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E46 ABS control module harness wheel sensor pinout for the ABS/BRAKE/DSC bi trifecta

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93K views 11 replies 7 participants last post by  FinnL  
#1 · (Edited)
jrcarter_2000 said:
Is the pinout the same for the 2000 E46?
Click to expand...
Q: What is the E46 ABS control module harness wheel sensor pinout for proper diagnosis of the extremely common ABS/BRAKE/DSC bifecta and trifecta?
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REFERENCE:
- How to diagnose the BMW amber ABS BRAKE DSC/ASC trifecta or bifecta (1) & what are all known options when your ABS control module is bad (1) & Quick99Si's explanation of why the 10-minute wheel speed sensor diode-action quick test doesn't always work, especially on brand new non-OEM wheel speed sensors (1) (2) & explanations by 540iman as to why the fancy diagnostic tools very often (extremely often, like almost all the time) fail to properly diagnose the trifecta or bifecta (1) (2) (3) (4) (5) (6) & where to get the fancy schmancy diagnostic tools for free once you're aware of these limitations (1) & an ABS BRAKE DSC trifecta brake pressure sensor diagnostic DIY (1) & how to test and replace the steering angle sensor (1)
 
#2 · (Edited)
As many of you know, the diagnosis and repair of the extremely common ABS BRAKE ASC/DSC bifecta or trifecta is actually pretty simple, once you know how.

In fact, out of 250 thousand visitors to the canonical Bosch 5.7 DSC III thread, none have reported a failure to properly diagnose & repair the trifecta, generally for around $100 in total costs.
However if you go to the dealer, just the module itself is often quoted at over $1,200, so,it behooves the E46 owner to be armed with the proper information.

Unfortunately, I just found out today in this thread that the pinout for the E46 is (slightly) different:
> E46 (1999 - 2006) > BMW Diagnostic Tool for Scanning ABS, Brake, DSC Lights

richterbmw said:
I actually didn't remove the sensor until I ordered the new one. When I said the pin out wasn't correct I was talking about the harness under the hood where all of the points come together and plug into the ABS module. I tested from there when I originally diagnosed the problem using the a DMM.

Pins 30 and 31 are specified in the DIY diagnosis which weren't the correct pins for my rear right sensor. The other pins are correct. So after testing the other points and getting a reading from the DMM I assumed the right rear was the culprit because I wasn't getting a reading from it... Which wasn't the the problem.
Click to expand...
So, to rectify that, this thread is opened to obtain the pinout for the various E46 owners.
Note: The pinout for the four wheel speed sensors on the ABS control module harness is likely Bosch control module version specific as the E46 uses multiple control modules.

Here is the wheel speed sensor pinout for my Bosch 5.7 DSC III in my E39, for example:
Image


The question here, is what is the wheel speed sensor pinout for the various E46 ABS control module harness connectors?
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And, this chart (with my E39 highlighted) shows the various control modules used for the E46.
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#3 · (Edited)
For the record, the trifecta (or bifecta) is a common failure in the E46 - so it behooves us to find the pinout for the various Bosch control modules used in the E46.

In addition to the E46 wiki, I read every single E46 thread that mentioned the trifecta in the title, and NONE (unfortunately) provided the pinout. :(
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#5 ·
Let's ask the 'next' E46 owner with the ABS/BRAKE/DSC trifecta to confirm the pinout.

Here's the picture of my connector, with my pinout defined:
Image


And, here's a picture of me testing it:
Image
 
E
#8 · (Edited)
OMG, i think I've found the ABS pin-outs for the E46 (particular for the 2000 BMW 323i). See pdf from P_T and my comments/photos at "ABS Connector Pinout E46 2000 323i" thread http://www.bimmerfest.com/forums/showthread.php?p=7828469&posted=1#post7828469

If its correct for my DSCIII, Teves MK20 EI module (not Bosch) then the pin outs at the ABS module should be:

Front Left speed sensor is pins 1 & 2
Front right speed sensor is pins 19 & 20
Rear Left speed sensor is pins 5 & 6
Rear right speed sensor is pins 23 & 22

Note: The PDFs also confirms that there are 3 wires for the front sensor (confirmed on my front sensors) and only two in the rear (need to confirm on my car).

Also, see my post and photos at http://www.bimmerfest.com/forums/showthread.php?p=7828343#post7828343
Given the position of the ABS connector, it might not be easy to identify the pin numbers on the module or to gain access to it since the connector faces the firewall.
 
T
#6 ·
Bluebee I don't have much tools and not great being into doing things myself. However would like to give it a shot if you can assist me with step by step procedure to be followed to remove and check what parts, etc. I have a 02 325i and have all three lights in dash whih come up in a few mins of cranking and starting the car. Your help assistance will be muh appreciated. Thanks in advance.
 
E
#7 ·
Unfortunately and according to your table of "Overview of DSC Systems" for a 2000 E46 (323i) my ABS module is a DSC III, Teves MK20 EI from 6/99(?). My understanding is that 6/99 is the car's manufacture date. Where does one find the cars manufacture date anyways? I want to make sure its the correct ABS module. Btw, in some other post you mentioned that you have a Bentley's Repair manual. Would that have the ABS module pin out information for my car? Where did you buy your manual from? See my problem with the trifecta lights at #17 of:

http://www.bimmerfest.com/forums/showthread.php?p=7826649#post7826649

My speed sensor has 3 male pins instead of two. See my images there. So, how do i do the diode test?
 
H
#10 · (Edited)
2002 e46 325xi with bosch DSC III 5.7 module has different pinouts than the bosch DSC III 5.7 on your e39 thread bluebee, which greatly surprises me

After following your thread, presuming the bosch dsc III 5.7 had same pins no matter what, i found errors in all 4 readings.

After unplugging the sensors, noting the color wires to them(2 wires each to back) i have found:

Left rear wheel speed sensor:
Solid blue wire to pin 13
Solid brown wire to pin 29
(Same as blues guide for left rear wss, i got discontinuity at first test on 3 from guide 1 short so knew something was up, but left rear wss confirmed these pins on mine)

I confirmed all these tests by shorting the wss with 22 guage stiff wire and checking for contunuity, then removing short and checking for open(battery unplugged)

Right rear wheel speed sensor:
Yellow wire with black stripe to pin 14
Yellow wire with brown stripe to pin 31

Pin 30 as called for in blues diy is vacent on the harness if you look.

Doing fronts now and will edit.

Again i reiterate, this is a bosch dsc III 5.7 for sure, will edit pic in as well for sourcing
 
H
#11 · (Edited)
Did not let me edit on phone sorry

Pin outs for bosh dsc III 5.7 on 2002 325xi are same as blues except for right rear wheel speed sensor. I speculate this is why rrwss shows up alot in thread searches?

Left rear wss
Solid blue wire to pin 13
Solid brown wire to pin 29

Right rear wss
Yellow w. Black stripe to pin 14
Yellow w. Brown stripe to pin 31
Pin 30 as in blues guide is a vacant pin
http://imgur.com/YWukVrT
^ pic to verify yourself/source

Right front wss
Solid yellow to pin 15
Solid brown to pin 16

Left front wss
Solid brown to pin 12
Brown w. Red stripe to pin 28

Only right wheel speed sensor is different, and uses pin 14 instead of 30 in blues guide.

All wss harness's confirmed working and pins confirmed by unplugging wss, noting wire colors, finding discontunity on those color pins, shorting pins on harness with 22 gauge stiff wire, reading short(2-3ohms) and disconnecting short and reading disconinuity again for redudancy.

I ordered a inpa kit btw if you were wondering why go through all this, 9 days or so till i get it but now that its known will be easy for any1 else to pin out wss's quick.

Right front wss(15 and 16) was found to be short when plugged in(2-3ohms) and i will be replacing it.

Heres to hoping its not that and not some evil ex gf of this cars past owner swapping an abs pin ;) but i think thats unlikely compared to read of short or front right wss. Will repost here resolution.

Fwiw all other circuits read infinate on 20Mohm setting but being a 20 dollar dmm i think frwss is likely culprit.
 
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