D9 semi-mux BSI & Dash problems

[colin406exec]

thanks for the welcome guys
its a speedo revcounter temp fuel and milage problem when i open the drivers door it wakes the bsi clocks light up stop light flashes beeps management light is on when i start the car no revcounter speed temp and fuel gauge stuck at half no stop light on tho plugged in to pp no fault codes in anything changed ecu bsi and key still the same changed clocks still the same checked wires in footwell still the same drives no probs done 400 miles today no power loss or anything and everything else works its a d9 no com2000
thanks cloin

[Doggy]

Sounds like you've eliminated most of the usual suspects......

Looks like you've changed all the electronic modules, so a wiring issue is likely. If I understand your description, more or less everything works, but have multiple display / indication problems?

I think the clocks on a pre-mux D9 are largely hard wired - have you verified the continuity of the earth connection(s) for the clocks? (You can always carefully try a supplementary earth to prove a point.

Failing that, what about the other earthing points? Double check all the multipole connectors.......

[steve_earwig]

a pre-mux D9

It's semi-mux - and so much for the subtle hints, I'll jabe to work out how to move this part to electrical

I was thinking an earth problem or a damaged cable. The door opening switch enters the BSI on cable 46 HAB, perhaps this might be a good starting point:



It was all looking a bit hopeless until I got to pin 19 (I'll list the whole lot, just in case...):
01 spare
02 625 - 62xx : door locking information
03 295 - 62xx : hazard warning switch input
04 295 - 2300 : hazard warning lights switch
05 6293 - 6202 : front left-hand door lock assembly
06 8613 - 6212 : rear left-hand door lock assembly
07 9616 - 8610 : anti-theft alarm system boot switch
08 6291 - 6207 : front right-hand door lock assembly
09 8602 - 8603 : anti-theft alarm switch
10 spare
11 8611 - 6202 : front left-hand door lock assembly
12 8614 - 6217 : rear right-hand door lock assembly
13 8612 - 6207 : front right-hand door lock assembly
14 5077 - 5001 : rain sensor
15 309 - 30xx 3045 : right-hand front door tread lamp
16 3002 - 3020 : rear courtesy lamp
17 3001 - 3010 : front courtesy lamp
18 396 - 2300 : hazard warning lights switch
19 9004B - 90xx traced to 4000 : instrument panel central electronic module on headlamp wash/wipe diagram
20 722 - 6415 : passenger mirror (electric mirror / heated mirror)
21 9005B - 90xx traced to 4000 : instrument panel central electronic module on headlamp wash/wipe diagram
22 ch04a - BH28 (+CC) - ignition switched live
23 bh09a - BH28 (+BB) - permanent live
24 721 - 6415 : passenger mirror (electric mirror / heated mirror)
25 mlbs1 - MC45 (eth) - earth point, driver's footwell
26 mlbs2 - MC45 (eth)

Here's that diagram:


Why the hell the headlamp washers would have a feed into the dash ECU is beyond me, also I have no idea what this "90--" is - is that a piston, an ecu or a float?

I'd head straight for that earth first, and check on the condition of the wires while I was at it. Of course there's always the chance it's something else earthing down through the BSI to MC45 and upsetting things that way but you've got to start somewhere.

[Doggy]

Capital stuff, wiggy!

[steve_earwig]

Cheers You've no idea what a bastid it is trying to follow wiring diagrams when you're 10 feet from the monitor and can only get a clear enough picture of a small part of the screen through the magnifier No, hold on, I can show you:
http://s222.photobucket.com/albums/dd19 ... CRNSHT.jpg
Open this until it's the full width of 1024 pixels, hold your thumb 10cm from your eye and move away until it covers the whole picture, remove your thumb and that's what I'm looking at.

Btw I found MC30 - it's at the bottom of the dash by the fuse panel. Somewhere.

[Doggy]

Oh, er, I see... or nearly, ish.

Have you shelled out for some pay-per-view ServiceBox, 'extras',then Steve?

[steve_earwig]

Eh wot wy wen ow? That be Sedre that be.

[steve_earwig]

I'm still digging

I have no idea what this "90--" is - is that a piston, an ecu or a float?

None of the above - it's a multiplex unit of some description. I just found one similar on the comfort VAN interconnect diagram. Or it might just be a sign to say "Heyre be dragones"...
9004 : Comfort Van data bus /
9005 : Comfort Van data bus B
XE01 - it's not telling

What I'm wondering now is does the BSI fire up anything on the comfort VAN when the door's opened and has something on here gone mad, creating all the issues.
Stuff on the comfort VAN:
BSI (check)
4000 : instrument panel central electronic module (check)
8220 : analogue module transponder (something to do with the immobiliser - receiver for the plip?)
8415 : compact disc player
8410 : radio
7215 : multifunction screen
8025 : air conditioning panel (if separate)

I can't see anything that would turn the BUS on when the doors are opened but....

Other than that, I've found some stuff I missed on the BSI on 46 HAB, it's all a mish mash of door locks and the alarm (again). A great deal of the stuff goes straight in and out of the BSI and on to cable 10 PR which, as I already know, goes everywhere! Even the windscreen washer pump is on it...

I think I'll leave this for now, I'd value your opinions chaps

[Doggy]

Eh wot wy wen ow? That be Sedre that be.

How does one acquire 'Sedre', prey tell?

[steve_earwig]

Well, first of all you Google to find a forum that can a) tell you where to download it from, b) provide you with a crack to stop it going out of date and c) provide you with keys. The files themselves are hosted on Rapidshare or similar sites, split into dozens of archives and, to blackmail you into coughing up for a site you'll only use once in your entire lifetime, they make you download the files painfully slowly, one at a time with a pause in between. 2 weeks later, when you have all the files and they all unzip & produce the contents of 3 DVDs on to your hard drive, you use Daemon Tools Lite to install the programs. When you get to the point you need to enter a registration code there'll be a key which you are meant to contact PSA with, but you take this key, post it on the site where you found the program and after a few days some kind soul with the right program will give you your activation code. Back to DTL, through to where it wants the code and, if you're very lucky, it'll work. If not it's find another source and it's back to 2 weeks of slow downloads again.

Btw mine say they will expire soon...

Mine came from auto-epc.net but it looks like you have to pay for membership to get to the good stuff now.

[colin406exec]

think im going to wate till the weekkend download the wiring diagram i have been thinking it looked like an earth problem just with it all out like it is doed the doted line mean its on another part of the diagram do we think the 90 is some sort of comfort van intreface then? just looking at the headlight washer part i cant remember them working tonight ill have to chack in the morning i can usualy see the spray when the lights are on. had to go out and check headlamp washers and they DONT work now

[steve_earwig]

I don't know why the wires only show up on the headlamp wash/wipe diagram, it might be relevant, it might not be and the fact your headlamp washers not working is just another symptom.

Dotted lines usually mean optional or a variation, so I'm not sure if this is something you have, something you don't have, or just a way of saying "watch out - multiplex!" Apart from a vague idea of how it works I know little about it.

Go for the earths first, work from the easy to the inexplicable. You have fire insurance, right?

[steve_earwig]

Still looking.... As far as I can make out the headlamp washers only work when the engine is running and the headlamps are on, the BSI puts an earth down to the relay to turn the headlamp washers on, then they fire with the windscreen washers. I can only think the multiplex is on the diagram because this is how the BSI knows the headlamps are on...

[colin406exec]

yes the head lamps need to be on and the engine running in order for them to work i will check the erths on the drivers side footwell tonight when i finish work you say there will be 3 or so to look for

[steve_earwig]

I've been trying to find better diagrams of the earths, MC45:


I can't find one of MC30 - the stupid thing is the semi-mux diagrams show the cable layouts with all the earths and connectors but I can't see MC30 anywhere. The full mux ones don't show the cable layouts - they only exist on individual diagrams and I can't find MC30 on any of them either. It does show all the earths though:


Btw on the first diagram EM45 & EM45D are "crimped earths" off of MC45, so if one of these is damp it'd be worth knowing about.