The reason to my understanding thatt you can't do it on a 1500 truck is that there is no PTO on the transmission or the tranny isn't capable of having one so no program is in the PCM to activate. 2500 and 3500 have the heavy duty tranny with the option of a pto and therefore can enable this function

 

ah I could do this then??

 

Pulled this off a cummins forum:

“NOTE : An optional driver-controlled high idle speed is available on automatic transmission equipped vehicles with speed control. This feature allows the driver to select an elevated idle speed between 1,100 and 1,500 RPM’s. Your Dealer can enable this feature.”

I would give you a screenshot but the document is not on tech-connect yet.

AND FOR THE MANUAL TRANSMISSION GUYS. THIS IS A STAR-ONLINE FILE
It’s from a general search, Not sure if it applies to pickups, but the part is referred to in the PTO enable instructions on Cab & Chassis on the DodgeBodyBuilders instructions.

Search Result
Case Number K67915415
Vehicle Issue The customer would like to have the 'idle-up' feature enabled on a manual transmission equipped truck.;The 'idle-up' feature can be enabled using StarSCAN®, but will not function until a clutch "up-stop" or start-of-travel switch is installed.
System or Component Mopar Accessory / Performance Part,Need Information Concerning Proper Part Usage,Programming / Flash;Speed Control
Recommendation Install clutch up-stop switch P/N 05026273AB. This switch is also called the "Switch - Clutch Interlock / Upstop". Most trucks do not have the 6-way connector included in the dash wiring harness. The two wires are un-terminated. The matching connector for use with the switch is P/N 05102412AA. This connector is not included with the switch kit and must be ordered seperately.
Modification Date 05/14/08 4:19 PM

For a full view of the STAR Online case, copy the case number above and use it to look up the complete case in the STAR Online application.


AND FOR THE CAB & CHASSIS GUYS, THIS IS RIGHT OFF THE Official Dodge Site - Body Builder's Guide site (You can go there too , but I’ll print here for you).
Note: I printed the 2007 instructions , the 2008 instructions do not mention the clutch switch


3500 Chassis Cab Adjustable Idle Speed Instructions
09/10/2006
Idle Up Feature (Adjustable Idle Control)
This is a only feature and is NOT available on any vehicle equipped with a 5.7L
gas engine.
Idle up (Adjustable Idle Control) is available when PTO is enabled on the vehicle by
purchasing the PTO prep option (sales code LBN) or by having the Dealer enable the
feature. It has been developed to aid in cabin heating / cooling or enhance stationary PTO
capability by elevating the idle speed upon operator command through the steering wheel
mounted cruise switches.
If the vehicle was purchased without PTO prep (sales code LBN) and the Idle Up feature
is desired, your Dodge Dealer can enable this feature provided the vehicle has the
required hardware and software.
Vehicle Required Hardware/Software
If the vehicle is equipped with an automatic transmission:
• Original equipment cruise switches
• PTO enabled (by purchase of prep package or by Dealer)
If the vehicle is equipped with a manual transmission
• Original equipment cruise switches
• Clutch up-stop switch wired to the PCM
• PTO enabled (by purchase of prep package or Dealer)
This feature cannot be Dealer enabled for manual transmission equipped vehicles
NOT ordered with the PTO prep package. This is due to the required up-stop
switch. At this time there is no Mopar parts kit to add this switch.
Operation:
Pre-engagement vehicle requirements:
1. The vehicle must be in Park (automatic transmission).
2. Vehicle speed must be less than 2 mph (manual transmission).
3. Brake pedal must not be depressed.
4. Clutch pedal is not depressed
5. Parking brake must be set for manual transmission
6. No active speed or engine faults present (MIL lamp on)
To engage, the operator first presses the “Cruise On” cruise control switch. The Cruise
light will come on in the cluster. Then press and release the “Set” switch (just like you

2007 3500 Chassis Cab Adjustable Idle Speed Instructions
would do when operating the cruise control feature). This will activate the feature and set
the engine idle speed to 900 rpm’s.
At this point the operator may choose to “ramp” up or down the idle speed. To ramp up,
press and hold the RES / ACCEL (right hand side) cruise switch. Maximum idle speed
(while feature is active) is 2000 rpm’s. At any point while the idle speed is ramping up
the operator may release the RES / ACCEL switch and the idle speed will stabilize at the
value shown on the tachometer.
To ramp down the procedure is the same as when ramping up except, that the operator
will press and hold the COAST cruise switch. Minimum idle speed (while feature is
active) is 900 rpm’s.
When the Idle Up feature is engaged it can be disabled (turned off) by several ways:
1. The cruise cancel switch can be pressed.
2. Cruise off switch can be pressed.
3. Vehicle brake pedal can be depressed.
4. Move the PRNDL (gear select lever) from Park
5. Vehicle speed greater than 2 mph (manual vehicle only)
6. Clutch pedal is depressed.
When this feature is disabled from any method then the idle speed will revert back to the
standard vehicle idle speed. The cruise lamp will stay on until the cruise off switch is
pressed even though the Idle Up feature has been disabled.
The Idle Up feature is the lowest priority between it and PTO operation. If at any time
during active Idle Up the PTO on/off switch is activated the control will be given over to
the PTO feature. For example, if the idle up is active and the idle speed has been set to
1400 rpm’s and then the PTO on/off switch is activated the idle speed will return to 900
rpm’s (Stationary PTO mode). If all conditions are met to engage the PTO, the idle up
feature can then be used to ramp up the idle speed again to the desired level.
If any of the disable conditions are met, the PTO switch must be cycled off then back on
before the Idle Up can be used again.

 

Just looking through the 05 service book

Quote:

SWITCH - PTO

DESCRIPTION
This Powertrain Control Module (PCM) input is used only on models equipped with aftermarket Power Take Off (PTO) units.

OPERATION
The input is used only to tell the PCM (or ECM-Diesel) that the PTO has been engaged. The PCM (or ECM) will disable (temporarily shut down) certain OBD II diagnostic trouble codes when the PTO is engaged.

JTEC and NGC Engine Controllers: When the aftermarket PTO switch has been engaged, a 12V + signal is sent through circuit G113 to PCM pin A13. The PCM will then sense and determine that the PTO has been activated.

CM 845 or CM 848 Diesel Engine Controllers: When the aftermarket PTO switch has been engaged, a 12V + signal is sent through circuit G113 to ECM pin B38. The ECM will then sense and determine that the PTO has been activated.

And the 05 Body Builder stuff

Quote:

PTO and ODB II
2005 Dodge Ram trucks, except 3.7L powertrain options,
have a provision that allows ODB II monitoring systems to
be disabled while the PTO system is being operated. This
will prevent “false” lighting of the “Check Engine” lamp due
to the engine-PTO driven accessories.

For gasoline applications, ODB II monitoring is disabled by
applying a 12-volt ignition feed to circuit G113. This circuit
is provided in the engine harness as a “splice” point at the
left hand, rear corner of the engine. Approximately five
inches of an orange 18 gauge is folded back and taped.
To aid in identification, a white plastic tag is attached to
this wire and is labeled “PTO”.

And all I could find on the opperation is from 2007

Quote:

The customer will have the ability to operate the PTO in either a “stationary” or “mobile” mode. The vehicles will be factory set to the “stationary” mode. In order to select the “mobile” mode a Chrysler Group LLC Dealership is required to modify the vehicles settings using their proprietary Dealer service tool.

Stationary Mode
To operate the PTO in this mode the vehicle must meet the following conditions:
• Be in “park” position ( vehicles equipped with automatic transmission)
• Upfitter provider (on/off) switch has been activated
• Parking brake applied (vehicles equipped with manual transmission)
• Vehicle must be running
• No vehicle, brake or clutch switch faults present
• PTO must be correctly installed using the vehicle provided circuits
The customer has the choice to operate the PTO by utilizing the cruise control switches or by utilizing a remote control (provided by the PTO supplier). To operate the feature using the cruise control switches the customer must first activate the up fitter provided on/off switch. Next, the cruise control “on” switch is selected. Following this step the “set” switch must be depressed. The vehicle is now in the PTO mode and is ready for use. In order to increase or decrease the engine idle speed, to optimize the PTO function, the “accel” and “decel” cruise switches can be used respectively.
To disengage PTO operation and return to “standard vehicle operation” simply turn the
up fitter provided on/off switch to the off position.

I'm going to power up that PTO wire and see what it does on my 05.