Picture of rear SLS sensor connector

[RodimusPrime]

Well I was able to replaced my rear subframe mounts in my E39 540iAT touring. Unfortunately, my subframe bolts all came loose when trying to lower the subframe. The rear SLS wire pulled out of the connector. Can someone please help with a wire diagram or picture would be nice. Thanks in advance.

[rdl]

There are 2 sensors on the touring rear suspension: B42 and B70 in WDS.

Right side B42 does SLS sensing as well as LWR headlight leveling (if fitted, for HID/Xenon headlights)
Left side B70 - SLS sensing only.
See attached images for schematics.
There isn't a dedicated schematic for B70 as there is for B42. I cropped the SLS control module schematic for those wire sizes & colours.

In case you're not familiar with German colour abbreviations:
WS - white
SW - black
GR - grey
GN - green
GE - yellow
BR - brown

[RodimusPrime]

Thanks for the quick response. I really need to put all this together. The wires that pulled out of the connector was on the right rear passenger side. Would that be considered B70 or B42? There's only 3 wires and all of them looked yellow. I also suspect that they attach to pin 1/4/5 in the connector, I think.?

[rdl]

The right rear sensor would be B42. In the B42 schematic, A53 is the LWR headlight control & A118 is the SLS module.
With only 3 wires you must not have HID/Xenon lights (that have leveling themselves.) Correct?

Presumably then the SLS system wires at B42 would be:
Grey with black stripe to pin 2
Yellow with grey stripe to pin 3
Yellow with brown stripe to pin 6

EDIT: I've just noticed that wire colours on the two schematics don't agree on the pin 2 wire. Note that the alternative colour is yellow with black stripe.

But, why do you think pins 1, 4 & 5? Are there signs that those locations were/are occupied?
WDS didn't have a schematic showing SLS only, i.e. no LWR. I wonder if absence of LWR makes for an alternate sensor & pin assignment?

[jp5Touring]

I can try to get a picture Saturday
Right side as in passenger side ? Yes ?

[RodimusPrime]

Rdl, there's definitely a yellow/grey, yellow/black, & yellow/brown. The molex connectors were still in the main connector under 1,4,&5. I'm trying to use the same molex connectors, but just solder them and put them back. I have halogen lights not the latter. I just need to figure out which one goes to the right pinouts. The 3rd screen shot you provided consist of the same yellow wires I have, but it occupies 2,3,&6. Both left & right x1451 connectors each have only 3 wires.

jp5, right rear passenger not rear driver side. Thanks that would be great.

[rdl]

The discrepancy in pin #s is a puzzle.
Any chance you're reading the connector diagram the wrong way? It shows pins as if looking into the side that goes to the sensor, not from the back, i.e. the wire side. These connectors often have numerals embossed in the molding - visible only with a jeweler's loupe or magnifying glass unless you have young, very good eyes.
Perhaps jp5Touring's picture will sort it out.

I'm not sure what you mean by "molex." And did the wires pull off the metal bushings inside the plug leaving no wire stubs with colours to match? Beware that the plugs for undercar sensors usually have tiny weatherproofing grommets inside the plug body to prevent moisture tracking down the wires and getting inside & corroding the contacts. I'd assume yours should have them too. Are they still there?

RealOEM lists a repair kit for front & rear sensor plugs. But isn't specific if for LWR, SLS or the dual sensor. Perhaps a dealer could help. For example:
www.realoem.com/bmw/enUS/showparts?id=DR63-USA-01-2000-E39-BMW-540i&diagId=61_1263 (http://www.realoem.com/bmw/enUS/showparts?id=DR63-USA-01-2000-E39-BMW-540i&diagId=61_1263)
You'd have to search with your model year etc. in case pt# changed over time.

Sorry I can't be more help. The rear sensor on my sedan is for the LWR headlight module. No SLS to add confusion.

[RodimusPrime]

564186 here you go. First time posting a pic.

- - - Updated - - -

I guess the metal connectors are called Molex Connectors. They were still in the connector under 1/4/5 with the yellow rubber bushings. No sleeves left in the connector.

[rdl]

...
I guess the metal connectors are called Molex Connectors. They were still in the connector under 1/4/5 with the yellow rubber bushings. No sleeves left in the connector.

OK now I understand the Molex reference. I'm accustomed to Molex being a particular brand of pins, bushings & sockets. Since BMW doesn't use Molex, I had suspected that there was some sort of wiring repair done with Molex connectors.

Your picture shows that what BMW terms bushings (female side electrical contact/terminal) pulled out of the plastic housing that plugs into the level sensor. And the sealing grommets are intact too. Nothing was lost.

It might be possible to bend the locking tabs (barbs) back and re-insert them into the housing ... once you work out the locations. If the bushings can't be reworked, BMW does sell the individual bits. See RealOEM electrical pages for the various styles and sizes.

[RodimusPrime]

Yeah, just waiting for anyone to confirm the designated pinout for the wires. Thanks

[jp5Touring]

No luck on a picture. I tried to get the SLS sensor apart but mine is stuck together due to Michigan winters.
I was afraid it would break if I forced it.

[RodimusPrime]

Thanks a lot for trying jp, could you somehow take a closer picture shot of the wires without disconnecting the connector. I just need to know which wire goes to which pinouts. I already know the location is 1,4, or 5.

[RodimusPrime]

Thanks for the help fam. I finally resolved my issue. I was able to access WDS BMW for the schematics. Hopefully all is well with that issue.

[rdl]

I don't know how I missed this before. Exactly the schematic you need - right sensor without LWR (headlight leveling)
Better late than never, I guess. :embarrasm

[RodimusPrime]

Thanks RDL, I was able to access that website yesterday and got the answer I was looking for.