No fault codes. | The control unit participate in the data bus communication, no faults stored in the control unit. |
Fault code stored. | The control unit participate in the data bus communication, one or more fault codes are stored in the control unit. |
Coded, mounted. | The control unit is coded and mounted. |
Coded, not mounted. | The control unit is coded, but not mounted. |
Mounted, not coded. | The control unit is mounted, but not coded. |