Any way to turn off climate control automatically when auto start/stop is active?

[jblc]

Is there any way to set climate control to turn off automatically when auto start/stop is active at a light, and then turn back on when the vehicle restarts again?

When i manually set climate control, it will prevent the engine from shutting down at a light. If i want to allow auto start/stop to turn off the engine, I keep having to turn off CC manually at lights and then turn if back on when moving again

It's become a bit annoying after a few years of this

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[airline tech]

Ref: ASS and CC Interface, I do not see a way to program it to turn off automatically as its part of the FCIM programming (in a ASS) event.
The FCIM remains powered because it still is receiving (ISP-R) input (Ignition Switch Position - Run)
I do not have ASS (Deleted @ Factory) so unsure if there is a menu selectable item in the IPC, but as far as (As-Built) data I do not see it.

Is there a specific reason - you want this option? as this would not be any different than a vehicle without ASS with these exceptions
in Winter- The Electric Pump activates to keep hot coolant flowing through the heater core
In Summer - The AC Compressor Clutch will not be engaged.

I know that the system should reactivate (engine start) automatically if it cannot keep the cabin cooled to the desired setting, so I am assuming that its blowing warm air when the compressor stops and that would be your issue.

 

[Motorpsychology]

There is no need to turn off the Climate Control in traffic. When you are stopped with the Engine shut off by the ASS, the AC compressor also stops turning, and the only thing running is the cabin fan. Once the temp sensor detects that cabin temp has risen a certain amount, the engine restarts turning the AC compressor and charging the battery, even if you are still stopped. The same is true for cold weather; the ASS will restart the engine, warming the coolant for heat and charging the battery. In extremes of temperature, the ASS won't activate at all.
You may be stressing the AC/heating controls by turning the system on & off several times during a trip.

 

[VAMike]

I think he's talking about the fact that the engine will not shut off if the truck decides it needs to run the A/C. If you turn off A/C in this situation, the engine immediately turns off. It would be nice if there was a way to tune how the truck decides whether the A/C needs to stay on but I wouldn't expect Ford to allow that.

 

[Dgc333]

The best way to prevent aggravation from ASS is to disable it all together. Even the EPA is backing off on the requirement for it to be there. It was originally conceived as a way for car manufacturers to get emission exemption credits.

 

[VAMike]

The best way to prevent aggravation from ASS is to disable it all together. Even the EPA is backing off on the requirement for it to be there. It was originally conceived as a way for car manufacturers to get emission exemption credits.

I find it makes a noticeable difference in my MPG, and I don't want to turn it off. EPA is backing off to score political points with the vocal minority driven to irrational rage by the feature.

 

[ControlNode]

Yeah, if you have climate control on it is an input into if ASS can stop, not the other way around, and I don't think there would be any way short of adding your own CAN monitor/injector device to get it to work how you want. Way easier to just disable the ASS and not bother with it, reduced strain on battery, starter, engine and transmission to just not use it. In fact, sounds like the requirement for ASS may go away since the trade offs for the goal are not really worth it.

I find it makes a noticeable difference in my MPG, and I don't want to turn it off. EPA is backing off to score political points with the vocal minority driven to irrational rage by the feature.

I don't like it, I rarely have a light with a long enough stop to matter, and the fact that when I hit a stop sign where I have to stop, but can go as soon as I've stopped, but the engine stops just as I'm starting to release the brake and I have to wait on the restart is really annoying. I just disable it, and the rare times I just catch a red light that I believe will be awhile, I sometime re-enable it there.

 

[VAMike]

I don't like it, I rarely have a light with a long enough stop to matter, and the fact that when I hit a stop sign where I have to stop, but can go as soon as I've stopped, but the engine stops just as I'm starting to release the brake and I have to wait on the restart is really annoying.

sounds like you haven't learned to control it with the brake pedal. ?‍

 

[jblc]

I think he's talking about the fact that the engine will not shut off if the truck decides it needs to run the A/C. If you turn off A/C in this situation, the engine immediately turns off. It would be nice if there was a way to tune how the truck decides whether the A/C needs to stay on but I wouldn't expect Ford to allow that.

Exactly. I do want to keep ASS working -- I don't want to disable it
When sitting at a light for 5 minutes, I do want the vehicle to shut off.
But, it won't shut off if CC is active, so I'm looking to turn CC off automatically when sitting at a light so that the truck wil shut down, and then CC turn back on when i start driving again (as though i pushed the CC power button manually, off and then on again)

In other words, CC is preventing ASS from working properly. I don't need CC on all the time, and am okay with it turning off for a few minutes at a long light so that ASS can activate properly.

 

[jblc]

When you are stopped with the Engine shut off by the ASS....

But this is the issue: the engine does not shut off at all from ASS when CC is active. The engine just keeps running all the time.

 

[jblc]

Way easier to just disable the ASS and not bother with it, reduced strain on battery, starter, engine and transmission to just not use it. In fact, sounds like the requirement for ASS may go away since the trade offs for the goal are not really worth it.

In a high-traffic environment, i really like vehicles shutting off in traffic and not just idling at long lights. Cleaner air is a huge benefit i'm a big fan of (health is important), even at the cost of wear and tear.
Genuine curiosity: has anyone owned a recent (newer) vehicle that incurred damage due to ASS?

 

[airline tech]

Some of the listed inputs for the ASS & CC

1. A/C system is OFF, or there is no change in the A/C system request while the vehicle is stopped
2. If the A/C system is ON, ambient temperature should be less than 35° C (95° F)
3. In-car temperature is steady and no change is requested from the heating or A/C system
4. Max A/C or defrost is not selected
5. Blower fan control is at one speed setting and a speed change request does not occur while the vehicle is stopped

Note: The manuals do not cover the ASS system in detail for T-Shoot, but if you are stating that the ASS system will never (activate) if you have the (CC) on in any position (Auto/Manual) and the only way to get it to activate is by physically turning the CC off, then the ASS system is not working as it should or its not reading sensor inputs correctly.
As the Climate Control should not completely deactivate the ASS (all the time) again its only using the basic input parameters from above but just to see if the CC is causing it:

So, some T-Shoot steps
With CC (ON) and you are stopped - What Color is the ASS (Indicator)? Green or Grey

I also recall that the IPC menu will show a reason for it being Grey, such as Vehicle Charging which is one of the most noted messages (this comes from the BMS system)

So this also touches base on another (possible) and that is tied to what is the battery voltage reading (@ a Stoplight)
as it may be possible that the (Blower Motor) draw is is stopping the ASS from activating and when you turn off the CC, you are turning off the blower motor.
So a BMS reset, may cure the issue or it may just be a bad battery (low charge) parameter due to the BMS system.

Grey = Not all parameters are met to enable ASS

If this is the case - A scan tool will show a long list of PID's related to the ASS System with wording something like - Auto- Start/Stop deactivated due to (?) there is a long list of various inputs (If I remember correctly these are (True/False) PID's, one of these may pinpoint down the reason for your issue.

 

[JACKSMYDOG]

Exactly. I do want to keep ASS working -- I don't want to disable it
When sitting at a light for 5 minutes, I do want the vehicle to shut off.
But, it won't shut off if CC is active, so I'm looking to turn CC off automatically when sitting at a light so that the truck wil shut down, and then CC turn back on when i start driving again (as though i pushed the CC power button manually, off and then on again)

In other words, CC is preventing ASS from working properly. I don't need CC on all the time, and am okay with it turning off for a few minutes at a long light so that ASS can activate properly.

I assume by CC you mean having it set to auto? I know my ASS still kicks in with AC on, but I don't use the auto control option. I set the temp, vents, and fan manually, ASS shuts the motor down when it feels it should.

 

[VAMike]

Exactly. I do want to keep ASS working -- I don't want to disable it
When sitting at a light for 5 minutes, I do want the vehicle to shut off.
But, it won't shut off if CC is active, so I'm looking to turn CC off automatically when sitting at a light so that the truck wil shut down, and then CC turn back on when i start driving again (as though i pushed the CC power button manually, off and then on again)

In other words, CC is preventing ASS from working properly. I don't need CC on all the time, and am okay with it turning off for a few minutes at a long light so that ASS can activate properly.

It should generally turn off if climate control is active. It won't if the set temperature is very different than the cabin temperature. (That is, if it's working hard to heat/cool the engine will stay on, but if you're at about the right temperature it'll shut off automatically for S/S.) On a hot day should be able to avoid the issue by simply turning the A/C off (leaving the fan on). Depending on what dash screen you have, there may be a way to display the reason the S/S isn't stopping; it will display something like "charging" or "outside temperature too high" or "engine on for heating/cooling".

 

[airline tech]

It should generally turn off if climate control is active. It won't if the set temperature is very different than the cabin temperature. (That is, if it's working hard to heat/cool the engine will stay on, but if you're at about the right temperature it'll shut off automatically for S/S.) On a hot day should be able to avoid the issue by simply turning the A/C off (leaving the fan on). Depending on what dash screen you have, there may be a way to display the reason the S/S isn't stopping; it will display something like "charging" or "outside temperature too high" or "engine on for heating/cooling".

This is correct - The ASS is not picking up a input (correct input) from the Climate Control system and or the battery voltage @ at stoplight is dropping down to where it is teetering near the (Vehicle Charging) cutoff parameter and with the Climate Control (Off) and the Blower Motor (Off) you are above that (Charging-Deactivation) parameter, so it is possible that the Climate Control is not the issue and its just the load from the Blower Motor, which with the Climate Control (Off) is taken out of the equation.

So either from the ASS menu or the Scan Tool PID's, should give a direction of what exactly is not allowing activation of the ASS when the Climate Control is on.

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