Ability to change coolant temperature AC fan-on set-point.

[modulation]

I have a ka24de, and the little AC fan is triggered by the ECU at a high coolant temp. (Not sure of exact number.) I'm sure there are plenty of other nissan ECU's/cars which do the same.

If it's not difficult to find, change, program etc. , could nistune have an option to change the coolant temperature which the ecu triggers the AC fan on at?

The reason in doing this would be to then replace the small AC fan with another high rate CFM electric fan.

Right now it's a popular mod in the U.S. to get rid of the clutch fan and have electric fan(s) put in it's place. People either ghetto-rig a switch or have to put in another coolant temp probe.

I know you are busy with knock stuff etc.. but just thought I'd throw this out there.

[Matt]

should be a matter of finding the address which triggers it. Z32 does this kind of operation also and addresses are discovered for that

I'm wondering if it is already out there in an XDF or something. If not I'll have to dig for it

Added to enhancement list

[modulation]

Matt this would be awesome.

In the U.S. Ford Taurus's and 90's Altimas are very common in junkyards these days and are a cheap source of a high flow rate CFM fans.

Getting rid of the clutch fan and replacing it with an electric fan frees up a little HP, a good amount of room in the engine bay. (Some people say they move more air then the clutch fan, but I don't think it's true.)

I.E.
http://forums.nicoclub.com/zerothread?id=219127

[modulation]

Is this of any help?

http://eccs.hybridka.com/viewtopic.php? ... 24DE#p9391

[Matt]

noticed i had this in the address file


#FAN_TEMP_1A,&H250C,2,1,1,1,Fan temp#1A
#FAN_TEMP_1B,&H2534,2,1,1,1,Fan temp#1B
#FAN_TEMP_2A,&H2514,2,1,1,1,Fan temp#2A
#FAN_TEMP_2B,&H2538,2,1,1,1,Fan temp#2B
#FAN_TEMP_3A,&H251C,2,1,1,1,Fan temp#3A
#FAN_TEMP_3B,&H253C,2,1,1,1,Fan temp#3B
#FAN_TEMP_4A,&H2524,2,1,1,1,Fan temp#4A
#FAN_TEMP_4B,&H2540,2,1,1,1,Fan temp#4B

if you uncomment it will show

[modulation]

noticed i had this in the address file


#FAN_TEMP_1A,&H250C,2,1,1,1,Fan temp#1A
#FAN_TEMP_1B,&H2534,2,1,1,1,Fan temp#1B
#FAN_TEMP_2A,&H2514,2,1,1,1,Fan temp#2A
#FAN_TEMP_2B,&H2538,2,1,1,1,Fan temp#2B
#FAN_TEMP_3A,&H251C,2,1,1,1,Fan temp#3A
#FAN_TEMP_3B,&H253C,2,1,1,1,Fan temp#3B
#FAN_TEMP_4A,&H2524,2,1,1,1,Fan temp#4A
#FAN_TEMP_4B,&H2540,2,1,1,1,Fan temp#4B

if you uncomment it will show

I uncommented them and they do show up into nistune.
Now though when I try to upload the changes I make (or any bin file) I get a "Invalid address! Check address file Address A50C cannot be accesses on NistuneBoard."

I know that A50C is hex so I guess I uncommented too many fan addresses, which ones should be left commented?

If I try to upload a bin, then after the whole bin is almost transferred over, nistune has a "communications error" and disconnects.

Thanks!

[modulation]

I took a second look at this, and I probably need to use the base stock bin and then copy the changes I've made to the maps onto it after I edited the address file.

I'll let you know how this goes tomorrow.

[Matt]

might be outside the acceptable address range for the nistune board (if it ventures into the ECU code area... since we only allow map changes within a memory boundary)

[modulation]

might be outside the acceptable address range for the nistune board (if it ventures into the ECU code area... since we only allow map changes within a memory boundary)

It won't even let me download the ECU image no matter what.
I can't even upload the base image.

I attached a log file for you to see if it would be of any help.

Would this feature require a firmware reflash then?

[Matt]

this is the valid memory range in the board...

min = 0x0000 max = 0x0FFF => translates to 0x8000 - 0x8FFF in the board

obviously those memory areas in the address file are where the ECU code is located so the access to those parts is denied (to prevent accidental ECU code corruption)

that is why you get the memory access error on the board when uncommenting those lines

I could do a special ENT opening up those areas but would need a reprogram as you suggested to use it

[Caspers_240]

I could do a special ENT opening up those areas but would need a reprogram as you suggested to use it

That would be an awesome add-on feature that would help us E fan users! maybe in the same upgrade package as the knock detect feature when its 100%

[Matt]

i did a special patch ENT with no address range checking last week so its not a major issue to do this, but best to wait for knock code before doing a board swap