15AMP EFI Main fuse -> MAIN EFI RELAY -> B/B1
1 - Check that the 15amp fuse gets 12v
2 - check fuse works
3 - check that MAIN EFI RELAY 12v feed comes live with the 15amp fuse in
4 - Check that when the ignition is turned on that the main relay sends this
. 12v Feed to the ecu side of the relay wiring in the fusebox.
If the 12v gets sent to the other pin, but B/B1 dont come live then its just a broken wire.
If the relay doesnt switch, its a bad relay or the ignition circuit needs testing.
Otherwise its basic continuity checking of the feed.
