FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Master Controller "Y"


Description
The master controller is a value calculated by the control unit which separately activates the left and right outputs (water valves) dependent on the input values (nominal temperature value, interior temperature and outside temperature). The Y-value is also used in the calculation of the flap control.

The value of the master controller is between -25% (cooling) and 127% (high heat requirement).