I loaded the XDF provided in the zip and loaded all the hex through it. everything showed up just fine for me.
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assuming you guys are cheap bastards like i am, you can make an alternative to a solid state relay using some MOSFETs.
since the PCM provides ground only when it wants something turned on, a P-channel MOSFET can probably be worked in, though i would confirm this with someone who actually messes with P-channel MOSFETs.
if i'm right about this, you can grab IRF9540 units from my favorite overseas supplier for $.61 each. each one is rated to continuously handle up to 23 amps in a TO-220 package. i'd add a heatsink to it and group a few of them together, but that's just me.
i can't figure out the pull up/pull down resistor logic though(i'm used to N-channel), so i wouldn't just jump at it instantly.
Just registered here after reading for hours.
Looks like you are the guys to come to when I have questions with my upcoming instal.
My first question goes to 93V8S10.....
Any chance you have a $OE ready version of this handy?
Thanks
Jim
Thanks, I saw that one, but it doesn't include the soft start or trans fan this one does though.
I might be able to figure out the coding to add them, since that post lists most of the locations. The way I understand it the locations are the only difference between $OD and $OE for the purposes of a fan hack....??
Still not sure I am up to the task of writing/modding my own code yet. Working on getting there, just need to get my head around this stuff a bit more before I will be very comfortable with it.
Jim
Yup that's pretty much it. $0D has some trans parameters that $0E doesn't, or at least aren't listed or commented. The Trans control scheme may be slightly different(which could encompass quite a lot of code), I haven't spent that much time comparing them.
Actually after thinking about it they would have to be somewhat different because of the Turbine Input Speed Sensor, and all the slip calculations that that the PCM makes.
OK A newbie here, i have been reading this post for a few days. I finally got around to getting some of these relays (Chrysler) mentioned above. I have wired up and programmed my PCM. It works pretty good except when the fans come on the lights inside and out flicker. I am thinking maybe it is too much amps to start the fan motor. Is there any solution to the flickering lights?
Anyone??
Got to be where the fan relay is getting power from? If it's stealing power from Accessories then yes, but if the fan relay was getting power from battery it should not happen...
Could be a bad body or chassis ground
I am going to be using this to control my fans. I really don't need the TPS setting. Since I don't, where should it be set so it doesn't trigger due to tps, or possibly interfere with the other triggers(don't know if it can interfere)? Leave at 0, or put it all the way up?
So I just installed a electric cooling fan in my cherokee today. All I gotta do is finish up some wiring. Its a single fan, single speed, and I will be using a standard relay (not pwm). However, I am nowhere near smart enough to put the code into my bin. Is there anyone here that would be willing to do it for me if I email them a copy of my bin?
It's easier than you think.
Open up the hex editor in Tuner Pro (ctrl+h IIRC), go to the addresses needed and type the HEX values into the locations indicated in the first post. Once you get through the values, click on save or commit to bin, save under a new file name, and continue as usual.
You can add the parameters to the XDF as well, so that you can make adjustments, if there isn't already a posted XDF with the fan parameters in it.