"We have Toyota ipsum 3sfe motor The cam belt was supposedly replaced but the oil seals were not. The teeth on the belt pulled off and put the timing out. Being a non interference motor fitting the belt is no problem but the no 1 cylinder TDC could be one turn of the crankshaft out relative to the spark. It has electronic ignition. With no distributor it is difficult to set up. There is a sensor detecting something on the the crankshaft toothed pulley
Car is an Ipsum 3s fe motor on 1996 Toyota Camry
Crank on top dead center Don't confuse yourself ,#1& #4, are both at TDC at the same time It's the cam mark that needs to be correct.