Have you confirmed that the ECU has power and ground (
see diagrams linked previously):
1) System ground, Terminal A1 on the ECU via black/white wire to left top front of engine.
2) System Ground, Terminal A2 on the ECU via tan/white wire to left top front of engine.
3) 12V Ignition On, Terminal E15 on the ECU via pink wire to connection under dash to other pink wires.
4) 12V Battery, Terminal E16 on ECU via orange wire to connection in engine compartment with other orange wires and powered via fuse to underhood fuse/relay center in left rear of engine compartment.
While I quoted the "technical" locations for these wires, I do understand that swaps sometimes result in different locations. Nevertheless, terminals A1 and A2 should have an engine ground, terminal E15 needs a 12V ignition on feed (on when ignition key is on), and terminal E16 needs a 12V fused battery feed (on all the time).