MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC	Description
B1205	AFS ECU COMMUNICATION STOP
B1211	DRIVER DOOR ECU COMMUNICATION STOP
B1212	FRONT PASSENGER DOOR ECU COMMUNICATION STOP
B1213	TILT AND TELESCOPIC ECU COMMUNICATION STOP
B1214, B1215	DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/(GND SHORT)
B1216	REAR RIGHT DOOR ECU COMMUNICATION STOP
B1217	REAR LEFT DOOR ECU COMMUNICATION STOP
B1219	REAR SEAT SWITCH COMMUNICATION STOP
B1248	AVC-LAN COMMUNICATION IMPOSSIBLE
B1262	A/C ECU COMMUNICATION STOP
B1263	LUGGAGE ROOM JUNCTION BLOCK ECU COMMUNICATION STOP
B1266, B1267	INSTRUMENT PANEL SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/(GND SHORT)
B1269	THEFT DETERRENT ECU COMMUNICATION STOP
B1271	COMBINATION METER ECU COMMUNICATION STOP
B1272	POWER SEAT ECU COMMUNICATION STOP
B1273	SLIDING ROOF ECU COMMUNICATION STOP
B1275	ACCESSORY BUS BUFFER COMMUNICATION STOP
B1277	CENTER INTEGRATION ECU COMMUNICATION STOP
B1278	COMBINATION SWITCH ECU COMMUNICATION STOP
B1279	RAIN SENSOR COMMUNICATION STOP
B1281	AIRBAG ECU COMMUNICATION STOP
B1283	DRIVER SIDE JUNCTION BLOCK ECU COMMUNICATION STOP
B1284	PASSENGER SIDE JUNCTION BLOCK ECU COMMUNICATION STOP
B1285	STEERING PAD SWITCH COMMUNICATION STOP
B1291, B1292	LIGHT SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/(GND SHORT)
B1294	IMMOBILIZER ECU COMMUNICATION STOP
B1296	FRONT LIGHT ECU COMMUNICATION STOP
B1297	CLEARANCE SONAR ECU COMMUNICATION STOP
B1298	REAR RIGHT SEAT ECU COMMUNICATION STOP
B1299	REAR LEFT SEAT ECU COMMUNICATION STOP

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.

Safety Warning

Multiplex Communication System DTCS