volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

A/C Signal|Testing and Inspection > < A/C Pressure Sensor
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A/C Signal: Description and Operation
A/C Switch

Used by the fuel injection ECU:

The A/C relay sends a signal to the ECU when the relay is engaged (A/C switch is turned on). The relay is located behind the A/C switch. 

A/C Signal|Testing and Inspection > < A/C Pressure Sensor