Here is a Start
7.1 ENGINE NOT STARTING
Is the engine cranking when key is in start position? YES
Is MIL lamp ON in instrument cluster NO
1) Ensure diesel fuel is present in the fuel tank 2) Ensure there is no leakage in the fuel system 3) Ensure in-tank fuel pump & relay are working 4) Ensure no air is present in the fuel system, bleed fuel system if required 5) Ensure intake air heater is heating up 6) Ensure there is no visible fuel contamination 7) Ensure air filter is not clogged 8) Ensure main relay is functioning 9) Ensure diesel fuel injectors are functioning as per spec.