B1143

DTC B1143: Door Multiplex Control Unit Internal Error (EEPROM error)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Clear the DTCs with the HDS.
2. Disconnect the door multiplex control unit connectors and wait for 2 seconds.
3. Reconnect the connectors to the door multiplex control unit,
4. Turn the ignition switch OFF, and then back ON (II).
5. Check for DTCs with the HDS.

Is DTC B1143 indicated ?

YES - Check connections. If OK, replace the door multiplex control unit.

NO - The system is OK at this time. Check the battery and charging system.