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#1
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E53,How to read an Electrical diagram
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#2
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https://www.yumpu.com/en/document/re...ley-publishers
I'm not an expert on reading wiring diagrams, but here is some info to get you started you can check out until someone with more experience can help. Sent from my LM-Q710(FGN) using Tapatalk
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2001 BMW X5 4.4i Topaz Blue |
#3
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It would be easier to explain them on original BMW WDS (or NewTIS) diagrams. So what you actually need to know?
https://www.newtis.info/tisv2/a/en/e...ontrol/asmdexc
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E39 530dA -02 M-Sport Messing metallic E53 X5 3.0dA -06 Sport Stratus grey |
#4
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The link I sent is the company who makes bmw manuals but yeah go for it and ask a million questions
Sent from my LM-Q710(FGN) using Tapatalk
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2001 BMW X5 4.4i Topaz Blue |
#5
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the OP did ask for basic education, the link from @Boston01X5 looks like a perfect start point. It will be much easier for OP to ask an informed question when they learn a bit how to read the diagrams.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#6
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The labels starting with an X are connectors or junctions.
The labels starting with G are end devices (in the case of the diagram above). Other devices have other letters, e.g. the radio module is N9, the transmission module is A6000 etc. The labels like "0.75" and "GN/WS" are the wire size and colour - 0.75mm, green/white in this example. Colours are in German, e.g. Grün = Green, Weiß (Weiss) = White etc. I think the numbers like 15 and 30 refer to what ignition switch position (KL) the B+ voltage will appear on the labelled terminal, basically different voltage buses. There seems to be some variation to this though, as clearly the battery positive, label as 30 on the generator above, is present at all times! There are also similar numbers for earth buses etc. *edit* just been reading that these voltage bus numbers are defined in a DIN standard... 30 is a direct battery connection, 31 is a direct ground, 50 is a B+ when the ignition is in the run or start position etc.... That's a very basic starter....
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) Last edited by wpoll; 05-08-2020 at 03:55 PM. |
#7
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On the wires: signal/voltage type, wire thickness (mm2) and wire colour like said in German.
On top of the supply or at the bottom: Terminal 30: continuous battery voltage Terminal R: switched voltage ignition pos. R Terminal 15: switched voltage ignition pos. 2 Terminal 50: switched voltage ignition pos. starting Terminal 31: direct ground
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E39 530dA -02 M-Sport Messing metallic E53 X5 3.0dA -06 Sport Stratus grey |
#8
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Thank you all for your help.
After 3 MAF replacements (1 New ) I keep getting a bad MAF which is why the electrical diagram as I suspect some wiring issue. As anyone knows there are at least 3 projects going on with these cars at any one time. I attached a copy of the MAF diagram and am trying to muddle through it. |
#9
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It's way more likely you have a bad MAF than a wiring issue.
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1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#10
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It would be my 4th one if I buy.. within 4 months. One was OEM Bosch.
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