DTC B1071: Internal SDM Fault
DTC Will Set when
An internal SDM fault is detected by SDM.
Be sure to perform Air Bag Diagnostic System Check before starting diagnosis according to the following diagnostic procedures.
DTC B1071 can never be cleared once it has been set.
DTC Troubleshooting
1) Ignition switch OFF.
2) Replace SDM referring to SDM Removal and Installation .