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You will need CAT ET to test this engine. This machine does not have a way to see the fault codes without it.
Here is a list of things to check form the manual.
Engine Cranks but Will Not Start
Check for active diagnostic codes on the electronic service tool. Troubleshoot any active codes before continuing with this procedure.
Note: Faulty glow plugs will only affect engine starting when the ambient temperature is below 10 °C (50 °F).
Ensure that the repairs have eliminated the active diagnostic codes before attempting to restart the engine.
If the engine will not start proceed to "Fuel Supply".
If the engine will not start proceed to "Low Compression".
Examples of low compression are shown in the following list:
Review these to see if anything is helpful and let me know if I can help you with any?
I just remembered a problem I have had in the past. Check the ??voltage load protection module, it is the little silver cylinder next to the ecm. If it burns out, the engine will crank but, not start.
Here is a schematic of the wires.
270-5322 is the part number of the current version.