Just purchased the $EE / $EEB ECM files for use with the Tuner 2.25V program. Was able to connect to my PCM and read the Bin file with my LT-1 Edit cable.
Question is, can't seem to find the fan temperature On / Off settings in Tuner and some of the other functions I can see in Lt-1 edit.
Does the program display these differently?
I basically was interested in Tuner as it can change the display fuel use settings as I have 30# injectors. You can't edit that in LT-1 edit.
Actually, I wonder if the program values you believe are on and off temperature limits actually are that!
This is the LT-1 edit user definitions for the high/low values:
Under each stage there are two settings, the PCM uses the first setting when the car speed in MPH is below the Fan Speed threshold, the second setting is used when the car road speed is over the Fan Speed threshold.
The Hysteresis is the temperature drop required before the fans turn off. The upper Hysteresis value is used when the road speed is below threshold, and the lower value is used when the road speed is above the threshold.
The values I see when I look at the same PCM file in the two programs are the under and over speed values, not lower and upper temperature values. I think I'm going to ask the TC guy to explain these....
BTW, I think I'm correct as the fan hysteresis values are in the ECM constants listing and they match my LT-1 edit definitions.
So, the values you think are low and high fan temps are actually fan turn on temps at below and above the MPH threshold.
The hysteresis is the deg C temp drop before the fans turn off.
Also, the MPH threshold speed is in the ECM constants list just below the hysteresis values and they match my zero speed value in LT-1 edit
In earlier versions of the $EE definition file the fans on/off were in the ECM Constant tables, which was less confusing. When I recieved an update of the def file I couldn't find the fan settings, so I emailed TC and they responded with the table "Fan enable vs coolant temp vs speed" controls the fan temps on/off.
Let me know what you find out.
-Mike
__________________
2001 White/Black/Black Vert M6/Z51: LPE TT650 580rwhp/540rwtq
1994 White/Red M6 LT1 Corvette: 374rwhp/345rwtq,12.37@119: Heads/Cam/4.10's
2001 Ford Lightning: 425rwhp/503rwtq,12.85@108
2006 Cobalt LS (DD)
TC hasn't responded yet, however, I know I'm correct based on comparing the values in LT-1 edit and tunercat using my bin to lt-1 file type converter....I can open the exact same data file information in each program and compare them side by side. Then I use the Lt-1 manual which has the details of what each value is that TC doesn't explain.
Like I stated before, the LT-1 edit hysterisis values are the same as the TC constant values, etc.
I don't know who told you that those table values were the low and high temperatures, but that is unfortunately not the case. They are the fan turn on C temps above and below the vehicle set mph for fan 1 & fan 2.
I really appreciate your truly tactfull Opinion, but it's just that, an Opinion
Tuner Cat, LT-1 Edit, RT Tuner, etc. are all just ECM bin file readers/editors that permit editing the values in GM's original data tables. They cannot combine data or alter the arrangement of the data tables, nor add additional data items, as the ECM base operation system or BIOS programing would need to be altered. So, whatever LT-1 edit reads and defines, has to be the same in all the other edit programs. Your explanation of the table values unfortunatley does not agree with this logic.
We have too much invested in our vehicles to be guessing what controls what.
I'm a professional engineer, and not much of a gambler
I'd like to confirm the data fan table values definition from the author so all the Forum members can benefit.
Below is a copy of the email I just resent requesting a Yes/No response from TC on this topic:
Sorry to bother you again, but another member of the Corvette Forum is challenging me on this and we need to have a Yes or No from you on the following:
Thanks in advance......
Was discussing your fan enable temperture (C) vs speed table.
It shows 4 values.
When I lookup the same 4 values in LT-1 edit
They define them as follows:
Under each stage there are two settings, the PCM uses the first setting when the car speed in MPH is below the Fan Speed threshold, the second setting is used when the car road speed is over the Fan Speed threshold.
The Hysteresis is the temperature drop required before the fans turn off. The upper Hysteresis value is used when the road speed is below threshold, and the lower value is used when the road speed is above the threshold.
"Sorry for the confusion. The Fan on/off points were recently moved to a table called 'Fan Enable Coolant Temp Vs. Speed' located in the tables section. This was done to free up some space to add some new constants. The help file hasn't been updated yet.
Best regards,
TC"
__________________
2001 White/Black/Black Vert M6/Z51: LPE TT650 580rwhp/540rwtq
1994 White/Red M6 LT1 Corvette: 374rwhp/345rwtq,12.37@119: Heads/Cam/4.10's
2001 Ford Lightning: 425rwhp/503rwtq,12.85@108
2006 Cobalt LS (DD)
"Sorry for the confusion. The Fan on/off points were recently moved to a table called 'Fan Enable Coolant Temp Vs. Speed' located in the tables section. This was done to free up some space to add some new constants. The help file hasn't been updated yet.
Best regards,
TC"
Sorry, TC's explanation doesn't agree with with the table title....I wonder if they actually know whats in the ECM table!
Was almost ready to purchase the program as I have purchased the ECM constant file to see how it works.....
Staying with LT-1 edit...at least I know what its doing
The current response from TC as of today is in agreement with me as follows (this makes logical sense based on what is in the constant tables as I noted previously):
Hi Al,
Sorry I guess you didn't receive our last e-mail for some reason.
Yes, the temperatures in the Low column are used when the vehicle speed is less than the 'Fan High/Low Vehicle Speed Threshold' constant value. For speeds above this value the temperatures in the 'High' column are used.
Once the coolant temperature rises above these thresholds the fan will stay on until the coolant temperature drops below the threshold minus the 'Fan Temp. Hysteresis - Low Vehicle Speed' (or 'Fan Temp Hysteresis - High Vehicle Speed' depending on vehicle speed) constant value.
Wow, some people just can't admit when they are WRONG!!!
Yah, we're all waiting for you to fess up
It's just nice to know we finally know that the tables match the LT-1 definition, so Forum Members can basically reference the LT-1 Edit User Guide on the Tune It Up Website as a referenece point until TC updates the help file
Corvette Store
Former LT-1 Edit Now Trying to Use TunerCat Tuner
Wow, some people just can't admit when they are WRONG!!!
