| Number | X-pin, color | Description |
|---|---|---|
| X3211 | 4 -pin, Black | Connector Automatic air recirculation sensor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | AUC heating supply | Heating and A/C control module |
| 2 | A | AUC sensor signal | Heating and A/C control module |
| 3 | E | AUC sensor supply | Heating and A/C control module |
| 4 | A | AUC heater ground | Heating and A/C control module |