C6.6 Generator Set Caterpillar

The C6.6 engine can have a digital input that uses a Pulse Width Modulated (PWM) signal, an analog input or an input that is provided through a communications port (J1939 Torque Speed Control (TSC1)). The Electronic Control Module (ECM) must be programmed for the type of input that is being used. With certain types of primary input, a second input may be available.

The input is set up using the electronic service tool. From the menu, select "Services". On the "Services" screen, select "Throttle Configuration". Select the type of input from the following list:

• Analog throttle

• PWM throttle

• Communications port throttle (J1939 TSC1)

Illustration 1	g01785156
Typical Range of Throttle (1) Lower Diagnostic Limit (Default=5) (2) Lower Position Limit (Default=10) (3) Initial Lower Position (Default=20) (4) Lower Dead Zone % (Default=5) (5) Upper Dead Zone % (Default=5) (6) Initial Upper Position (Default=70) (7) Upper Position Limit (Default=85) (8) Upper Diagnostic Limit (Default=90)

PWM inputs and communications port inputs do not require any additional programming. If an analog input is selected, the following parameters must be programmed into the ECM.

Lower Diagnostic Limit

This is the minimum throttle percentage that should be detected by the ECM in normal operation when the pedal is in the "off" position. A value below this limit will generate a short circuit diagnostic code. The range of this diagnostic detection area is from 0 percent to the programmed value for the lower position limit.

Table 1

Range	Default
0 to 100 percent	0 percent

Upper Diagnostic Limit

This is the minimum throttle percentage that is detected by the ECM in normal operation when the pedal is in the maximum position. A value above this limit will generate an open circuit diagnostic code. The range of this diagnostic detection area is from the programmed value of the upper position limit to 100 percent.

Table 2

Range	Default
0 to 100 percent	0 percent

Lower Position Limit

This is the minimum throttle percentage that will be interpreted by the ECM as zero throttle. This parameter is used with the value of initial lower position limit to make an allowance for manufacturing tolerances between different pedals.

Table 3

Range	Default
0 to 100 percent	0 percent

Upper Position Limit

This is the maximum throttle percentage that will be interpreted by the ECM as full throttle. This parameter is used with the value of the initial upper position limit to make an allowance for manufacturing tolerances between different speed demand input devices.

Table 4

Range	Default
0 to 100 percent	0 percent

Initial Lower Position Limit

This is the maximum throttle percentage that will be interpreted by the ECM as zero throttle. This parameter is used with the value of the lower position limit to make an allowance for manufacturing tolerances between different speed demand input devices.

Table 5

Range	Default
0 to 100 percent	0 percent

Initial Upper Position Limit

This is the minimum throttle percentage that will be interpreted by the ECM as zero throttle. This parameter is used with the value of the upper position limit to make an allowance for manufacturing tolerances between different speed demand input devices.

Table 6

Range	Default
0 to 100 percent	0 percent

Lower Dead Zone

This is a throttle range above the initial lower position limit before the engine will increase in rpm.

Table 7

Range	Default
0 to 100 percent	0 percent

Upper Dead Zone

This is a throttle range that is below the initial upper position limit that does not allow the engine speed to increase.

Table 8

Range	Default
0 to 100 percent	0 percent