Detection block (trigger) camshaft position sensor (CMP) located in the intake camshaft on L3 engines (with a variable valve timing mechanism).
Pic. 2.22. Mazda 3 engine camshafts: 1 – a cam-shaft of a drive of inlet valves; 2 – a cam-shaft of a drive of final valves; 3 - emphasis; 4 - working protrusion of the cam; 5 – a basic neck of a cam-shaft; 6 - the lower part of the cam; 7 - protrusions for camshaft position sensors; 8 - special device
The timing groove for the TDC of the first cylinder is located at the rear of the intake and exhaust camshafts (pic. 2.22).