24v harness adapters - group buy thread posted!!

[nando]

I do personally prefer a re-pinned harness, but some people want adapters and it seems like nobody is making them (or at least, not at prices that make sense). I don't want to work on old, dirty harnesses anymore so if you want a re-pinned harness, talk to dave (328ijunkie).

I could be persuaded to make a batch of adapters - something like 10 - if there's enough demand and it's kept simple.

it would be for:
Round C101 cars
OBD1 harnesses

Early cars with the connector in the glovebox and the oil level sensor wiring would be extra (more parts, more work, more R&D).

Basic adapter (just C101 to X20): $175 (shipping included)
add oil level sensor: $25
add connector in glove box for early cars: $25

Here's an example of the adapters I'd build:


All new wires, pins, connectors, & boots:


professionally crimped:


Approximately 6" long. This one I used high grade electrical tape for sealing but I'd probably use some shrink wrap instead with braided wire covers.

I could also leave a labeled pigtail for the glovebox connection/oil level sensor if you want to hook that up yourself, instead of charging extra.

Any interest?

[Nick_S]

You already know I'm interested.

[nokincy]

I would buy an OBD2 one.

[nando]

OBD2 requires a splice into X6031 if you want VSS etc (which you do).

I could provide a pigtail, but you'd have to hook that part up yourself. I could look into a plug in solution but it'd be more wires, and usually with an OBD2 harness I'd cut that connector off and re-route the signals through the harness to the C101.

[kid325e]

Would potentially be in for one of these..

[nrubenstein]

IMHO, adapters are much better than hacking up your harness. Why would you not want the standard wiring diagrams to make sense? And these are nice pieces - not making all the wires the same color is such a weird concept. :p

[nokincy]

OBD2 requires a splice into X6031 if you want VSS etc (which you do).

I could provide a pigtail, but you'd have to hook that part up yourself. I could look into a plug in solution but it'd be more wires, and usually with an OBD2 harness I'd cut that connector off and re-route the signals through the harness to the C101.

A pigtail would suffice if you decide to go this route.

[nando]

IMHO, adapters are much better than hacking up your harness. Why would you not want the standard wiring diagrams to make sense? And these are nice pieces - not making all the wires the same color is such a weird concept. :p

I actually try to make the colors match BMW wire colors within reason - but of course BMW wires are really expensive new, and I don't want to use old junk wires. It's too hard to get consistency, plus I don't always have every color/gage I need in my giant collection of old wiring harnesses.

These wires are high grade, made in Japan. Actually, I originally bought them right after the Fukushima disaster. Shipping was delayed for months because US customs had to scan them for radioactivity. Heh.

[RobertK]

Been doing a lot of reading in the ETMs.

IIRC for an OBD2 adapter you would just need to route VSS pin on the C101 to Pin 9 on the X20.

[justin_l_]

Been doing a lot of reading in the ETMs.

IIRC for an OBD2 adapter you would just need to route VSS pin on the C101 to Pin 9 on the X20.

That is the input for abs asc correct? Does the ecu control the asc?

[nando]

Been doing a lot of reading in the ETMs.

IIRC for an OBD2 adapter you would just need to route VSS pin on the C101 to Pin 9 on the X20.

yeah, I looked at my notes, it's the CEL signal that goes through the x6031.

so guys without a CEL don't need the x6031

[nando]

group buy thread posted

http://www.r3vlimited.com/board/showthread.php?p=3849735#post3849735

[RobertK]

That is the input for abs asc correct? Does the ecu control the asc?

Pin 15 on the OBD2 MS41.1 is the speed signal input (VSS) coming from ABS/ASC from the right rear wheel sensor on an E36. Which is basically the VSS input. Instead of getting vehicle speed from the cluster speedo / diff speed sensor OBD2 cars get VSS from the ABS wheel speed sensor after its passed on by the ABS/ASC module.

(Still new to sorting through these ETMs so someone please correct me if that's wrong or a bad interpretation.)

[328ijunkie]

Correct. its a little different than the obd1/e30 one.it being a 48 Tooth pulse wheel Signal vs 9.
Thus the ecu thinks you're going really slow all the time. ~1/5.33 of what you're really doing iirc

[nando]

nobody has found the K-factor in MS41.1? should be a 2 byte value, somewhere in the 20,000 range (pulses per KM).

all you have to do is change this value to pulses per KM for a 9-tooth wheel. then the VSS input from an E30 will work fine.