have you checked the relay base for good contacts as they us captured spade connectors and the contact area is very small and they have a tendency of being pushed back in the holder .the relay you have are they a well known manufacture and check to see if they are diode or resistor types
Have you confirmed that relay 9 is working ok ,have you battery voltage on c123-1 and c605-3 on the inertia switch to ground .
and as mentioned by sierrafery the engine is not being immobilised