VALVE AS 4449544 - Caterpillar

Issue
The "ARD Nozzle Heater Circuit Test" used in CAT ET requires the coolant temperature to be above 60° C (140° F). When running this test on a cold machine, a significant amount of time is needed to achieve this threshold.Resolution
The coolant temperature threshold has now been removed from the "ARD Nozzle Heater Circuit Test".Issue
Aftertreatment Regeneration History data is not being sorted properly. In some rare cases, the regeneration history file will fail to download.Resolution
When using CAT ET 2011B or newer, the aftertreatment regeneration history will now be sorted in the proper order. The issue of the regeneration history file not successfully downloading as also been corrected.Issue
When the 2489-7ARD Air Pressure Control Actuator : Not Responding Properly code goes active during a regeneration, the regen will not stop. The problem can cause the ARD fuel system to provide incorrect amounts of fuel, potentially damaging the DPF.Resolution
When a 2489-7 is generated during a DPF regeneration, the regeneration will terminate.Issue
In cold ambient conditions, condensation can possibly collect in the pressure lines connected to the DPF delta P sensor. This condensation can freeze and cause 2458-2 DPF #1 Differential Pressure Sensor : Erratic, Intermittent, or Incorrect faults or 2458-13 DPF #1 Differential Pressure Sensor : Out of Calibration faults.Resolution
A new strategy has been implemented to disable the diagnostics when pressure line freezing is probable. The new strategy also disables the delta P signal from influencing DPF soot load percent. This strategy uses inputs from the intake air temp sensor and DPF inlet temp sensor to determine when to activate and deactivate this strategy.Issue
DPF Regeneration Intervals can be negatively impacted in cold-weather operation due to situations where the engine runs for extended periods of time on the white smoke map. The situation can increase the soot rate out of the engine filling up the DPF more quickly in some high speed, light load applications.`Resolution
The NRS flow rate has been reduced when operating on the white smoke map in order to lower soot rate out of the engine.Issue
140M2 and 160M2 motor graders do not allow for engine speed setting when the throttle lock is in manual mode and the service brake is depressed. This circumstance can be undesirable in some situations where engine speed needs set when machine is on a slope and the brakes are depressed.Resolution
Engine speed setting with throttle lock in manual mode can now to be set with service brakes depressed.Issue
D6T, D7E and D8T Track Type Tractors can fail a key off regen if the regen is attempted when the soot load is less than 30%. This situation is due to a communication that is between two layers within engine software.Resolution
Communication between the two software layers has been improved. Now the key off regens will be performed successfully when the soot load is below 30%.Issue
If the "DPF regeneration force" switch or "DPF regeneration inhibit" switch is physically locked in the depressed state or is shorted, there is no indication to the engine ECM that this input is bad.Resolution
Diagnostic codes have been