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Idle Parameters
Fast Idle Engine RPM #1 & #2
Description:
With the installation of a momentary contact Fast Idle
switch, the driver can toggle the switch and the engine
will go immediately to a preset RPM value.
The available RPM values are stored as the Fast Idle
Engine RPM #1 or Fast Idle Engine RPM #2 parameters.
The ranges for these two parameters are listed below.
The engine will increase from the programmed Low Idle
to the Fast Idle Engine RPM #1 value when the Fast Idle
switch is fi rst pressed and released. The second time
the Fast Idle switch is pressed and released, the engine
will increase to the Fast Idle Engine RPM #2 value. After
pressing the Fast Idle switch a third time, the engine will
return to low idle, and Fast Idle will be disabled.
The difference between the Fast Idle Engine RPM #1
and #2 parameters is that the #1 parameter can be
overridden by the operator, whereas the #2 parameter
cannot be overridden beyond the programmed value.
To override the Fast Idle Engine RPM #1 parameter, the
operator should press the accelerator pedal until the
desired rpm is reached, and then depress the Fast Idle
Enable switch. This rpm will then be the Fast Idle Engine
RPM #1 value as long as the ECM is powered.
Available:
Pre EPA’07: 3126E, C7, and C9 medium duty engines
EPA’07: All On-Highway Engine Platforms
Range:
Engine
Fast Idle
Engine
RPM #
Range
Cat
Default
Minimum Maximum
3126E, C7,
C9
1 700 RPM TEL RPM 1000 RPM
2 700 RPM TEL RPM 0 RPM
2007 C13,
C15
1 600 RPM TEL RPM 1000 RPM
2 600 RPM TEL RPM 0 RPM
Advantages:
Setting the Fast Idle Engine RPM can help reduce work
cycle time by reducing the time it takes to get the engine
up to the preferred RPM.
Recommendations:
✔ This programmable feature is application
dependent and should be programmed based on
customer specifi c requirements.