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.
2003 Toyota Highlander Limited, FWDFACTORY OEM SERVICE PROCEDURE
Body Multiplex Control Systems DTCS
BODY MULTIPLEX CONTROL SYSTEMS DIAGNOSTIC TROUBLE CODES (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B1211/11 | DRIVER DOOR ECU COMMUNICATION STOP |
| B1214 | DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT) |
| B1215 | DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (GND SHORT) |
| B1241 | BODY ECU SWITCH CIRCUIT DIAGNOSIS |
| B1261 | ECM (ENGINE ECU) COMMUNICATION STOP |
| B1262/62 | A/C ECU COMMUNICATION STOP |
| B1269/69 | THEFT DETERRENT ECU COMMUNICATION STOP |
| B1271 | COMBINATION METER ECU COMMUNICATION STOP |
| B1273/73 | SLIDING ROOF ECU COMMUNICATION STOP |
Factory Service Tools
Use the Manual With the Right Hardware
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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.