$12p flex table for fan control

[dooda]

Hi all,
Hopefully this is the right section to post in lol

I have set up a flex table in $12p to control my thermo fans,
My question is the table seems to be limited to the temperature range (ie jumps from 79.4 to 103.3). Can i add extra rows/columns to give me more variable points in between ? or have i set the table up completely wrong ? lol

Thanks

flex a

flexa.jpg (122.26 KiB) Viewed 5460 times

[Jayme]

sorry to sound obvious but why not use the built in fan temp control? "Fan Params - High speed fan ON coolant threshold"

[dooda]

Hi mate

Nah I am only new to the tuning side of things so not the obvious at all lol
If i do that how do i wire that up to the ecu ? is there a specific pin output that the fan parameter runs on etc? and is it an earthed ouput ?

Cheers

[Holden202T]

ok firstl to answer that question of the flex table, you can use the flashtool to adjust the table, make the minimum temp 50 or 80 or something like that so then you'll have more gradual temp increases on the scale, you only really need to define above and below your range and then fill in the section you want.

as for the inbuilt fan control, use pin C1 (blue/white) to activate the relay and this grounds inside the ecm.

[dooda]

Thanks Holden 202
Greatly appreciated .
I have already wired in the flex table A so may as well continue to use that. i just refined the temp range with the flash tool and that has fixed the problem

One more final question if you all don't mind

I am running a 355 stroker in a vn commodore - does anyone know roughly what temp you would recommend the thermos to cut in ? I have been recommended about 95 degrees , does this sound right ?

Thanks all

[VL400]

It firstly depends on the thermostat, you want it higher than that to ensure the fans dont continue to run after it closes and stops the engine temp falling.

Just to add to the flex table temp range, say you want fan on at 95 deg, you can make the table range from 85 to 105 deg - whatever is in the boundry cells (85 and 105 rows/columns) the flex output will use, so as long as the 105 cells have 100% (or near enough) the fan will continue to run above 105deg.

However, I would also suggest using the dedicated fan control (will be a wiring in the loom already) as the flex tables do not provide any hysteresis ie fan on and off at 95deg, unlike the high speed fan control which would be on at say 95deg and off at 90 deg - means the fans are not constantly turning on and off for short periods.

[dooda]

Thanks Vl400
I may be better off using the fan control built into 12p then. When you say the wiring is already there on pin c1 ( i have a vn commodore 304 v8 ) where does the fan control wiring run to ? as the vn 304 runs the viscous fan standard

[VL400]

It would have, or still does, control the ac condenser fan

[dooda]

Ah now that makes sense , ill have a look tomorrow

Thanks for the excellent help mate, greatly appreciated

[hot308vb]

hey bud how did you go with setting up the fan control? if you need some pointers ill show you how i did it on my vs clubby
i wouldve posted a few months ago but ive only just come across this!
Rob