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Post by dh86svo on Jul 14, 2020 9:40:44 GMT -5
I am having an issue with my electric cooling fans. They work sometimes and don't work sometimes, usually when it is hot. I think maybe the fans are bad but I am terrible at anything electronic. I have a PimpX ecu and not sure if there is a way to diagnose through the ecu to figure out whether it is the fans or if it might be a relay or something? I have also thought about wiring the fans to a toggle switch inside the car but would rather keep everything the way it is. The fans/radiator shroud looks like it is one of the Stinger performance setups. Any help would be greatly appreciated as I am going to the 1320video Ice Cream Cruise the 1st of August.
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Post by Stinger on Jul 14, 2020 12:49:41 GMT -5
You can use the ECU's test mode to force the fan to come on for testing. Or you can just change the fan's trigger in TunerStudio (like change it from coolant temp to TPS and then with the key on/engine off you can press the throttle and it will enable the fan. If the fans only fail when hot then you'd obviously need to do the "test" when hot/after they fail.
We've not been selling the fans very long so I doubt they are ours.
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Post by dh86svo on Jul 14, 2020 13:03:05 GMT -5
You can use the ECU's test mode to force the fan to come on for testing. Or you can just change the fan's trigger in TunerStudio (like change it from coolant temp to TPS and then with the key on/engine off you can press the throttle and it will enable the fan. If the fans only fail when hot then you'd obviously need to do the "test" when hot/after they fail. We've not been selling the fans very long so I doubt they are ours.
I will try to use the ECU later on today after work. Like I said I am not very good at this electronic stuff at all. If the fans come on with the throttle input then it would be pretty safe to say the fans are ok? Then it would be down to a sensor or relay issue?
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Post by Stinger on Jul 14, 2020 13:07:51 GMT -5
The "test" checks the ECU's ability to control the fans so it tests the wiring and relay and fans and jumpers. So if it works then all of that is OK (at the time being, no idea if something is overheating sometimes or not).
The sensor used to tell the ECU the fan needs to run is the coolant temp sensor. You can see the coolant temp on the laptop so you should easily be able to tell if that's working correctly or not. These don't fail "sometimes" though, they either work or they don't UNLESS there is an intermittent issue with the wiring.
If the fans run all the time UNTIL the engine gets hot then that's a different problem entirely, as is fixed with a single settings change. That doesn't appear to be how you described it though.
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Post by dh86svo on Jul 14, 2020 14:31:37 GMT -5
The "test" checks the ECU's ability to control the fans so it tests the wiring and relay and fans and jumpers. So if it works then all of that is OK (at the time being, no idea if something is overheating sometimes or not). The sensor used to tell the ECU the fan needs to run is the coolant temp sensor. You can see the coolant temp on the laptop so you should easily be able to tell if that's working correctly or not. These don't fail "sometimes" though, they either work or they don't UNLESS there is an intermittent issue with the wiring. If the fans run all the time UNTIL the engine gets hot then that's a different problem entirely, as is fixed with a single settings change. That doesn't appear to be how you described it though. I will have to run some tests when I get time. Thank you for your help.
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Post by incrediblemsmiths on Jun 16, 2022 23:29:41 GMT -5
You can use the ECU's test mode to force the fan to come on for testing. Or you can just change the fan's trigger in TunerStudio (like change it from coolant temp to TPS and then with the key on/engine off you can press the throttle and it will enable the fan. If the fans only fail when hot then you'd obviously need to do the "test" when hot/after they fail. We've not been selling the fans very long so I doubt they are ours. I tired to trigger the main fan to come on at a lower temperature through the ECU ands tuner studio. It won't come on at the commanded temp but will still come on at 200 degrees. Can the PiMPx run the fan(s) or do the only engage off of the senders? As in very binary, hit 200 switch engages/ drops below 200 switch disengages?
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Post by Stinger on Jun 17, 2022 9:06:46 GMT -5
The ECU directly controls the fans when wired and configured to do so. If yours didn't change, it was likely because you were using the wrong output.
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Post by incrediblemsmiths on Jun 17, 2022 9:47:26 GMT -5
The ECU directly controls the fans when wired and configured to do so. If yours didn't change, it was likely because you were using the wrong output. I certainly didn't change the output. I just went into Basic load setting/fan control. Turned it on and adjusted the temps. I burned it and no change. Do you have pigtails for the wiring where it plugs into the fans and the high pressure A/C line the retaining clips are broken and I would like to replace them so I don't have cooling problems.
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Post by Stinger on Jun 17, 2022 11:33:35 GMT -5
Your fans are configured in the programmable outputs section as outlined in the startup guide. This is why you had to turn on fan control before doing your test (because it wasn't enabled in that location). Since it didn't throw an error saying you were using the same output in two different settings, this indicates it wasn't using the "fan" output in your test.
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Post by incrediblemsmiths on Jun 17, 2022 19:14:21 GMT -5
Ok. I followed that part of the guide and got it all fixed I believe. I live in Vegas. Is there a recommendation for settings that you could give me to maximize the fans? Especially while I am using the A/C?
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Post by Stinger on Jun 17, 2022 22:59:17 GMT -5
The settings we supply in the base tune is what we consider to be ideal for most users. You can't go much cooler because the thermostat is triggered at 190 degrees and you don't want the fan to prevent the thermostat from opening. If the fan (or dual fans) are running then there isn't anything more to do with the a/c as max fan is already achieved. If the fan isn't coming on when you turn on the a/c (but engine temp is cool enough to not trigger the fan) then you have to wire in the a/c input to the ECU so it knows when the a/c is "on" and configure it to trigger the fan. That would be covered in the PIMPx section, not this 2.3T tech section.
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Post by incrediblemsmiths on Jun 18, 2022 1:16:32 GMT -5
Great. Thank you!
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Post by incrediblemsmiths on Nov 1, 2023 11:38:40 GMT -5
I found that my fan pigtails had shorts in them and that ended up being why the fan worked intermittently. Thanks!
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