How cold A/C?

[Lablanca2019]

That may be the reason for not seeing the FCIM module. Forscan web site recommends the OBDLink EX USB adapter.

https://www.obdlink.com/products/obdlink-ex/?ref=forscan

Currently 87 degrees ambient these are my current numbers.. truck up to temperature doors closed fan speed max in recycle mode center vent temperature 60 degrees

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[Lablanca2019]

Doing a little experiment Pressure dropping when I added fan but vent temperature only dropped a few degrees with fan speed max

 

[airline tech]

Yes - it may be the adaptor - but I am not certain that Forscan has the PIDs for the FCIM, Forscan is limited for PID display.
And for the display - I think the AC Demand = Switch (On) - its not the clutch (engaged) there is another PID for that - and it should be labeled (specific) for the clutch.

Plus: There is a (Long List) of PIDs for - AC Clutch Is Inhibited - due to (X) = True/False but I do not know if Forscan will display them

Now:
At 87 deg
High Press Range - 190 - 230 PSI
Low Press Range - 32 - 50 PSI

You fan test - dropped the High Pressure - down closer to normal range
What did the - Low Side pressure do - with added fan?
As an (alternate method) EVAP Temp - hit the (Larger Line) with a digital thermometer at the firewall - this is the suction (Low Side) line (Evap Exit)

 

[Lablanca2019]

Yes - it may be the adaptor - but I am not certain that Forscan has the PIDs for the FCIM, Forscan is limited for PID display.
And for the display - I think the AC Demand = Switch (On) - its not the clutch (engaged) there is another PID for that - and it should be labeled (specific) for the clutch.

Plus: There is a (Long List) of PIDs for - AC Clutch Is Inhibited - due to (X) = True/False but I do not know if Forscan will display them

Now:
At 87 deg
High Press Range - 190 - 230 PSI
Low Press Range - 32 - 50 PSI

You fan test - dropped the High Pressure - down closer to normal range
What did the - Low Side pressure do - with added fan?
As an (alternate method) EVAP Temp - hit the (Larger Line) with a digital thermometer at the firewall - this is the suction (Low Side) line (Evap Exit)

Will do this in the morning thank you very much for the continued assistance

 

[airline tech]

Questions:
Is that (Low Pressure) gauge for 134 or 1234?
When the system was charged was it filled to spec on the label?

If you did not reduce the amount of 134 - (adjusted) due to different properties and your high (High Pressure) the system may be overcharged.

The 134 charge - should be about 20 oz's - so about 4 oz's less than the sticker (approximated guess) via google search for conversions to 134 from 1234

Remember we have a Variable Compressor and that may be generating the - Low Side pressure, not the actual charge.

So for me - the issue is (1) of the 2 below

1. System Overcharged
2. The Expansion Valve - is delivering improper flow to the Evap - thus restricting it - due to the 134 conversion - its calibrated to see 1234

 

[Lablanca2019]

Questions:
Is that (Low Pressure) gauge for 134 or 1234?
When the system was charged was it filled to spec on the label?

If you did not reduce the amount of 134 - (adjusted) due to different properties and your high (High Pressure) the system may be overcharged.

The 134 charge - should be about 20 oz's - so about 4 oz's less than the sticker (approximated guess) via google search for conversions to 134 from 1234

Remember we have a Variable Compressor and that may be generating the - Low Side pressure, not the actual charge.

So for me - the issue is (1) of the 2 below

1. System Overcharged
2. The Expansion Valve - is delivering improper flow to the Evap - thus restricting it - due to the 134 conversion - its calibrated to see 1234

Was a little tricky getting ir to read what looked like actual temp sur ti hot air circulation but This morning with fan speed at max coolant temp to normal

 

[airline tech]

With that (Temp) - as a general guide - makes me think the Evap is actually getting cold and the next step - which Forscan does not have - is to view the - Temp Door Actuator (position) is it actually driving to (LO) and staying there.
But if the Evap is actually 33.8 Deg or Lower - then the PCM is commanding the compressor clutch to disengage - this is the protection cutoff temp to prevent evap freeze up.

Will it drive (LO) without selecting (Max Ac) ?
Are there any popping sounds - under the dash?


This truly needs a scanner that can see all the PIDs in the FCIM as well as the PCM for the Climate Control System.

Need to see:
The Door Position PIDs - Mode - Temp and Air Inlet
The Temp Sensor's PIDs - EVAP - Panel Discharge - Floor Discharge and Humidity / Temp as well as the Ambient Temp Sensor

Basically - you have 60 deg air from the Vents - We need to know what the actual temp sensors are reporting - as these are being reported to the FCIM

So yes - we need to shift focus to the control side in the climate box.

 

[Lablanca2019]

With that (Temp) - as a general guide - makes me think the Evap is actually getting cold and the next step - which Forscan does not have - is to view the - Temp Door Actuator (position) is it actually driving to (LO) and staying there.
But if the Evap is actually 33.8 Deg or Lower - then the PCM is commanding the compressor clutch to disengage - this is the protection cutoff temp to prevent evap freeze up.

Will it drive (LO) without selecting (Max Ac) ?
Are there any popping sounds - under the dash?


This truly needs a scanner that can see all the PIDs in the FCIM as well as the PCM for the Climate Control System.

Need to see:
The Door Position PIDs - Mode - Temp and Air Inlet
The Temp Sensor's PIDs - EVAP - Panel Discharge - Floor Discharge and Humidity / Temp as well as the Ambient Temp Sensor

Basically - you have 60 deg air from the Vents - We need to know what the actual temp sensors are reporting - as these are being reported to the FCIM

So yes - we need to shift focus to the control side in the climate box.

Sorry with all this going on I forgot to mention if it makes things worse hopefully not.. but the recycle mode was unplugged due to missing foam on the door and a piece of corner missing due to what looked like a rat chewing it.. so they left system in recycle and unplugged the actuator.. no popping sounds when moving temp knob from full cold to full hot

 

[Superspirit]

The recirculation door doesn't control temp. The blend door controls temp.

 

[Lablanca2019]

The recirculation door doesn't control temp. The blend door controls temp.

One thing I have noticed recently is when I remote start with app.. I'll open doors to climate blowing heater level air.. but as soon as I turn key it returns back to cold setting on its own

 

[Superspirit]

One thing I have noticed recently is when I remote start with app.. I'll open doors to climate blowing heater level air.. but as soon as I turn key it returns back to cold setting on its own

Check your remote start settings that is what controls that.

 

[Lablanca2019]

Check your remote start settings that is what controls that.

I confirmed that feature but it is only in the "schedule start" section which I don't use

 

[Superspirit]

It's in the remote start menu in the truck not the app. You can choose what the climate control does on remote start. In the winter I set mine to call for heat. In the summer I set it to last use position.

 

[Lablanca2019]

It's in the remote start menu in the truck not the app. You can choose what the climate control does on remote start. In the winter I set mine to call for heat. In the summer I set it to last use position.

Have xl trim basic radio

 

[RangerBill]

Unfortunately the fcim is empty

I just tried Forscan on my truck and I am unable to read any FCIM PIDs either, even with the recommended adapter. Apparently, Forscan doesn't support reading PIDs on that module.

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