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.
2021 Toyota Venza XLEFACTORY OEM SERVICE PROCEDURE
Lin Communication System
LIN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [07/2020 - 12/2021]
| DTC Code | Description |
|---|---|
| B120687 | P/W Master SW System Missing Message |
| B127387 | Sliding Roof System Missing Message |
| B232187 | D-Door P/W System Missing Message |
| B232287 | P-Door P/W System Missing Message |
| B232387 | RR-Door P/W System Missing Message |
| B232487 | RL-Door P/W System Missing Message |
| B232588 | Door LIN Bus off |
| B278187 | Steering Lock System Missing Message |
| B278588 | Communication between ECUs connected by LIN Bus off |
| B278987 | ID-BOX Missing Message |
| B278C87 | Power Source Control System Missing Message |
| B278C87 | Power Source Control System Missing Message |
LIN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2021 - ]
| DTC Code | Description |
|---|---|
| B120687 | P/W Master SW System Missing Message |
| B127387 | Sliding Roof System Missing Message |
| B232187 | D-Door P/W System Missing Message |
| B232287 | P-Door P/W System Missing Message |
| B232387 | RR-Door P/W System Missing Message |
| B232487 | RL-Door P/W System Missing Message |
| B232588 | Door LIN Bus off |
| B278588 | Communication between ECUs connected by LIN Bus off |
| B278987 | ID-BOX Missing Message |
| B278C87 | Power Source Control System Missing Message |
| B278C87 | Power Source Control System Missing Message |
Factory Service Tools
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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.