No fuel no spark, engine cranks

[Drain]

I have a 95 sc400 that I have rebuilt; broken valve engine will crank and I am sure my grounds are all good. The spark plugs have no spark on either bank and I do not hear the fuel pump engage at all. Starter will crank the engine but it will not fire. The only wiring I have done to the vehicle is wiring in electrical fans to the ign switch. Where should I start to fix this problem? I have no CEL so I wonder if it is the ecu.

 

[P Bateman]

If the CEL isn't lighting up, then the ECU isn't switching on... or is malfunctioning.

Start with the basics in order - battery - fuse - ECU - earth
Ensure you have +B constant (BATT terminal)
Ensure you have +12V with the ignition switch turned on (IGSW terminal, +B and +B1)
Check all the ECU grounds have good connection to ground

 

[Drain]

If the CEL isn't lighting up, then the ECU isn't switching on... or is malfunctioning.

Start with the basics in order - battery - fuse - ECU - earth
Ensure you have +B constant (BATT terminal)
Ensure you have +12V with the ignition switch turned on (IGSW terminal, +B and +B1)
Check all the ECU grounds have good connection to ground

Thanks for the advice Bateman. I found out the ecu wasn’t completely plugged in with the harness (don’t let your friends plug in your ecu)
CEL came on and I was able to diagnose cam sensors and crank sensor. Got it on order right now