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Home >> Porsche >> 2000 >> Boxster Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DME 7.2 - 911 CARRERA & BOXSTER >> DTC P1457: A/C Compressor Control - Below Limit >> 170 A/C Compressor Control - Below Limit >> Function

170 A/C Compressor Control - Below Limit: Function

The magnetic clutch of the A/C compressor is supplied with battery voltage via a relay.

The coil of the relay is supplied with battery voltage via the DME relay on one side and connected to ground via the DME control module on the other side. Only the wire from DME control module, pin II/18, to the A/C relay, terminal 85, is monitored during diagnosis.

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