Lexia Cable issues

[Rhothgar]

Steve, here is the wiring from the round connector all the way through to the 30 pin rectangular connector.

The pins on the round connector are actually numbered on the plug but the method of counting them is a little ambiguous so I thought it best to take a photo and show the pin numbers as I interpreted them:



Here are the pinouts referring to the above picture and the 30 pin rectangular connector on my previous post:

30 pin rectangular PSA / 30 pin round connector / Function

A1 / 5 / +12 volts
A2 / 22 / Switched (?) +12 volts
A3 / 3 and 4 / Chassis Ground
C1 / 25 / Engine ECU K-line
C2 / 12 / Engine ECU L-line (?)
D2 / 2 / GMV2 test (?)
E1 / 8 / K-line ABS
E2 / 14 / K-line Clearance adjustment (Hydractive 2 ?)
E3 / 7 / K-line Steering wheel module
F1 / 26 / K-line Heater / Aircon
F3 / 1 / K-line Air Bag
G1 / 11 / K-line Gearbox ECU
H3 / 6 / K-line Door lock
I1 / 30 / K-line Rear view mirror
I2 / 27 / K-line Anti-theft alarm
I3 / 30 / K-line Immobiliser

Hope this helps.

A few people have asked about the wiring of these cables recently, dropbox killing external links ruined my picture attachment above a few years ago so here it is again:



And here is my adaptor:

Simon, I'm gonna find you and I'm gonna kiss you!

After days of struggle I finally got it working thanks to your pinout diagrams!

The first time I saw this I didn't realise there was a page 2 on it, and it beeing from 2014 I didn't wanna write anything in here but now that you've updated it i'm gonna do it so maybe this can help somebody.

I had the 30pin to OBD 2 adapter ordered from E-bay years ago and it never worked. Looking at your schemes I realised that there were no pins where they were supposed to be for eg. A2 (ignition +12V) C1 and C2 (CAN ECU lines) were missing on the adapter. So I disassemled mine and started reassembling it back up as it should be. Finished, tested and it didn't work. Then i realised, after i saw your last post that I mirrored the OBD2 connector, actually I looked up some pinout diagrams online and thought they were meant to be for the on car side of the connector but they were not... Long story short, I didn't fry anything (luckily) and I have the adapter working now after looking at your updated pictures!

I'd love to know HOW you got into the 30 pin connector on the brown end.

I have an issue reading airbag and aircon ECU on S2 Xantia so I thought I'll check S1 1.9TD for airbags and ABS. ABS reads - Airbags do not.

I really want to get that tested because S2 could possibly be a configuration issue but I am told that if faults have lit up on the dashboard on the S2 then the airbag ECU must be communicating. I am not sure that is true because in the S1 the airbag ECU is a stand-alone system with no engine ECU to reference it. I imagine this is the same in the S2 although perhaps with some added complication.

I have all the wiring diagrams and the S2 wiring diagram doesn't show any connection back to the Engine ECU so it MUST be stand-alone too!

[JohnnyUndercover]

I'd love to know HOW you got into the 30 pin connector on the brown end.

If I remember correctly it was a game of pushing and pulling. It comes off like a cap basically. Then inside there are pieces that secure it in place (you'll know when you see it). And in order to pull out the white tabs you have to press a little lever that locks them in place. For assembly I used hot glue. The adapter still holds and works today.

Additional pictures from back then:


Hope it helps!

[Rhothgar]

Thanks for replying so promptly.

Unfortunately I did get into mine but it is substantially better built would you believe? I'll post a picture tomorrow.

Got the black cap off eventually but there is a grey underbelly to it that has no chance of coming out. I have a mate who has an old 30 pin that was probably from a genuine diag tool back in the day so I'll try and purloin that.

On positive news, I feel I am half way to a resurrected Rev B Lexia now. Just gone over all the chip legs with flux and a soldering iron and I've gone from a green LED lighting and no recognition on Windows 7 to green LED and USB Device not recognised...

Exciting times!