Под монитором маленькая крышка, за которой кнопки навигации. Методом проб и ошибок ищем Service, затем Diagnostic
Как известно, диагностика по кодам показывает проблемы с эектроникой-электрикой. Мех. неисправность, как правило, может определиться по косвенным признакам.
Например, если у форсунки нет контакта провода - это код, если заклинила игла - это мех. неисправность и кода нет. Но от этого Вам будет не легче.

И в довесок пошаговая инструкция поиска причины отсутствия залпа. С переводом-то справитесь?

Engine Cranks but Does Not Start
Probable Causes
· Machine faults
· Diagnostic codes and event codes
· Engine speed/timing
· Electrical connectors
· Air intake and exhaust system
· Air inlet heater
· Low-pressure fuel system
· High-pressure fuel system
· Cylinder performance
Recommended Actions
NOTICE Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Machine Faults
Make sure that the Machine Security System (if equipped) is not preventing the engine from starting.
Resolve any faults on the machine that could prevent the engine from starting.
Attempt to start the engine. If the engine will not start, proceed to "Diagnostic Codes and Event Codes".
Diagnostic Codes and Event Codes
Certain diagnostic codes and/or event codes may prevent the engine from starting. Connect Cat Electronic Technician (ET) and check for active codes and/or for logged codes. Troubleshoot any active codes that are present before continuing with this procedure.
Note: If there are any active diagnostic codes for the machine security system, verify that the lamp for the machine security system is illuminated. If the lamp for the machine security system is illuminated, the machine security system is armed. Deactivate the machine security system and try to start the engine.
Note: If a E390 Fuel Filter Restriction is logged and/or active, replace the fuel filters.
Fuel that does not meet the recommendations of Operation and Maintenance Manual, may cause premature fuel filter restriction. If the fuel filters are restricted prior to normal service intervals, investigate the quality of the fuel. Use fuel that meets the recommendations of Operation and Maintenance Manual.
Note: If a E198 Low Fuel Pressure is logged and/or active, refer to the symptom Troubleshooting, "Fuel Pressure Is Low".
Engine Speed/Timing
The diagnostic codes for the engine speed/timing are disabled during engine cranking. The status of the engine speed/timing sensor's can be viewed on the "No Start" screen with Cat ET when the engine is cranking. The diagnostics for the engine speed/timing will be enabled after the engine is running.
If a speed sensor is not detected, refer to the circuit test Troubleshooting, "Speed/Timing - Test".
Make sure that any repairs have eliminated the problem.
Electrical Connectors
Check for correct installation of the J1/P1 and J2/P2 ECM connectors. Check for correct installation of all other applicable connectors. Refer to service Troubleshooting, "Electrical Connectors - Inspect".
Air Intake and Exhaust System
1. Check the air filter restriction indicator, if equipped. Clean plugged air filters or replace plugged air filters. Refer to the Operation and Maintenance Manual.
2. Check the air inlet and exhaust system for restrictions and/or leaks. Refer to Systems Operation/Testing and Adjusting.
Air Inlet Heater
Note: A faulty air inlet heater will only affect engine starting when the ambient temperature is below 10 °C (50 °F).
1. Check the operation of the air inlet heater. Refer to Systems Operation/Testing and Adjusting.
2. If necessary, replace the air inlet heater. Refer to Disassembly and Assembly.