If {TAIL ~ the catalyst temperature} is above {HEAD ~ the first temperature threshold T1} at 202, then the routine proceeds to 204 
If { TAIL ~ the catalyst temperature } is above { HEAD ~ the first temperature threshold T1 } at 202 , then the routine proceeds to 204
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH