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