Test No. 8: Switch Circuit Communication Problem
If code sets when switch is operated, check switch continuity. If code sets when switch is not operated, switch is sticking. Check switches in order listed after each DTC. If switches are okay, check applicable wiring and connectors. See WIRING DIAGRAMS . Repair as necessary.
- B1221/21 DRIVER'S DOOR POWER WINDOW SWITCH. Check driver's door power window switch. See POWER WINDOWS - GS300 & GS400 article.
- B1222/22 DRIVER'S DOOR LOCK SWITCH. Check driver's door lock switch, lock cylinder lock/unlock switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1223/23 PASSENGER'S DOOR POWER WINDOW SWITCH, Power window switch. See POWER WINDOWS - GS300 & GS400 article. Check door lock control switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1224/24 PASSENGER'S DOOR LOCK SWITCH. Check passenger door lock switch, lock cylinder lock/unlock switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1225/25 RIGHT REAR DOOR POWER WINDOW SWITCH. Power window switch. See POWER WINDOWS - GS300 & GS400 article. Check door lock control switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1226/26 LEFT REAR DOOR LOCK SWITCH. Check power window switch. See POWER WINDOWS - GS300 & GS400 article. Check door lock control switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1241/41 BODY NO. 1 ECU SWITCH CIRCUIT (TRUNK RELEASE). Check trunk release switch, trunk lock cylinder lock/unlock switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
- B1252/52 BODY NO. 2 ECU SWITCH CIRCUIT (STOPLIGHT). Check stoplight switch. See CRUISE CONTROL SYSTEMS - EXCEPT ES300, LX470 & RX300 article.