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.
2005 Lexus RX 330 AWDFACTORY OEM SERVICE PROCEDURE
Multiplex Communication System DTCS
MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B1205 | HEADLAMP SWIVEL ECU COMMUNICATION STOP |
| DTC B1206 | POWER WINDOW MASTER SWITCH COMMUNICATION STOP |
| DTC B1208 | PASSENGER SIDE OUTER MIRROR ECU COMMUNICATION STOP |
| DTC B1209 | DRIVER SIDE OUTER MIRROR COMMUNICATION STOP |
| DTC B1213 | TILT AND TELESCOPIC ECU COMMUNICATION STOP |
| DTC B1214, B1215 | DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/(GND SHORT) |
| DTC B1245 | WIPER ECU COMMUNICATION STOP |
| DTC B1261 | ECM COMMUNICATION STOP |
| DTC B1262 | A/C ECU COMMUNICATION STOP |
| DTC B1271 | COMBINATION METER ECU COMMUNICATION STOP |
| DTC B1272 | POWER SEAT ECU COMMUNICATION STOP |
| DTC B1273 | SLIDING ROOF ECU COMMUNICATION STOP |
| DTC B1277 | CENTER CLUSTER INTEGRATION SWITCH COMMUNICATION STOP |
| DTC B1279 | RAIN SENSOR COMMUNICATION STOP |
| DTC B1281 | AIRBAG ECU COMMUNICATION STOP |
| DTC B1287 | BACK DOOR ECU COMMUNICATION STOP |
| DTC B1293 | GATEWAY ECU (AVC-LAN) COMMUNICATION STOP |
| DTC B1294 | IMMOBILIZER 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.
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