electrical gremlins cured: load reduction relay write-up
02-14-2006, 08:58 AM
#1
electrical gremlins cured: load reduction relay write-up
the archives are pretty unclear about its position, its function and part number. this is specifically for a 2000 1.8t, your setup may be different.
symptoms of failure:
What doesnt work:
-no heat or A/C, the blower isnt working. but the console does.
-no turn signals, but parking lights work
-no fogs
-no boost gauge lighting (directly wired to 75X)
-no wipers
*edit, the only DTC vag-com reported during a full scan, was that of the climate control unit and the blower "not responding". not very helpful.
At first i thought maybe the nut came off the 75X post, no luck, i dropped the knee bolster at lunch, everything is secure. Also I checked every fuse 25Amp and greater, even the 40 and 50 under the relays. all are ok.
What works:
-heated seats
-interior lights
-stereo (audi symphony)
-hi and low beams
the load reduction relay is in position #2 under the dash, its NOT in the ecu box.
position #2 is the second relay from the left in this pic(marked "213"):
<img src="http://www.modifieda4.com/images/boostgauge-install/DSC00625.sized.jpg">
to change the relay you need to drop the driver's side knee bolster, as written up <a href="https://www.audiworld.com/tech/int10.shtml">here</a>. There are (4) 8mm hex head screws, two behind trim pieces, one behind the fuse panel, and one down low above the gas pedal.
part numbers:
<b>443 951 253J (BLACK MARKED "213")</b>, is what was shipped with the car
superceded by:
<b>8D0 951 253 (GREY MARKED "370")</b>, is the replacement part
it cost $39 from a VW dealership, its probably cheaper online.
*edit* <a href="https://forums.audiworld.com/a4/msgs/2580847.phtml">Autopsy pics</A>
symptoms of failure:
What doesnt work:
-no heat or A/C, the blower isnt working. but the console does.
-no turn signals, but parking lights work
-no fogs
-no boost gauge lighting (directly wired to 75X)
-no wipers
*edit, the only DTC vag-com reported during a full scan, was that of the climate control unit and the blower "not responding". not very helpful.
At first i thought maybe the nut came off the 75X post, no luck, i dropped the knee bolster at lunch, everything is secure. Also I checked every fuse 25Amp and greater, even the 40 and 50 under the relays. all are ok.
What works:
-heated seats
-interior lights
-stereo (audi symphony)
-hi and low beams
the load reduction relay is in position #2 under the dash, its NOT in the ecu box.
position #2 is the second relay from the left in this pic(marked "213"):
<img src="http://www.modifieda4.com/images/boostgauge-install/DSC00625.sized.jpg">
to change the relay you need to drop the driver's side knee bolster, as written up <a href="https://www.audiworld.com/tech/int10.shtml">here</a>. There are (4) 8mm hex head screws, two behind trim pieces, one behind the fuse panel, and one down low above the gas pedal.
part numbers:
<b>443 951 253J (BLACK MARKED "213")</b>, is what was shipped with the car
superceded by:
<b>8D0 951 253 (GREY MARKED "370")</b>, is the replacement part
it cost $39 from a VW dealership, its probably cheaper online.
*edit* <a href="https://forums.audiworld.com/a4/msgs/2580847.phtml">Autopsy pics</A>
02-14-2006, 09:11 AM
#6
in the diagram, next to the relay is a black box with "2" in it...thats the relay position.
early in the diagram section is a schematic of where "2" is...also you can barely make out a "3" in the picture above where the empty relay socket is...i didnt check, but i bet there is a "2" behind the relay.
i agree, the bentley wiring diagram section sucks, you never know if the information is accurate...i only knew to look for a "2" based on some of the information in the archives.
i agree, the bentley wiring diagram section sucks, you never know if the information is accurate...i only knew to look for a "2" based on some of the information in the archives.
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02-14-2006, 09:33 AM
#9
Nice write-up.....
Hope someone logs your post into the FAQ or tech section. I'm sure there are going to be a few people who'll need it in the future. Quality posts like that are what make AW one of the better forums out there, especially the B5 A4 Board.