When the position sensor 12 is operating normally, the reference position signal REF is output at {TAIL ~ BTDC 110°} by detecting the first pulse of the cam sensor 18 and counting the number of position signals POS10, e.g., counting 12 pulses of {HEAD ~ position signal POS10} 
When the position sensor 12 is operating normally , the reference position signal REF is output at { TAIL ~ BTDC 110 ° } by detecting the first pulse of the cam sensor 18 and counting the number of position signals POS10 , e.g. , counting 12 pulses of { HEAD ~ position signal POS10 }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD