PassThru J2534 pinout for communication with DAS

[P2XA]

Hi! I found pin out of OBD-2 to Benz38pin cable:
OBD-2 ------------------------Benz 38 pins connector
4+5 ---- 1 (Signal GND)
7 ----15(K-line)
16 ----3(Power)

[P2XA]

I checked some connections and pin numbers for the cable that came bundled with Passthru j2534 25 pins to OBD and made the table of connections:
25 pins connector---------------OBD connector
1----------------------------------8
4------------------------------------
&--5
5------------------------------------
6----------------------------------6
7----------------------------------2
9----------------------------------16
10---------------------------------15
11---------------------------------14
12---------------------------------13
13---------------------------------12
14---------------------------------1
15---------------------------------10
16---------------------------------9
24---------------------------------9

[P2XA]

The fact that the pin number 7 OBD connector is not used in this cable.

[P2XA]

The problem is this: under what number in MB 38 pin connector is K-line?
As far as I know L-line in the OBD at number 15.

[P2XA]

I found Mercedes 38 pin diagnostic connector pinout this:Mercedes 38 pin diagnostic connector pinout (http://www.evoscan.com/technical-vehicle-manuals/115)

[P2XA]

But the number of K-line is not listed.

[grinovsky]

what's this car ?

[paro44]

The problem is this: under what number in MB 38 pin connector is K-line?


Mercedes use a lot of pins for k-line, it depends on the ecu you want to scan.
pin 1 --- ground
pin 3 --- +12v
pin 4,5,6...36 --- k-line for engine, abs, srs....(look at the pinout you already posted)
pin 24,25,27,29,35,37,38 are not used

so you need to switch k-line (pin7 from 16-pin obd connector) to the needed pin from 38-pin connector.
I don't know if its the same with passthru.

[P2XA]

Thanx! The car is Mercedes-Benz w202 C230 Kompressor 1998y

[P2XA]

I use Actia Passthru XS for connect to this car.

[P2XA]

Actia Passthru XS pinout this:

[paro44]

Actia Passthru XS pinout this:

From my understanding you need following wiring:
Multidiag 25-pin ---- MB 38-pin
16 or 24 ---- 3
4 or 5 or 25 ---- 1
1 ---- 4 or 5 or 6...36 (24,25,27,29,35,37,38 are not used)

If your 25pin to 16pin passthru cable is correct (i don't think so since obd pin 7 is missing, should be connected to pin 1) you can use manual multiplexer (38 pin breakout box) to manually switch pin 7 to k-line of 38pin connector)

[P2XA]

PassThru 25pin--------to---------OBD
pin 7------------------------------2

[paro44]

PassThru 25pin--------to---------OBD
pin 7------------------------------2

I think your cable should have connection:
PassThru 25pin--------to---------OBD
pin 1------------------------------7

That is the k-line on obd-connector.

[P2XA]

This is connection of 25pin toOBD cable:
25pin-------------------OBD
1-----------------------8
7-----------------------2

[paro44]

This is connection of 25pin toOBD cable:
25pin-------------------OBD
1-----------------------8
7-----------------------2

Yes, i have seen that. But how can your interface communicate with k-line which is on pin7 on obd connector? The interface pinout (post #11) shows k-line on pin 1 (db-25 on interface). With your cable it goes to pin 8 (obd) and not to pin 7.

But the most strange thing is that your cable does not have pin 7 (obd) connected?

[P2XA]

Yes it is!
My VCI is a clone.

[P2XA]

My question is: when connecting K-line (7 pin) 25db connector to pin 19 (Diagnostic module (OBD II) MB 38pin then will it be possible to do diagnostics of all units car?

[P2XA]

Yes, i have seen that. But how can your interface communicate with k-line which is on pin7 on obd connector? The interface pinout (post #11) shows k-line on pin 1 (db-25 on interface). With your cable it goes to pin 8 (obd) and not to pin 7.

But the most strange thing is that your cable does not have pin 7 (obd) connected?
K-line Passthru connected to pin 2 OBD

[grinovsky]

this is your pin out
http://i43.servimg.com/u/f43/16/03/79/30/mb_38_10.jpg

[grinovsky]

plug 38 pin out:
4-K line engine
5-K line LH-jetronic
6-K line ABS
30-K line airbag
10-Kline gearbox module
15- k line dash
20- k line gatway(BSI)
1-GND
3- +12V permanent

[paro44]

Look here for more ecus: (Adapter 38 Pin DB Mercedes OBD OBD2 II f?r Bosch KTS | eBay (http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=220616194058#ht_2697wt_695))

[dimitar22]

Can any one tell mi is it possible to use my car daq plus interface with das software in order to diagnose MB trucks?