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 MANUALSTOYOTA20254RUNNER SR5, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSDIGITAL KEY SYSTEM - DIAGNOSTICS - INTRODUCTIONDIGITAL KEY SYSTEMDIAGNOSTIC TROUBLE CODE CHART [12/2024 - ]DIAGNOSTIC TROUBLE CODE CHART [12/2024 - ]
2025 Toyota 4Runner SR5, 4WD
Diagnostic Trouble Code Chart [12/2024 - ]
2025 Toyota 4Runner SR5, 4WDSECTION Diagnostic Trouble Code Chart [12/2024 - ]
DIGITAL KEY SYSTEM
| DTC No. | Detection Item | DTC Output from | Priority | Link |
|---|---|---|---|---|
| B27C0-57 | Digital Key System Invalid/Incompatible Software Component | Smart Key | A | Refer to DTC B27C0-57: Digital Key System Invalid/Incompatible Software Component [12/2024 - ] |
| B27C0-87 | Digital Key System Missing Message | Smart Key | A | Refer to DTC B27C0-87: Digital Key System Missing Message [12/2024 - ] |
| B27C3-87 | Driver Side BLE Antenna Missing Message | Smart Key | A | Refer to DTC B27C3-87: Driver Side BLE Antenna Missing Message [12/2024 - ] |
| B27C4-87 | Front Passenger Side BLE Antenna Missing Message | Smart Key | A | Refer to DTC B27C4-87: Front Passenger Side BLE Antenna Missing Message [12/2024 - ] |
| B27C5-87 | Outside Luggage Compartment (Back Door) BLE Antenna Missing Message | Smart Key | A | Refer to DTC B27C5-87: Outside Luggage Compartment (Back Door) BLE Antenna Missing Message [12/2024 - ] |
| B27C6-87 | Front Floor BLE Antenna Missing Message | Smart Key | A | Refer to DTC B27C6-87: Front Floor BLE Antenna Missing Message [12/2024 - ] |
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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.