Multiplex Communication System
Diagnostic Trouble Codes

B1211 - Driver door ECU communication stop

B1221 - Power window switch circuit on driver door

B1221 should be output whenever the power window master switch is in the down position.

B1222 - Door lock switch circuit on driver door

B1222 should be output whenever the door lock switch is operated.

B1241 - Body ECU switch circuit diagnosis

B1241 will be output if the stop light switch is stuck on.

B1242 - Wireless door lock tuner circuit malfunction

B1248 - AVC-LAN circuit communication stop

B1261 - ECM communication stop

B1262 - A/C amplifier communication stop

B1266 - Instrument panel system communication bus malfunction (+B short)

B1267 - Instrument panel system communication bus malfunction (GND short)

B1274 - Multi display communication stop

B1293 - Gateway ECU communication circuit

Last edited December 4, 2003.  All material Copyright © 2003 Graham Davies.  No liability accepted.