Accessory Drive - Overview (G1550512): Overview
WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.
The engine crankshaft pulley drives the accessory components, which comprise the generator, the coolant pump, the power steering pump and the A/C (air conditioning) compressor.