Fan issues
09-19-2010, 03:33 PM
#1
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
Fan issues
I just went from parallel to standalone on my MS1 running Hi-res 10 code.
My tacho mod and idle mods work great, but my fan mod is not functioning.
I used this circuit:
I am using JS2 (output 1) going to IAC1B pin 27 and connected to the correct pin in the Miata harness. Megatune shows the Output switching on and off at the correct temps both in the car and on the SIM. The pin shows no voltage on the SIM when the output is activated.
Any ideas?
My tacho mod and idle mods work great, but my fan mod is not functioning.
I used this circuit:
I am using JS2 (output 1) going to IAC1B pin 27 and connected to the correct pin in the Miata harness. Megatune shows the Output switching on and off at the correct temps both in the car and on the SIM. The pin shows no voltage on the SIM when the output is activated.
Any ideas?
Reply
0
0
09-20-2010, 08:55 AM
#3
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,488
Total Cats: 4,077
why not put it on JS0, that's the spot used solely for fan control. then all you gotta do is set your on and off temps.
right now, make sure js2 is set for output1. then in output 1, make sure CLT is selected for the source. Then for temperatures you enter the degrees F +40, so in the if you enter 240 the fans should trigger when the coolant temp is above 200 F. For hystersis, use 10, so the fans turn off when the temps go below 190 F.
right now, make sure js2 is set for output1. then in output 1, make sure CLT is selected for the source. Then for temperatures you enter the degrees F +40, so in the if you enter 240 the fans should trigger when the coolant temp is above 200 F. For hystersis, use 10, so the fans turn off when the temps go below 190 F.
Reply
0
0
09-20-2010, 09:02 AM
#5
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,488
Total Cats: 4,077
dunno, it should just trigger a ground. use a multimeter, test for continuity between the output to the harness and ground when it switches, if it goes to ground it's working correctly, then you know it's a probably in the wiring outside the MS.
Reply
0
0
09-20-2010, 09:04 AM
#6
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
Ah when I tested it yesterday I was looking for voltage. My dumbass didn't think to check to see if it is triggering to ground. I'll check that today after work
Reply
0
0
09-20-2010, 05:05 PM
#7
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
Confirmed. . . It does in fact properly switch to ground when activated
MS to OEM adapter harness is also good.
I am connected to pin 1B as shown in this diagram:
MS to OEM adapter harness is also good.
I am connected to pin 1B as shown in this diagram:
Reply
0
0
09-20-2010, 06:10 PM
#8
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
Even if I manually ground pin 1B on the ECU harness the fan relay does not kick on. Fuse is good. IDK whats up, my fans always worked before. Are we positive this is the pin?
Reply
0
0
09-21-2010, 04:04 AM
#9
I don't have the diagrams I used to wire up my DIYPNP, but as (bad) luck has it, my MS is open in front of me since I switched programmable outputs and my fan doesn't work. (It did just fine before this)
I'm pretty sure you've got the wrong pin. Looking at my MS, I've got it wired to pin 1U on your posted connector diagram. It would be the upper, left most pin when looking into the stock harness 11x2 connector. I've got a '97 so yours should be the same.
I'm pretty sure you've got the wrong pin. Looking at my MS, I've got it wired to pin 1U on your posted connector diagram. It would be the upper, left most pin when looking into the stock harness 11x2 connector. I've got a '97 so yours should be the same.
Reply
0
0
09-21-2010, 06:25 AM
#11
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
HAHA yeah that wont work.
I do have the wrong pin it seams. the Diagram on the How-To page does not match that in the Haynes manual. It seems that they have the AC and MAIN fans backwords...and seeing as how both of my fans are parallel on the MAIN it makes sense that none are tripping. I will move the pin and confirm after work today.
I do have the wrong pin it seams. the Diagram on the How-To page does not match that in the Haynes manual. It seems that they have the AC and MAIN fans backwords...and seeing as how both of my fans are parallel on the MAIN it makes sense that none are tripping. I will move the pin and confirm after work today.
Reply
0
0
09-21-2010, 09:31 AM
#13
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,604
Total Cats: 16
The colors called out in the Haynes show the opposite wiring for the fans... Ac fan is main and main is Ac . Both 96-97 diagrams. I can scan it tonight if u would like. I'll try moving the wire to that pin and see if it works.
How did I ever daily drive this car???
How did I ever daily drive this car???
Reply
0
0
09-21-2010, 09:55 AM
#14
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,488
Total Cats: 4,077
colors should be correct, i just have them labeled wrong:
http://y8spec.com/wiring/images/wiring/96sys.pdf
page 8. 1A goes to cooling fan, 1B goes to a/c fan.
http://y8spec.com/wiring/images/wiring/96sys.pdf
page 8. 1A goes to cooling fan, 1B goes to a/c fan.
Reply
0
0
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
19
01-08-2021 11:24 AM
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
