A6: Check Fuse to Relay Continuity

Remove the Engine Management fuse F5.
Measure the resistance between the load side of F5 and pin 3 PI Main relay socket.

Is the resistance < 0.5 ohms?

Yes
Go to A7 A7: Check Injector Circuit Continuity
Replace fuse F5 & PI main relay.

No
Repair the connector EM019/009, EM005/003, pin 3 PI main relay & harness.