17953-921-010 Honda GUIDE, CHOKE KNOB (Honda Code 0283572).

Introduction
ReferenceRefer to Electronics Application and Installation Guide, LEBH4623-02 for more information.Do not perform any procedure that is outlined in this publication until you understand the information that is contained in this document.The Service Manual and the Parts Manual that is available for the standard engine should be used if the service information is not in this supplementary product support literature.Required Parts
Table 1
Part Number     Sales Model    
426-2718 Engine Ratings Electronic Software Gp     C11    
356-4766 Engine Ratings Electronic Software Gp     C15    Procedure
Engine Speed Droop
Illustration 1 g02142376
Droop and HSG slopes are equal.
Illustration 2 g02142377
Isochronous droopEngine speed droop is the variation of the engine speed as load is applied. When the load reaches the torque limit curve of the engine, the engine will lug backward along the curve. Note: Values of droop can be assigned to the PWM accelerator or the level input. Also, the value of droop can be assigned to the TSC1 speed demand over J1939. Droop does not apply to the PTO mode. The PTO mode always operates at a zero percent droop.High Speed Governor (Governor Runout)
Under light load conditions, the maximum engine speed is determined by the lower speed of the following:
High idle speed
"Top Engine Limit" x (1 + "Droop percent"/100)Under higher parasitic loads, the maximum actual engine speed may be less than the above listed values. The range of possible idle speed is defined by the High Idle Lower Limit (HILL) and the High Idle Upper Limit (HIUL). High idle cannot be given a value that is less than the Rated Speed (RS). The HIUL is dependent on the mechanical limits of the engine.Installing the Software
Flash 356-4766 Engine Ratings Electronic Software Gp for C15 Engines or 426-2718 Engine Ratings Electronic Software Gp for C11 Engines into the Electronic Control Module (ECM). Configure one of the features of speed control (the PWM throttle or the TSC1 speed control over J1939) to enable the functionality of the droop operation. Refer to Electronics Application and Installation Guide, LEBH4623-02 for information on configuring the speed control. Refer to Table 2 for the recommended parameters for the customers that must share loads.
Table 2
Recommended Settings    
Parameter     Setting    
Top engine limit     2100 rpm    
Low Idle Speed     700 rpm    
High Idle Speed     2310 RPM    
Throttle Position Sensor     Installed    
Throttle Input Low Idle Duty Cycle Setpoint     10%    
Throttle Input High Idle Duty Cycle Setpoint     80%    
Engine Governor Primary Mode Configuration     Speed Control    
Run Out Control     OFF    
Runout Speed Droop     OFF    
Droop Percent     10%    
PetroDroop Install     ON    Note: The recommended "droop percent" is 10%. The "droop percent" can be adjusted from 1% to 10%. A setting below 10% will affect the ability of the engine to loadshare equally.
Illustration 3 g02142242
Default configuration
Illustration 4 g02142332
Recommended Configuration
The following values must be configured in the Caterpillar Electronic Technician (ET) before using a PWM TPS.
The "Throttle Position Sensor" is programmed to "Installed" (1) .
The "Throttle Input Low Idle Duty Cycle Setpoint" has a default of 10. The recommended "Throttle Input Low Idle Duty Cycle Setpoint" value is 10. A range of 10 to 40 is available.
The "Throttle Input High Idle Duty Cycle Setpoint" (2) has a default of 90. The recommended "Throttle Input High Idle Duty Cycle Setpoint" value is 80. A range of 50 to 90 is available.
If the 356-4766 - 99 for C15 or the 385-6102 - 97 or 385-6102 - 99 for C13 software is currently installed on the engine, use the following steps in order to clear the memory of any default settings.
Flash the ECM with the 356-4766 - 00 or 426-2718 - 00 PSO software.
Program the default values for the "Droop Percent" and the "Petro Droop Install".
The ignition switch must be cycled in order to set the change.