Kosij Legacy Donating Member 2,045 Member For: 15y 1m 14d Gender: Male Posted 17/04/12 12:20 AM Posted 17/04/12 12:20 AM Just wondering can a switch be ran so I could switch on my thermo fans when ever I needed to?Or will doing anything like this affect the computer?
ratter Member 6,793 Member For: 20y 3m 29d Gender: Male Location: @ my laptop Posted 17/04/12 12:23 AM Posted 17/04/12 12:23 AM Why would you? the ecu controls them quite well and temperature to cut in can be adjusted in the tune.I have seen way too many cars that have their fans hard wired to a switch, only for the owner to forget about them until things start to boil, most owners are diligent about watching the temp gauge but as time goes by they forget.
Paulie2256 Legacy Donating Member 7,441 Member For: 17y 10m 3d Gender: Male Location: SE Melbourne Posted 17/04/12 12:23 AM Posted 17/04/12 12:23 AM You can run a switch but if you bypass the PCM it will probably throw codes. Your car should already know by itself when it needs cooling.
Paulie2256 Legacy Donating Member 7,441 Member For: 17y 10m 3d Gender: Male Location: SE Melbourne Posted 17/04/12 12:24 AM Posted 17/04/12 12:24 AM Lol ratter beat me by a bees dick.
darkness Member 20 Member For: 15y 11m 21d Gender: Male Location: Melbourne Posted 17/04/12 12:26 AM Posted 17/04/12 12:26 AM can you put a switch in and keep the ecu's auto sensor too?
ratter Member 6,793 Member For: 20y 3m 29d Gender: Male Location: @ my laptop Posted 17/04/12 12:29 AM Posted 17/04/12 12:29 AM Lol ratter beat me by a bees dick.you snooze, you lose
Paulie2256 Legacy Donating Member 7,441 Member For: 17y 10m 3d Gender: Male Location: SE Melbourne Posted 17/04/12 12:39 AM Posted 17/04/12 12:39 AM (edited) can you put a switch in and keep the ecu's auto sensor too?I'm not an auto elec however I have reason to believe that if you do this and have the fan switch in the on position, then the pcm decides to switch it on as well you will blow the fan fuse(s) in the car.You would need some input back into the pcm to tell it that the fan is running. Also, not sure if the pcm knows the fans RPM, if so this will further complicate things. Edited 17/04/12 12:41 AM by Paulie2256
darkness Member 20 Member For: 15y 11m 21d Gender: Male Location: Melbourne Posted 17/04/12 12:50 AM Posted 17/04/12 12:50 AM sounds like a real head ace
tab Sucker Moderating Team 32,303 Member For: 22y 5m Gender: Male Location: Brisbane Posted 17/04/12 12:51 AM Posted 17/04/12 12:51 AM I believe all the ECU does is earth the relay(s) trigger, so can't see how it could cause issues being earthed twice.Only one way to find out... 1
Kosij Legacy Donating Member 2,045 Member For: 15y 1m 14d Gender: Male Posted 17/04/12 01:11 AM Author Posted 17/04/12 01:11 AM (edited) Fark it back to the tuner I go Apparently my fans were set to come on earlier but they don't come on untill a bees dick under half! Edited 17/04/12 01:12 AM by Kosij
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