Gold Sinker Mk1

[aerodynamica]

Thanks chris, will do - I have now got custody of a Lexia 3 and adapters from fellow member KennyW, was great to chat yesterday and nice to see your C5 Exclusive

So I couldn't wait to play with the lexia and with everything set up and functional I find I have the same problem as everyone else with the 30 pin adapter mentioned in the above link from Simon.

Hi Steve,

I've traced the OBD-II 16 in to 30 pin PSA rectangular connector for you. The orientation of the 30 pin connector on the pinoutsguide link you posted is a bit misleading - not only are 1 and 3 reversed when looking at the plug (since their picture is the socket in the car, not the plug) you also have to reverse A and J... which gets confusing. (I confirmed the orientation below is correct by checking for consistency of the +12v and ground wires between the two plugs, since we know those for sure on both plugs) See the photo below for the correct pin numbering and orientation:



Referring to the above pinouts, here are the connections, as well as my best guess at the function of each one, based on the pinouts on the pinoutsguide page. (There is some ambiguity on a couple of them...)

30 pin PSA / 16 pin OBD-II / Function

A1 / 16 / +12 volts
A2 / 1 / Switched (?) +12 volts
A3 / 4 / Chassis Ground
C1 / 7 / Engine ECU K-line
C2 / 15 / Engine ECU L-line (?)
D2 / 13 / GMV2 test (?)
E1 / 6 / K-line ABS
E2 / 11 / K-line Clearance adjustment (Hydractive 2 ?)
E3 / 12 / K-line Steering wheel module
F1 / 14 / K-line Heater / Aircon
F3 / 8 / K-line Air Bag
G1 / 2 / K-line Gearbox ECU
H3 / 9 / K-line Door lock
I1 / 10 / K-line Rear view mirror
I2 / 3 / K-line Anti-theft alarm
I3 / 10 / K-line Immobiliser

Note: I1 and I3 both being connected to pin 10 on the OBD-II connector is not a typo.

Hope that helps Steve

I'll see if I get a chance to trace from the round connector right through to the 30 pin rectangular one tomorrow, but the above should give you something to work with...

I just checked the pin outs on my identical looking 30 pin to 16 adapter and the pins are totally different to those in your helpful diagram Simon!

I have no pin at D1, or I2, I1.

Pin E3 connects to 3,4 and 8 of the 16 pin plug.

I have: (differences to yours are marked *)
A1 - 16
A3 - 5 *
C1 - 7
C2 - 15
C3*- 1 *
E1 - 2 *
E2 - 6 *
E3 - 3,4,8 *
F1 - 9 *
F3 - 10 *
G1 - 11 *
H1* - 12
H3 - 13 *
I3 - 14 *

So it's totally different. I checked the pins on the car itself quickly and the first thing I noticed was the pin that would be A 2 on the plug is present in the car and is indeed a switched 12v. The A1 is I think the eath to chassis.

So it's not looking too good so far. Lexia softwars says "cannot communicate" but it accepts VIN number etc.

[aerodynamica]

Further inspection: Compared to the diag socket on the car there are 7 pins that don't connect to anything: A2*, B1,2,3, D1, I1*, I2*. the three with * are those that you found on your connector.

The MOC53 plug has the following pins that don't connect to anything:
F1*, F2, G1*, H1

But I'm thinking that even if I was going to splice one or two to correct it, there still would be no pin at the plug at A2 that seems to be the 12 switched pin on the car diag socket, I can't add a pin to the plug so it might never work.

Does this mean the adapter can't work with Lexia 3 module? I wonder if I can use the LED blinker I made up for the XM series1 to connect to the single pin out from the hydractive and get flashing codes from it?
Or is thgere another version of the MOC53 plug that will work with this?

[KennyW]

Graeme,

It was nice to see you yesterday but its disappointing the connector was almost useless on your mk1.

Do you and the other guys on the forum think a new loom could be made for the early mk 1's.

Kenny

[chinkostu]

If you can get hold of a suitable plug to fit the lexia (round 30 pin isnt it?) then splicing a new one should be easy. Given the age of the cars they don't seem to share pins so 16 to 30 will never work

[aerodynamica]

Graeme,

It was nice to see you yesterday but its disappointing the connector was almost useless on your mk1.

Do you and the other guys on the forum think a new loom could be made for the early mk 1's.

Kenny

Hi Kenny, it's fine it was exactly the same story over at Richard's it's just a problem to work around somehow thanks very much though

I guess a new loom could be made for early Mk1s if we knew what was needed. But I keep thinking there might be a 'mk1 edition' for the 30 pin plug because of the substantial difference in the pin outs between the plug adapter I have and the one Simon illustrates above. I mean the 30 pin plug is identical as is the 16 pin plug at the other end but they have so many different pin locations. I wonder actually if Simon's one is actually the correct one for Mk1

Hi Chinkostu, I see what you mean but the round connector has got an adapter that leads to the 16 pin adapter for the 30 pin one. It's as though the round adapter is the one to be used in any event and what goes on the end of that is the question (tho I might be wrong there - I have no other thing to connect to the round plug anyway..)

Anyway, Hydractive still not working with the pedal sensor (except for the occasional spell where it does) but today's Xantia fixin' wasn't a waste because i removed, inspected and 'serviced' the hydraulic system Flow Divider Valve (FDV) the notorious source of so many power steering and hydraulic pressure problems on BXs, Early XMs and sinker Xantias..

The FDV was not giving any real problems in that the pressure regulator was reaching cut out and the PAS was smooth and well - assisted. I was getting the old problem of the long duration of loud hissing sound that seemed to delay the pressure regulator cutting out, first thing to check was the tightness of the HP pump belt so a few weeks ago it as tightened but the problem persisted though mostly from cold starts as it tended to behave once it was heated up and had a mile or so under its belt.
Anyway, the FDV looked dirty so I wanted to remove, clean it up and check the nylon filter that usually disintegrates and leaves fragments in the FDV upper (main) slide valve. To my surprise it was in perfect condition so that was a good sign. The end caps removed, main slide valve slid out for checks - looked pristine, blow out with compressed air and a measure of the main valve spring - 32.6mm long. This seemed to be the same length that I measured a few years ago on the blue XM SD and so was probably in spec but the FDV valve springs can suffer the same problem as the springs of the pressure regulator in that they get a bit age - weakened so I added a 1.4mm shim to the seat of it (from a spacer used inside the pre 90s height corrector dashpot so it's seen LHM action before ) and reassembled and refitted.

Running the engine and once the system pressurised (after an extended bleeding process due to mystery bubbles in LHM return to tank) the long hissing had reduced and the suspension raised up much more briskly with th PAS seemingly unchanged. 20 mile jaunt home and it a seems fine (aprt from the ridiculous suspension rear end squat and kick-up due to the pedal sensor problem..) so the hydraulics are in fine fettle. I also re-bled the rear brakes once more just to be sure as I thought there was air somehow hetting in (I suspected air getting pumped in by the HP pump ) but there was not a hint of air in the back brakes and I bled them for the first time ever, through the spokes of the Peugeot Nimrod wheels! This pleased me greatly so it took like 1/4 the time as usual with taking the back wheels off, axle stands, trying to get the back suspension to go to maximum height with the wheels off and it on axle stands. I didn't have to manually 'help' the height corrector this time.... Anyway still hoping to return to this hydractive mystery

Thanks for the help so far!

[CitroJim]

I used to have a 16 pin to 30 pin adaptor that worked perfectly on S1 Xantias with my old Lexia 2... Might still have it...

If I have then you could have it if it might be useful to you

There is a direct mapping between the ECU diagnostic lines in the 30 pin socket and the 16 pin socket so if you know your 16 pin cable works satisfactorily on an S2 Xantia then it should be easy enough to make up a working adaptor...

I'll try to dig out the pin-outs for each connector if you'd like them and then you'll be able to work out the necessary mapping...

You have checked the power supply is present at the 30 pin socket Graeme? There must be ground, unswitched +12v and ignition-switched +12v. These lines are fused and it's always worth checking the fuses...

Let me know if you need the pin-outs and I'll get hold of them later today for you...

[Mandrake]

If you can get hold of a suitable plug to fit the lexia (round 30 pin isnt it?) then splicing a new one should be easy. Given the age of the cars they don't seem to share pins so 16 to 30 will never work

A properly wired 16 to 30 pin adaptor does work but might not be able to read all ECU's - as I've mentioned mine does read most ECU's but there are three ECU's it can't read and I'm not sure if that's a limitation of the 16-30 pin adaptor or a problem on my car, as I've never tried my adaptor cable on another S1 Xantia.

A cable that goes directly from the round 30 pin connector to the rectangular 30 pin connector without first going via an OBD-II socket would be preferable, but I'm not sure if anyone has a fully working version of this type of cable to use as a pinout reference.

[CitroJim]

A properly wired 16 to 30 pin adaptor does work but might not be able to read all ECU's

I think it'll read the important ones Simon. Engine ECU (if fitted! - not applicable to early XUDs), Suspension and ABS are the most important ones...

I know what you mean about not reading all but usually they're the esoteric ones and not critical... I've never yet seen a Lexia that'll read 'em all on all cars but generally speaking my ELIT will...

I'd recommend anyone with a Xantia to look out for a good ELIT.. They won't program S2 keys and plips or reinitialise a 4HP20 but for everything else they're a dream and no laptop to faff about with either

Sadly, good ELITs with the piggy-back adaptor needed to do 30 pin and 16 pin diagnostic sockets are as rare as rocking horse manure

Duff ones are normally amenable to repair though... They're built like tanks...

[Mandrake]

A properly wired 16 to 30 pin adaptor does work but might not be able to read all ECU's

I think it'll read the important ones Simon. Engine ECU (if fitted! - not applicable to early XUDs), Suspension and ABS are the most important ones...

As I mentioned in the linked thread, these are the ECU's that my 16 to 30 pin adaptor can read on the S1 V6:

Anti-theft
Injection
Air con
ABS
Suspension
Gearbox

The ones I can't connect to:

Airbag
Rear view mirror
Deadlocks

So the important ones are covered. I would love to know if the remaining three could be read by a better cable that doesn't use a 16 to 30 pin adaptor though...

It baffles me how so many Lexia kits are sold with a 16 to 30 pin adaptor that is wired totally and utterly wrong and will not work at all... my Easy Diagostics kit seems to be one of the few where this adaptor does (mostly) work!

[CitroJim]

I think it's just how cheap Lexia rip-offs are Simon...

[KennyW]

Simon,

My adaptor was part of the easy diagnostic set and worked on my Xantia mk 2. I am wondering if there was a change in the wiring btn early mk1's and mk2's which affects the diagnostic plug at the fuse box.

I will have a look at the wiring diagrams.

Kenny

[aerodynamica]

I'll try to dig out the pin-outs for each connector if you'd like them and then you'll be able to work out the necessary mapping...

You have checked the power supply is present at the 30 pin socket Graeme? There must be ground, unswitched +12v and ignition-switched +12v. These lines are fused and it's always worth checking the fuses...

Let me know if you need the pin-outs and I'll get hold of them later today for you...

Hi Jim I've not checked the supplies and earth at the 16 pin end so that would be useful to check. There is 12v at one of the pins in row A but no corresponding pin in the 30 pin plug.

Jim that would be great to have the diagrams thanks - it might shed some light as to what the connector is supposed to have

[CitroJim]

Graeme, I shall go and hunt down the necessary, I may be a while...

[CitroJim]

Graeme, and Simon, as I'm sure you'll be keen to see this too..

Here are the pinouts of the two diagnostic sockets and their functions:

S1 30 Pin Socket

S2 16 Pin Socket

Both taken from the usual source

Hope these help and assist...

[KennyW]

Jim,

As a completely off subject, I've just realised you have the same make and model of bike I have.
Giant defy darkish blue '15

Kenny