Visual inspection
WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
Check piston pin, connecting rod small-end bore and piston pin hole in piston for wear or damage, paying particular attention to condition of small-end bore bush.
If piston pin, connecting rod small-end bore or piston pin hole in piston is badly worn or damaged, replace piston pin, connecting rod and/or piston.