"Idle RPM Limit"

TM 9-2320-312-24-2

Troubleshooting Section

"Idle RPM Limit"

"Idle/PTO Bump RPM"

The "Idle RPM Limit" is the maximum engine rpm in

The "Idle/PTO Bump RPM" determines the

idle mode. The Idle Mode occurs if the engine rpm

increment or the decrement in engine rpm when

is set by using the cruise control on/off switch and

the Accel switch or the Decel switch is briefly

the set/resume switch. Refer to "Idle Vehicle Speed

toggled. The "Idle/PTO Bump RPM" also pertains

Limit". The actual high limit of this parameter is

to the dedicated PTO and idle. If a set speed

determined by the programmed "Top Engine Limit".

has been programmed in parameter "PTO Engine

The lower limit is determined by the programmed

RPM Set Speed", the parameter "Idle/PTO Bump

"Low Idle Engine RPM".

RPM" pertains only to the engine speed control

that is initiated with the cruise control on/off switch.

Programming this parameter to 600 rpm will prevent

If a "PTO Engine RPM Set Speed" has been

the engine from idling at a constant rpm above the

programmed, the "Idle/PTO Bump RPM" does not

programmed "Low Idle Engine RPM".

pertain to the control of the engine rpm that is

initiated by utilizing the PTO on/off circuit.

Table 69

Table 71

Minimum

Maximum

Default

Minimum

Maximum

Default

700 rpm

TEL rpm

TEL rpm

5 rpm

500 rpm

20 rpm

"Idle/PTO RPM Ramp Rate"

"Fast Idle RPM 1"

The "Idle/PTO RPM Ramp Rate" determines the

rate of increase or decrease of engine rpm. This

"Fast Idle RPM 1" determines the fast idle engine

parameter determines rates of increase or decrease

rpm that is controlled by the fast idle enable switch.

in engine rpm for the following functions:

Actuating the fast idle switch will cause the engine

speed to increase to the programmed value.

Accel.

This rpm can be overridden by the operator. To

override the "Fast Idle RPM 1" setting, depress the

Decel.

accelerator pedal until the desired rpm is reached.

Once the desired engine rpm is reached, depress

Resume Idle

the fast idle enable switch. This rpm setting will be

the "Fast Idle RPM 1" until the ECM is shut down.

PTO

Table 72

The parameter can be set to a value between 5 rpm

Minimum

Maximum

Default

and 1000 rpm in one rpm increments.

700 rpm

1000 rpm

TEL rpm

Note: The parameter affects both idle control and

PTO control. The idle mode occurs if the engine

"Fast Idle RPM 2"

rpm is set by using the cruise control on/off switch

and the set/resume switch. The PTO mode occurs

"Fast Idle RPM 2" determines the second fast

if the engine rpm is set by using the PTO on/off

idle engine rpm that is controlled by the fast idle

switch and the set/resume switch.

enable switch. The "Fast Idle RPM 2" is disabled by

changing the parameter to 0.

Table 70

Minimum

Maximum

Default

If the engine is operating at the "Fast Idle RPM

1" setting, actuating the fast idle enable switch

5 rpm/sec

1000 rpm/sec

50 rpm/sec

will increase the engine idle speed to the engine

speed that is programmed in the "Fast Idle RPM 2"

parameter. The fast idle engine rpm will increase if

the "Fast Idle RPM 2" parameter is set to a number

higher than 0. Actuating the fast idle enable switch

for a third time will cause the engine rpm to return to

low idle. The engine rpm changes to "Fast Idle RPM

1", "Fast Idle RPM 2", and low idle rpm at a rate

that is independent of the value that is programmed

in the "Idle/PTO RPM Ramp Rate" parameter.