Refer to DTC B1214 DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT), DTC B1215 DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (GND SHORT), DTC B1266 INSTRUMENT PANEL SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT), DTC B1267 INSTRUMENT PANEL SYSTEM COMMUNICATION BUS MALFUNCTION (GND SHORT), DTC B1291 LIGHT SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT), DTC B1292 LIGHT SYSTEM COMMUNICATION BUS MALFUNCTION (GND SHORT) .