parallel megasquirt install fans don't work
#1
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All,
With all your help I've got my 97 miata running fantasticly.. except for one small detail. Apparently the fans don't come on. I expected the stock ECU to kick them on, but it's not happening.
I am going to go to a standalone configuration to simplify the situation.
From the wiki I see the easiest way to control fan is D15.
From the photo here.
![](https://lh4.ggpht.com/_uktR45iHc4Q/S_1yAToFNtI/AAAAAAAAAak/dfgQTXQFJw4/mainboard_assembly_standalone.jpg)
Do you remove D15? I assume that you no longer need JS0 connection or the Diode.
I do however need to put the diode on the harness between the AC fan and the standard fan..
If I want to test the fans without a computer plugged in, do I just give 12V to 1A and 1B?
![](http://www.boostedmiata.com/gallery2/d/5995-4/9697_standalone_harness.jpg)
Thanks again!
With all your help I've got my 97 miata running fantasticly.. except for one small detail. Apparently the fans don't come on. I expected the stock ECU to kick them on, but it's not happening.
I am going to go to a standalone configuration to simplify the situation.
From the wiki I see the easiest way to control fan is D15.
From the photo here.
![](https://lh4.ggpht.com/_uktR45iHc4Q/S_1yAToFNtI/AAAAAAAAAak/dfgQTXQFJw4/mainboard_assembly_standalone.jpg)
Do you remove D15? I assume that you no longer need JS0 connection or the Diode.
I do however need to put the diode on the harness between the AC fan and the standard fan..
If I want to test the fans without a computer plugged in, do I just give 12V to 1A and 1B?
![](http://www.boostedmiata.com/gallery2/d/5995-4/9697_standalone_harness.jpg)
Thanks again!
#2
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If you want to test the fans operation, open your diagnostics connector and jump TFA and GND.
the ECU controls the fans, so if you have a MS running the show, it needs to be modded to run fan control...you should only use the D15 circuit for fan control if you've replaced the 3904 transistor with a 2PN2222
the ECU controls the fans, so if you have a MS running the show, it needs to be modded to run fan control...you should only use the D15 circuit for fan control if you've replaced the 3904 transistor with a 2PN2222
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11-03-2015 01:51 PM