FRONT STRUCTURE 6V1677 - Caterpillar

An optional parameter for this screen would be the engine oil temperature.
Here are four possible situations that would not allow the engine to start or to start but not run properly:
Injection Actuation Current is 100% and Actual Injection Actuation Pressure is Low
If the injection actuation current is at 100% and the actual injection actuation pressure is low, there is possibly a leak in the injector or the jumper tube that provides the oil to the injector. The minimum pressure required to enable the injector is approximately 4500 kPa (650 psi) and the normal operating range is 5000 to 21 000 kPa (725 to 3100 psi). The pressure must be 5000 kPa (725 psi) for the engine to start. 1800 kPa (260 psi) is the default value for the sensor.
When inspecting the engine for oil leaks, first check the engine when it is cold by just cranking and not allowing the engine to start. If there are no visible leaks, then run the engine (if it will start) until it reaches operating temperature. Leaks will be much more visible when the oil is warm and under pressure.
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.
First remove the valve covers and disable all unit injectors using an ET service tool, ground level shutdown switch, or by disconnecting the injector wiring in the valve cover base. Then crank the engine and observe each injector and the joints where it connects to the jumper tube. Also check the spill port, which is on the top of older injectors and on the bottom of newer injectors. An oil drip is acceptable, but a pencil-sized flow would be considered a large leak and could prevent the engine from starting. If an injector is leaking from the spill port, the injector should be replaced. If there is a massive leak in the joint between the jumper tube and the manifold, remove the jumper tube, check the seals and replace any seals that are damaged. Then reinstall the jumper tube and torque the bolts. Refer to Special Instruction REHS0116-02 for the complete procedures, specifications and the tools required for removing and installing injectors.
Injection Actuation Current is 100% and Actual Injection Actuation Pressure Is Normal
If the injection actuation current is at 60% to 100% and the injection actuation pressure is normal, there may be a small leak, which is large enough to cause the engine to not run properly. The leak can be made more apparent by performing the injection actuation pressure override test, which will raise the injection actuation pressure.
The engine should be at operation temperature before starting the test. This will make a small leak more obvious. Disable both injectors under the valve cover where you suspect the leak may be and run the engine. Using ET, increase the desired injection actuation pressure incrementally to the maximum vale of approximately 3300 psi. Observe the injectors, the jumper tube connections and the injector spill