You should always lift the hood and remove the negative
Battery Cable from the remote post to service the HVAC pressure switch. Following, unplug the wire harness connector from the HVAC pressure switch, as a little pressure can come out, but you're not required to release the refrigerant. Turn the banjo switch counterclockwise using a 14 mm open-end wrench to remove it. On the discharge line fitting, attach the HVAC pressure switch and tighten it to 6 Nm (50 in. lbs.). Use the wire harness plug to link the HVAC pressure switch again and next, push the negative battery cable back to the remote battery post.