DWA LED Issue(Red Mirror Alarm LED)

AleksDeRussian · 03-13-2023, 07:48 PM

I retrofitted the Homelink mirror to my 2013 e92 328i. Now I have a 9CF9 “DWA LED Defective” code. It’s the little red LED in the bottom of the mirror for the alarm. Everything else on the mirror works auto dimming,compass,homelink.

Does anyone know how to test of the LED, like what pins I’d test with the multimeter? Is it possible to replace just the LED?

ptpending · 03-17-2023, 12:14 PM

i believe that wiring pinout on some connector may have changed
so i advise you to compare the wiring from car to mirror and wiring to car from mirror
and also do that with old mirror

AleksDeRussian · 03-19-2023, 01:39 AM

I got the mirror from a junkyard and went ahead and took the whole harness that connects to the FZD module in the roof so it’s probably not the pin out.

AleksDeRussian · 03-26-2023, 11:19 AM

Anyone know which pins/wires I’d test for the LED itself?

03-13-2023, 07:48 PM	#1
AleksDeRussian Private First Class 9 Rep 108 Posts Drives: Bmw M4 Join Date: Sep 2019 Location: Knoxville,TN iTrader: (0)	I retrofitted the Homelink mirror to my 2013 e92 328i. Now I have a 9CF9 “DWA LED Defective” code. It’s the little red LED in the bottom of the mirror for the alarm. Everything else on the mirror works auto dimming,compass,homelink. Does anyone know how to test of the LED, like what pins I’d test with the multimeter? Is it possible to replace just the LED?
	Appreciate 0 Tweet Quote

03-17-2023, 12:14 PM	#2
ptpending Colonel 456 Rep 2,747 Posts Drives: e91 Join Date: Dec 2013 Location: Poland iTrader: (1)	i believe that wiring pinout on some connector may have changed so i advise you to compare the wiring from car to mirror and wiring to car from mirror and also do that with old mirror __________________ E81 2007 130i 6cylinder Montego blue Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
	Appreciate 0 Quote

03-19-2023, 01:39 AM	#3
AleksDeRussian Private First Class 9 Rep 108 Posts Drives: Bmw M4 Join Date: Sep 2019 Location: Knoxville,TN iTrader: (0)	I got the mirror from a junkyard and went ahead and took the whole harness that connects to the FZD module in the roof so it’s probably not the pin out.
	Appreciate 0 Quote

03-26-2023, 11:19 AM	#4
AleksDeRussian Private First Class 9 Rep 108 Posts Drives: Bmw M4 Join Date: Sep 2019 Location: Knoxville,TN iTrader: (0)	Anyone know which pins/wires I’d test for the LED itself?
	Appreciate 0 Quote