Coolant pressure sensor
The refrigerant pressure sensor for the air conditioning system is located in the pressure line of the refrigerant circuit. In the cooling mode the refrigerant high pressure is picked via the pressure sensor are evaluated in the DME.
| Index | Explanation |
|---|---|
| 1 | Coolant pressure sensor |
| 2 | 3-pin plug-in connection |
The refrigerant pressure sensor is supplied with 5 Volts and ground by the DME. The information is sent to the DME across a signal cable. The signal fluctuates depending in the pressure. The measuring range of approx. 0.1 to 0.9 Volts corresponds to a pressure of approx. 10 kPa (0.1 bar) to 3.5 MPa (35 bar).
The DME can use the signal of the pressure sensor and the stored characteristic map to calculate the pressure in the pressure line of the refrigerant circuit and, depending on requirements, switch the electric fan on or off.
The signal for switching the compressor clutch on or off is also sent across the PT-CAN to the junction box electronics (JBE).