19080-03641 GOVERNOR ASSY, MEC Denso Cross

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below. Problem
Improper fuel injection results in blown combustion seals in the cylinder. The root cause of the failures are exposed injector wires due to the engine harness rubbing. The software currently does not detect the failure, or the software detects the failure but continues to command fuel injection. The fuel injection has resulted in undesired fuel injected into the cylinder with advanced timing.Solution
New software has been developed to address the problem. Several enhancements were programmed into the software that is listed in Table 1.
Table 1
Application     Software    
793F High altitude arrangement     291-5485 Engine Ratings Electronic Software Gp    
793F Low altitude arrangement     397-6107 Engine Ratings Electronic Software Gp    
797F High altitude arrangement     291-5550 Engine Ratings Electronic Software Gp    
797F Low altitude arrangement     397-6106 Engine Ratings Electronic Software Gp    
797B Retrofit     384-7075 Engine Ratings Electronic Software Gp    The features that are designed into the new software and the purposes of the features are listed in Table 2:The software requires a different troubleshooting procedure for -5 Cylinder Injector : Current Below Normal codes. Refer below to ""Troubleshooting the -5 Cylinder Injector : Current Below Normal Code"".Activation of a -5 Cylinder Injector : Current Below Normal affects the pair of injectors that share the supply. Refer to Illustrations 1 and 2 to determine the pairs.Additionally, the injector solenoid test does not provide accurate results for -5 Cylinder Injector : Current Below Normal codes.
Table 2
Feature     Purpose    
If the exhaust temperature differential between the left and right banks exceeds 50° C (90° F), the E278(2) High Exhaust Differential Temperature is activated. The event stays active.     Because the event remains active, multiple repeated logging of the event in the VIMS is prevented. Also, the operator is not distracted by the nuisance of a flashing check engine light.    
The debounce time of the 190-8 Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period was increased.     Prevents multiple repeated logging of the event in the ECM and the VIMS.    
Updated the conditions for sensing the 342-11 Secondary Engine Speed Sensor : Other Failure Mode diagnostic code.     Previously, the condition could only be detected when the camshaft gear was mechanically retarded in relationship to the crankshaft gear. The update includes offset detection during advanced timing.    
Conditions for detecting the -7 Injector : Not Responding Properly diagnostic codes were changed. The logic for injector actuation was also changed.     Increases the service life of the injectors.    
Changed the torque map.     Prevents a false lug condition from reducing power and affecting the ability to shift gears    
Changed the operation of the Valve Open Test (VOT).     The VOT runs automatically every 100 hours in order to measure fuel flow. The fuel injection