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Home >> Saab >> 2007 >> 9-3 2.0T, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Management System, MOTRONIC E9 >> Description and Operation >> Torque control >> Compensation, A/C

Compensation, A/C

The relay for the A/C compressor is controlled by ECM, which also reads the prevailing pressure in the A/C system via the pressure sensor (620). In this way, ECM can calculate the torque that must be added to compensate for the torque taken by the A/C compressor.