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, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (2 OF 2)NETWORKING DTCSLIN COMMUNICATION SYSTEM
2025 Toyota 4Runner SR5, RWD
Lin Communication System
2025 Toyota 4Runner SR5, RWDSECTION Lin Communication System
LIN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1206-87 | P/W Master SW System Missing Message |
| B1273-87 | Sliding Roof System Missing Message |
| B2106-87 | PRB System Missing Message |
| B2287-87 | LIN Communication Missing Message |
| B2321-87 | D-Door P/W System Missing Message |
| B2322-87 | P-Door P/W System Missing Message |
| B2323-87 | RR-Door P/W System Missing Message |
| B2324-87 | RL-Door P/W System Missing Message |
| B2325-88 | Door LIN Bus off |
| B2327-87 | Back Door P/W System Missing Message |
| B2785-88 | Communication between ECUs connected by LIN Bus off |
| B2789-87 | ID-BOX Missing Message |
| B278C-87 | Power Source Control System Missing Message |
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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.