WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
The CMP sensor detects the position of the No. 1 cylinder as a reference for sequential fuel injection to each cylinder.
Fig 1: Identifying Sectional View Of Camshaft Position (CMP) Sensor