| Number | X-pin, colour | Description |
|---|---|---|
| X1822 | 3-pin, Natural | Plug connector Rear mixing air actuator |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Sensors (+) | Rear compartment heater/air conditioner |
| 2 | E | Setpoint, mixing air actuator | Rear compartment heater/air conditioner |
| 3 | A | Component ground | Rear compartment heater/air conditioner |