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.
2002 Toyota Highlander Limited, AWDFACTORY OEM SERVICE PROCEDURE
Multiplex Communication System DTCS
MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description | |
|---|---|---|
| B1211/11 | No Communication From Driver Door ECU For More Than 10 Seconds | |
| B1214 | Short In Communication Circuit And +B Power Source System | |
| B1215 | Short In Communication Circuit And +B Power Source System | |
| B1241 | Body ECU Swtich Circuit | |
| B1261 | No Communication From ECM For More Than 10 Seconds | |
| B1262/62 | No Communication From A/C ECU For More Than 10 Seconds | |
| B1269/69 | No Communication From Theft Deterrent ECU For More Than 10 Seconds | |
| B1271 | No Communication From Combination Meter ECU For More Than 10 Seconds | |
| B1273/73 | No Communication From Sliding Roof Control ECU For More Than 10 Seconds | |
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.