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Old 11-26-2008, 05:26 PM   #1
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Default help with mspnp9093 fan control

I have a fan control problem.

I am not running the front clt sensor becuase it supposedly is not used by the mspnp. I have not touched any other settings because they all look right. The output #2 menu has the trigger temp set at 215, when I lower it to something colder than ambient it does not turn on. Any thoughts?
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Old 11-27-2008, 05:49 AM   #2
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Isnt the front temp sensor is what turns the fans on and off? While the rear is what you see on your dash? You could either wire it to a switch and manually turn it on and off, or do as i did, and just ground it and whenever the key is on the fans are on.
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Old 11-27-2008, 09:07 AM   #3
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Use a DMM or testlight to see if the fan is getting power, then start tracing back. There's a relay in the underhood fuse area, probably a fuse in there too. If you've done any 'experimenting' with a dual fan set up and a/c, it's likely you've blown the relay.

I hijacked the fan switch and re-wired it to the a/c fan through a DPST relay. So the main fan comes on at the temp set by MS and the secondary fan comes on with a/c or at where the fan switch is set-207 I think.
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Old 11-27-2008, 11:34 AM   #4
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I can take the switch to gnd and the fans come on. No fuses are blown. What's "dpst?"
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Old 11-27-2008, 11:46 AM   #5
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so it sounds like you did some 'experimenting' with a dual fan setup. return wiring to stock.
it's a spdt relay, not dpst. google bitch.
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Old 11-27-2008, 12:41 PM   #6
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Post screen shot of your settings. They're probably wrong.
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Old 11-27-2008, 01:05 PM   #7
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Yea, what they said. LOL............

Your almost done. Doesn't it feel good?

When you have it grounded with the key off, does the fans still run?

If not and all else fails, just hook the ground up, and install a fuse on the power end. Fans run when the car is on. And if it draws too much power it will blow the fuse.

Atleast your car is always cool.
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Old 11-27-2008, 01:19 PM   #8
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I've adjusted nothing.
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Old 11-27-2008, 01:22 PM   #9
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yeah you have. it's set to turn the fan on at 255F.
try backing it down to something more reasonable.
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Old 11-27-2008, 01:27 PM   #10
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For some BS reason you have to put that number 40*F colder than what you actually want. I think. That's why it read 215*F and been says "it's set to turn the fan on at 255F". So if it's 70*F outside put it to 0*F and see if the fans power on.
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Old 11-27-2008, 01:37 PM   #11
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at "0" I have no fans.
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Old 11-27-2008, 03:57 PM   #12
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Who knows with your frakenstein ****. Put a voltage meter on the output coming from MS and verify if it's sending out a GROUND when it turns the fans on. That will isolate the problem to either the MS or the cars wiring. Just put the meter for a continuity test. One side to ground, one to MS fan output and see if you get continuity when you tell MS to turn the fans on. Troubleshoot your ****.
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Old 11-27-2008, 06:53 PM   #13
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This **** is ghey as ****.
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Old 11-27-2008, 07:10 PM   #14
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Off topic but where is that Kpa = Psi chart you had?
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Old 11-27-2008, 08:41 PM   #15
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Kpa - 100 / 7 = psi
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Old 11-28-2008, 11:59 AM   #16
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An on-off limit of 215 equates to 175F. That is indeed the MSPNP default. Ben, you went the wrong way.
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Old 11-28-2008, 02:27 PM   #17
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paging diyautotune.
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Old 12-04-2008, 07:21 PM   #18
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any chance that this is something simple like a need to plug the sensor in, although its not in the motor?

Can someone with a 9093 unplug their front fan switch sensor and see if the fans still work? I know DIY says this works, but it would be nice to know if anyone else has successfully done this. I've bitten off more than I can chew and now I have a car I can't drive. This was my #1 concern with this car.
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Old 12-04-2008, 07:43 PM   #19
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My fan works without the thermoswitch on the thermostat cover connected. Verified many times.
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Old 12-04-2008, 07:55 PM   #20
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any idea on which pin to check coming from the computer? I'd really like to get the car working so I could drive it on a 300 mile trip.
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