MODE 4 Command Generator
Posted: Sat May 26, 2012 2:04 pm
Heres an excel sheet I've built to help diagnose faults.
It will generate a MODE4 DataStream for different mask ECM's/PCM's.
It will import a text file as a template and generate a bit controlled output generator.
The top bit with TunerPro is an option to allow the DataStream build with "0x".
The Instruction page has an example of what the txt file needs to look like.
I've attached the Excel sheet and a $11 txt file as this one I've tested on my daily driver.
The long term plan is some sort of TunerPro Plugin/AddOn or a Stand Alone Program.
At this stage I dont have the time (other Projects) and figured I'd post this anyway, it's time consuming and not that user friendly but it works
.
Feel free to add any thoughts/suggestions.
Bob
EDIT
To explain what MODE4 is...
Mode 4 is a way of forcing(turning on) ECU outputs, and altering(slewing) Inputs.
Use this to force an idle speed, transmission range, a/c compressor or any other output. Or Modify/slew an input.
MODE 4 is similar to the normal tunerPro datastream however instead of being a passive listen, it is an active command string.
Using MODE 4 can cause damage to components if used incorrectly - BE CAREFULL.
The way it works is figure out the function needed, then look through the BYTE - BIT locations find the BITs required and flip to RED as required.
A RED bit will force/increment the command a GREEN BIT is ignored.
Some functions have an enable BIT and a ON/OFF BIT.
Other Functions eg IDLE SPEED and TIMING ADVANCE have enable BITs and MODIFIER BITs the enable turns the function ON and the modifier is a MULTIPLY VALUE or force VALUE.. (Calculations not done yet)
It can get complicated, so for a start try forcing a simple function eg CHECK ENGINE light, COOLING FAN or INJECTOR OFF these are harmless with an obvious OUTPUT.
EDIT
OK I've added the calculations for the Slew/Modify values.
I would appreciate feedback if anyone tests, I've only tested what i can.
There is a V2 of the text file as well as it required some massaging to get the lookup working....
To make another file work correctly it will need "SLW", "ABS" and "ALL" in the "INPUT CONTROL WORD" bits.
The calculation looks for a the "SLW" or other mnemonic then copies the equation to calculate the variation.
The "INPUT CONTROL VALUE - Calculation x" title is used to calc the result in real world values.
If the BIT title of the INPUT CONTROL VALUE doesn't ="VALUE" the calculation will not function.
If there is a SLEW ABSOLUTE bit in the BIT0 location this will change the value loaded into the calculation.
If you follow the format of the $11, the excel sheet looks for the byte structure and for the calculations key phrases.
A cheat would be to use the $11 as a start and change the BIT - BYTE labels and HEADER BYTEs to suit.
The load function looks for the "END" phrase for the Decimal Calculation, if its not there it'll error. - I'll fix this soon too-Fixed
If you've got a MODE4 command stream definition PM me and I'll set it up.
The calculation looks in the descriptor - ALTPS EQU BIT4 "from here" 1 = CONTROL TPS INPUT SLW *1 ABS *0.57451 "to Here" -
for "SLW", "ABS" or an "ALL" then takes the *1, *0.57451 or whatever equation and loads that into the VALUE Title.
Then uses that to generate the value. So if the equation is wrong the value will be.......
Doesn't effect the command stream just the real world number used to set the RPM/DEGREES.
23 Nov
Added an error trap for the END of txt file.
21 Jan
Added the extra x00 bytes to the command string to allow multiple send commands to clear previous MODE 4 commands.
Here are some formated txt files to use with the Excel sheet.
It will generate a MODE4 DataStream for different mask ECM's/PCM's.
It will import a text file as a template and generate a bit controlled output generator.
The top bit with TunerPro is an option to allow the DataStream build with "0x".
The Instruction page has an example of what the txt file needs to look like.
I've attached the Excel sheet and a $11 txt file as this one I've tested on my daily driver.
The long term plan is some sort of TunerPro Plugin/AddOn or a Stand Alone Program.
At this stage I dont have the time (other Projects) and figured I'd post this anyway, it's time consuming and not that user friendly but it works
.Feel free to add any thoughts/suggestions.
Bob
EDIT
To explain what MODE4 is...
Mode 4 is a way of forcing(turning on) ECU outputs, and altering(slewing) Inputs.
Use this to force an idle speed, transmission range, a/c compressor or any other output. Or Modify/slew an input.
MODE 4 is similar to the normal tunerPro datastream however instead of being a passive listen, it is an active command string.
Using MODE 4 can cause damage to components if used incorrectly - BE CAREFULL.
The way it works is figure out the function needed, then look through the BYTE - BIT locations find the BITs required and flip to RED as required.
A RED bit will force/increment the command a GREEN BIT is ignored.
Some functions have an enable BIT and a ON/OFF BIT.
Other Functions eg IDLE SPEED and TIMING ADVANCE have enable BITs and MODIFIER BITs the enable turns the function ON and the modifier is a MULTIPLY VALUE or force VALUE.. (Calculations not done yet)
It can get complicated, so for a start try forcing a simple function eg CHECK ENGINE light, COOLING FAN or INJECTOR OFF these are harmless with an obvious OUTPUT.
EDIT
OK I've added the calculations for the Slew/Modify values.
I would appreciate feedback if anyone tests, I've only tested what i can.
There is a V2 of the text file as well as it required some massaging to get the lookup working
....To make another file work correctly it will need "SLW", "ABS" and "ALL" in the "INPUT CONTROL WORD" bits.
The calculation looks for a the "SLW" or other mnemonic then copies the equation to calculate the variation.
The "INPUT CONTROL VALUE - Calculation x" title is used to calc the result in real world values.
If the BIT title of the INPUT CONTROL VALUE doesn't ="VALUE" the calculation will not function.
If there is a SLEW ABSOLUTE bit in the BIT0 location this will change the value loaded into the calculation.
If you follow the format of the $11, the excel sheet looks for the byte structure and for the calculations key phrases.
A cheat would be to use the $11 as a start and change the BIT - BYTE labels and HEADER BYTEs to suit.
The load function looks for the "END" phrase for the Decimal Calculation, if its not there it'll error. - I'll fix this soon too-Fixed
If you've got a MODE4 command stream definition PM me and I'll set it up.
The calculation looks in the descriptor - ALTPS EQU BIT4 "from here" 1 = CONTROL TPS INPUT SLW *1 ABS *0.57451 "to Here" -
for "SLW", "ABS" or an "ALL" then takes the *1, *0.57451 or whatever equation and loads that into the VALUE Title.
Then uses that to generate the value. So if the equation is wrong the value will be.......
Doesn't effect the command stream just the real world number used to set the RPM/DEGREES.
23 Nov
Added an error trap for the END of txt file.
21 Jan
Added the extra x00 bytes to the command string to allow multiple send commands to clear previous MODE 4 commands.
Here are some formated txt files to use with the Excel sheet.
