I'm not sure what the hell I'm doing wrong on this one

I can turn off the fans individually using bidi controls so I know they are commanding on/off as they should. I have tried everything under the sun. Its like something else is requesting fans (DTC, trans temp, etc)

Anyone have any tips?

LABELS Fan #1 Turn-on Delay
Parameters Value
{G1203} Type Of Fans Fitted To vehicle Series Parallel Fans
{G0901} Fan #1 Turn-on Temp 226.414063 °F
{G0902} Fan #1 Turn-off Temp 219.171875 °F
{G0903} Fan #1 Turn-on By A/C Temp 32.000000 °F
{G0904} Fan #1 Turn-off Speed 35.000000 MPH
{G0905} Fan #1 Turn-on Speed 30.000000 MPH
{G0906} Fan #1 Turn-on Delay 0.100000 Seconds
{G0907} Fan #1 Turn-off Delay 1.000000 Seconds
{G0908} Fan #1 Minimum On-Time 50.000000 Seconds
{G0909} Fan #1 Run-on temp 235.414063 °F
{G0910} Fan #1 Run-on time 150.000000 Seconds
{G0911} Fan #1 A/C Pressure Enable 215.039063 PSI
{G0912} Fan #1 A/C Pressure Disable 190.039063 PSI
{G0913} Fan #2 Turn-on Temp 233.585938 °F
{G0914} Fan #2 Turn-off Temp 227.328125 °F
{G0915} Fan #2 Turn-on Delay 1.000000 Seconds
{G0916} Fan #2 Turn-off Delay 1.000000 Seconds
{G0917} Fan #2 Minimum On-Time 30.000000 Seconds
{G0918} Fan #2 A/C Pressure Enable 248.046875 PSI
{G0919} Fan #2 A/C Pressure Disable 208.007813 PSI
{G0920} Fan#1 and #2 Both Off 65.000000 MPH




LABELS A/C Disable RPM
Parameters Value
{G0101} A/C Disable RPM 5250.000000 RPM
{G0102} A/C Enable RPM 5000.000000 RPM
{G0103} A/C Disable TPS 100.000000 %
{G0104} A/C Enable TPS 0.000000 %
{G0105} A/C Enable Timer 0.000000 Seconds
{G0106} A/C Auto Recirculation Fan #2 Control

 

Here are my settings... I am wondering if {G0903} Fan #1 Turn-on By A/C Temp 32.000000 °F is causing your issues... BTW are you using dual PCM pins?

LABELS Type Of Fans Fitted To vehicle
Parameters Value
{G1203} Type Of Fans Fitted To vehicle Series Parallel Fans
{G0901} Fan #1 Turn-on Temp 197.023438 °F
{G0902} Fan #1 Turn-off Temp 194.984375 °F
{G0903} Fan #1 Turn-on By A/C Temp 220.015625 °F
{G0904} Fan #1 Turn-off Speed 45.000000 MPH
{G0905} Fan #1 Turn-on Speed 42.000000 MPH
{G0906} Fan #1 Turn-on Delay 5.000000 Seconds
{G0907} Fan #1 Turn-off Delay 0.000000 Seconds
{G0908} Fan #1 Minimum On-Time 30.000000 Seconds
{G0909} Fan #1 Run-on temp 199.976563 °F
{G0910} Fan #1 Run-on time 204.793750 Seconds
{G0911} Fan #1 A/C Pressure Enable 1378.951817 kPa
{G0912} Fan #1 A/C Pressure Disable 861.844886 kPa
{G0913} Fan #2 Turn-on Temp 203.000000 °F
{G0914} Fan #2 Turn-off Temp 201.031250 °F
{G0915} Fan #2 Turn-on Delay 10.000000 Seconds
{G0916} Fan #2 Turn-off Delay 0.000000 Seconds
{G0917} Fan #2 Minimum On-Time 30.000000 Seconds
{G0918} Fan #2 A/C Pressure Enable 1723.689772 kPa
{G0919} Fan #2 A/C Pressure Disable 1385.684980 kPa
{G0920} Fan#1 and #2 Both Off 46.000000 MPH

 

Yeah, I sure am, by setting the auto recir to fan 2 control.

I tried moving 32 degrees up to 220 and no help. Truck is only running mid 190's .

 

Are both fans running on High or low, 1 fan or both? Also you could try logging your AC pressures to see if they are the reason the fans are activating....

 

I'll do that.. Now that you mention it this truck had a AC service not long ago. Maybe they over serviced it.

I'm using blue 42, red 33 with red 33 removed and the auto recirc turned to #2 fan control.

 

I'll do that.. Now that you mention it this truck had a AC service not long ago. Maybe they over serviced it.

I'm using blue 42, red 33 with red 33 removed and the auto recirc turned to #2 fan control.

 

That is way i have setup mine and others... So it should work..

 

I should say only fan 1 is running constantly. Fan 2 is quiet

 

Checked AC pressure. About 100psi high and low with it off. So that shouldn't be the reasonwhy its commanding on.

Also tried another computer.. same

I'm really at a loss with it. The only way I can get the fans not to come on is select "no fans" but then of course they don't run when they need to!

 

Update, Went to a 2002 OS and she works fine.. Go figure?