Automatic control (selection using SIDC, CUSTOMIZE)

Heating takes place when the engine is started and the criteria for heating are satisfied. Heating is temperature controlled and has three output settings. The ACC module is factory programmed in AUTO to run to output setting 2. Depending on the outdoor and compartment temperatures, the ACC module can engage a higher output if necessary. It is possible to manual select between the three different output settings by pressing the button, the output is then stepped to the closest lower output setting.

ACC will activate the relay if the ambient temperature is lower than 15°C (bus information from BCM) and the temperature of the seat is lower than 20°C, whereby the heating pads will be supplied with current and provide full effect until the temperature reaches a certain value when the relay will be deactivated and the heating turned off.

When the temperature in the seat reaches the cut-out temperature, which depends on the power setting, the relay will be deactivated and the heating turned off.

Once the temperature has dropped to the cut-in temperature, which depends on the power setting, the relay will be activated until the temperature has once again reached the cut-out temperature, when the relay will be deactivated again. This maintains a temperature between the cut-in and cut-out temperatures, which are dependent on the selected heater power.

The seat heating is switched off and the symbol goes out if the automatic system does not want the heating active for 2 minutes or that the heating as been on for 30 minutes.

The passenger and driver's seats are activated under the same conditions, except that the symbol for passenger heating is not switched on before a passenger sits in the seat. If a passenger does not sit in the seat the seat heating will be switched off as soon as the sensor value has reached the control value.