication with Rear Gate Module Missing Message |
| U1117-87 | Lost Communication with Accessory Gateway Missing Message |
| U114F-87 | Lost Communication with Power Integration Module Missing Message |
RENDER: 1.0x
NO RELATED
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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.