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DME and aux fan error
Hi everyone,
My E53 seems to be hungry for new parts again. LOL. Been having issues with the aux fan not working even after repaired. Turns out that the DME is sending "some" signal but not the right signal to activate the fan. Saw the scope and it's definitely not a square wave...so, I have a choice to make.
1. Send out the DME for a repair/rebuild...though the fan circuit is all that is out at this time
2. Indy suggested we put in an electric aux fan and a relay that will kick it on when the AC is activated.
Is there any downside to having a fan run anytime the AC is on? I'm not an AC specialist. I'm not against fixing the DME but I must admit that I find it attractive to replace the PWM fan with a simpler solution.
Pros/Cons appreciated so I can make an educated decision to stay stock or to make a change to my vehicle operation.
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2003 E53 4.6is, titanium silver, black Nappa interior
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07-15-2021, 08:09 PM
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