Idle Shutoff Override? 2017 Freight Cascadia

I'm gonna be in a rental for few days next week. It's a 2017 Freightliner Cascadia. It doesn't have an APU , so will have to idle unfortunately. Anyone had to override the engine idle shutoff on one of these? I've already asked to see if it has the Smart Idle or whatever, which will allow the engine to start itself when needed as an APU would. It doesn't. Gonna miss my APU for that time for sure.

APU:

Auxiliary Power Unit

On tractor trailers, and APU is a small diesel engine that powers a heat and air conditioning unit while charging the truck's main batteries at the same time. This allows the driver to remain comfortable in the cab and have access to electric power without running the main truck engine.

Having an APU helps save money in fuel costs and saves wear and tear on the main engine, though they tend to be expensive to install and maintain. Therefore only a very small percentage of the trucks on the road today come equipped with an APU.

Try the following: While parked and idling with cruise control on. Turn cruise off then on again. Then push Res/Accel. If idle jumps one or two hundred rpm, these steps may be your cure.

If that doesn't work flip it into high range and repeat what Bill said.

The directions will be on a sticker on the dash right behind where the Qualcomm mounts. Yup, you start the truck, set brakes, high range neutral, cruise.. idle MGMT light will flash on your dash panel. Have your temp control set where you want it before hand. Leave your key to on position in the ignition. Truck will start on its own and run to maintain the desired temp and shut off when temperature is reached.

Mine will do that​ but idle time gets crazy high. My apu bunk ac isn't working well at the moment so I've played with it a bit lately.

Qualcomm:

Omnitracs (a.k.a. Qualcomm) is a satellite-based messaging system with built-in GPS capabilities built by Qualcomm. It has a small computer screen and keyboard and is tied into the truck’s computer. It allows trucking companies to track where the driver is at, monitor the truck, and send and receive messages with the driver – similar to email.

APU:

Auxiliary Power Unit

On tractor trailers, and APU is a small diesel engine that powers a heat and air conditioning unit while charging the truck's main batteries at the same time. This allows the driver to remain comfortable in the cab and have access to electric power without running the main truck engine.

Having an APU helps save money in fuel costs and saves wear and tear on the main engine, though they tend to be expensive to install and maintain. Therefore only a very small percentage of the trucks on the road today come equipped with an APU.