2006 Lexus RX 400h AWDFACTORY OEM SERVICE PROCEDURE

Multiplex Communication System DTCS

MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Description
B1200 MPX Body ECU Stop
B1205 AFS ECU Communication Stop
B1206 P/W Master Switch
Communication Stop
B1208 Passenger Side Outer Mirror
ECU
B1209 Driver Side Outer Mirror
B1213 Tilt and Telescopic ECU
Communication Stop
B1214 Door System Communication Bus Malfunction (+B Short)
B1215 Door System Communication Bus Malfunction (GND Short)
B1245 Wiper ECU Communication Stop
B1248 AVC-LAN Communication Impossible
B1262 A/C ECU Communication Stop
B1266 Instrument Panel System Communication Bus Malfunction (+B Short)
B1267 Instrument Panel System Communication Bus Malfunction (GND Short)
B1271 Combination Meter ECU
Communication Stop
B1272 Power Seat ECU Communication Stop
B1273 Sliding Roof ECU Communication Stop
B1279 Rain Sensor Communication Stop
B1281 Airbag ECU Communication Stop
B1287 Back Door ECU Communication Stop
B1294 Immobilizer ECU Communication Stop
B1277 Center Cluster Integration Panel
ECU Communication Stop
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.