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 MANUALSTOYOTA2025COROLLA CROSS L, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (4 OF 4)THEFT DETERRENT / KEYLESS ENTRY DTCSSMART KEY SYSTEM (FOR ENTRY FUNCTION) (2022)
2025 Toyota Corolla Cross L, FWD
SMART KEY SYSTEM (for Entry Function) (2022)
2025 Toyota Corolla Cross L, FWDSECTION SMART KEY SYSTEM (for Entry Function) (2022)
SMART KEY SYSTEM (FOR ENTRY FUNCTION) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B27A1-13 | Driver Side Electrical Antenna Circuit Open |
| B27A2-13 | Front Passenger Side Electrical Antenna Circuit Open |
| B27A8-13 | Outside Luggage Compartment (Back Door) Electrical key Antenna Circuit Open |
| 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 Missing Message |
| U0230-87 | Lost Communication with Rear Gate Module Missing Message |
| U1117-87 | Lost Communication with Accessory Gateway 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.