Airbag light - Oh no here we go again

[Leo_The_Lion]

Hi guys,

Putting it mildly I'm getting a bit desperate here !

I know some of you have done rebuilds / projects using donor vehicles so I'm hoping someone has some under carpet wiring loom knowledge.

Previous turn key owner tried every trick in the book to get rid including unplugging any visual SRS plugs and wait for it... prised the airbag LED from the rear of the instrument panel !!!!!!!!!!!!!!!!!!!!!!!!!!

Can't trace a fault without a working dash light so replacement cluster sorted

I've done all the underseat fixes and Planet is showing no faults on the Comm2000.

On the airbag ECU Planet does say:

Permanent fault Right side belt module ignition open circuit

I posted a similar post on the Peugeot forums first thinking that a) they would have a very large audience and b) this sounds like it could be across a range of models ie anything with an SRS system.

Well, not one single answer !

Ok it won't let me post the link, please go to the P forums and look in the 206 section for my post under the same name as here entitled "206 Seatbelt Pre-tensioner module & harness - Common or uncommon to fail ?"

This has thrown me, module module module nope don't get it...

If you read the post you will see that after a bit of digging online I found this component (pictured below).

3 and 5 door variants available (6547VH and 6547VJ)

Not to be beaten the car is currently inside out (all seats consoles etc removed) and I'm staring at the bare floorpan (and all my tools are spread around waiting to get nicked while I'm typing this LOL).

I've traced the 2 pin orange pre-tensioner wires from the belt rolls on both sides and although I can't fully remove the carpet I can see that these 2 wires (one from the left and one from the right) both come to the main middle loom then that loom goes past the gearstick and due to the carpet I can't fully trace them but I think I've followed them straight to the under ashtray airbag ECU (into the large orange multipin).

I can't for the life of me find the above component inline so does the cc variant have this module ?

All I can see is 2 (one each side) little black "Airbag sensors" (google image 9636982680) bolted on the inside of both door sills under the carpet with brown multipin plugs but certainly no module as pictured above, I know I'm in the right area as my belts have exactly the same orange 2 pin push fit plugs (belt roll end) as pictured below but no module just straight to the ECU LOL.

If your answer is that the cc doesn't have this module that will explain why I can't locate it on servicebox LOLOLOLOL.

I'm really really sorry for the long post, if I could explain my year long MOTless nightmare in one paragraph I would !

I'm sure you can imagine how I feel with all that sun that I missed last year and now all the sun that I'm going to miss this year.

As much as I don't want to, I'm this close to going down the resistor route but still have a tiny bit of fight left in me to continue to troubleshoot and trace

So, any ideas what Planet is refering to with the "Right side belt module" as I thought I'd cracked it until I couldn't find the said component on the vehicle so I'm back to square one

Properly extinguishing that very stubborn airbag light and finally obtaining an MOT will be like winning the lottery to me

HELP !

You can wake up now I'm done typing

Thanks in advance

Oh yeah, cars in the sig and it is Muxed, Cheers

[Leo_The_Lion]

Just to add and re the airbag sensors, on one scan Planet listed a new fault refering to "satellite" something or other.

On a google image search I found the same component (ford variant) for a Focus which was refered to as a Satellite something or other.

Bamboozled on that one, cleared the fault and it's not come back, could this be "the module" ?

All I know is that something is not making contact and going by the scan code it's on the + live feed.

Due to the nature of the fault (SRS pyrotechnics) I'm not looking at testing anything just want to replace a component or harness.

I'm gonna put the car back together in a minute as I've had enough now and also need a beer or 6 !

This is the third time this week I've stripped her out and put it back, imagine how much labour that would cost LOL, I'm in the wrong game

[Capncol]

I'm not looking at testing anything just want to replace a component or harness.

So how are you going to know which "component or harness" to change without testing? Open circuit could be either.

[Leo_The_Lion]

I didn't think there were that many components on the system.

If Planet says module and the car has a module then I'd replace the module to see if it fixes it no ?

As I'm the only person on the internet thats ever seen this particular fault code it looks like I'll be going down the resistor route (if it works), thank god theres that left to try or I'd have to have it crushed and may still have to if the resistors don't work.

Thanks for your reply


PS: Would Peugeot UK be offended and defensive if I emailed their technical department to ask what that code refers to ? (I think the answer is obviously yes LOL)

[gazza82]

It's worth a try ... I went into my dealer once to ask for advice and they got an engineer out to help! (But that wasn't Peugeot!)

Wondering if someone has fitted the wrong air bag controller?


Have you tried the guys on 206info.co.uk as well ... they are more "technically" minded as they tend to be more radical with their 206s than most!!

[Leo_The_Lion]

206info is one I've not posted in yet, a few "airbag light" google searches come back to them.

Previous owner did mention "it's had some electronic box fited - cost me 400 quid".

He was keen for me to have the invoice for that work with the sale of the car (as a good selling point which is fair enough) now re-reading it...

Work carried out:
Carry out diagnostic
Carried out wiring test and replace Comm2000
Replace shunt fuse

Parts:
Control Unit - Part number 624263

Edit: That part number is the Comm 2000

Haven't looked at that invoice since purchase, just dug it out

Anyway, I've done a temporary fix for the MOT that doesn't involve resistors but does involve PP2K so those of you "in the know" will know what I've done then after test will revert back to normal so it nags me to death to fix it

I've won a battle but not the war... yet

[Capncol]

I didn't think there were that many components on the system.

If Planet says module and the car has a module then I'd replace the module to see if it fixes it no ?

No.
Think of a table lamp at home that is not lighting up, you know it's dark in your room, but not sure why so you plug in pp. pp says open circuit in table lamp, now you want to replace table lamp as that's what pp says is faulty. In reality, it could just be unplugged, bulb blown, fuse blown, fault in electric wire, fuse blown in consumer unit etc: See what I mean? It's not as simple as you make it sound, or you wouldn't have taken it apart 3 times. I also don't like mots gained by fraudant means. It's you and your passengers safety at stake here.

[jeffluent]

There seem to be posts on this all over the place.My reader gives open circuit seat belt warning light passenger side. I removed the green plug and soldered the wires together,still have problem.After much reading have come to the conclusion that it is the seat belt pretensioner circuit. The fix seems to be a 3.3ohm resistor across the circuit and while these can be bought on various sites specifically for Peugeots (this is a very common problem) I can't find fitting instructions. The green plug has 2 yellow and a yellow/green on one side and a blue,a brown ans a yellow and green on the other. I did see one picture of a resistor across the 2 yellows but no details.Anybody know the answer?Car is a 2003 2litre

[jeffluent]

Ref green connector under seats.Noticed a 206 pretensioner cable on e-bay.It has the green plug with blue,brown and green/yellow wires.So I now know the 2 yellow and the green and yellow on the other end of the plug go to the control unit. Also ascertained that there is a few volts between the yellow /green and either of the yellows but not between the 2 yellows.So little bit nearer connecting the resistor.

[Capncol]

Sorry. I don't condone what you are doing so you are on your own as far as I'm concerned.

[jeffluent]

Using a resistor does not stop the air bag working and,if you leave the third wire intact,does not stop the pretensioners working either so what's the problem?Everybody who puts bucket seats in is forced to disable the pretionsioners. Anyway,having seen the pretensioner loom on e-bay I know the plug that goes into the seatbelt reel is orange.I forced the central pillar cover above reel slightly open and I could see the orange plug.I gave it a good wiggle and the light has not come on for a couple of days.This of course could be pure coincidence.

[Capncol]

You seem certain of the results

Using a resistor does not stop the air bag working and,if you leave the third wire intact,does not stop the pretensioners working

Yet you are not certain on placement or wiring.
This is a safety item you are messing with, why do you think the SRS/ airbag warning system is part of the MOT and yet you are trying to bodge it so it doesn't display?

[jeffluent]

I need a circuit diagram but I can't find one anywhere.There is a continuity test circuit to the pretensioner which expects the resistance to be a few ohms. If it is higher,or open,the air bag warning light comes on. I assume the explosive devices on the air bag and the pretensioner are on the same circuit. The continuity test must be sensitive hence the problem with connectors which has been going on for years.
The circuit must involve a positive voltage along one wire going to the pretensioner and coming back along a second wire if there is continuity.My aim is to cut that second wire and solder a 3.3ohm resistor across this and the positive feed (which is left intact).
I need a circuit diagram to confirm my logic that this does not disable the pretensioner itself.

[Capncol]

Let me explain it like this
The Airbag ecu *tests* that components are present and working. It does this partly by measuring the resistance of a component. If it sees no resistance it assumes that component or wiring is faulty and lights up the abs / srs warning light to alert you.
What you are proposing is to fool the ecu that the component is present and working.

Yes, it is possible to do this, but what if that component is faulty, or goes faulty after your bodge?
The ecu won't realise, so wont put on the warning light.
You could be driving around with half the safety features not working without knowing it!
In my mind it is no different to clamping off a brake pipe because you have a leaky wheel cylinder!
Why not repair it properly, and if you can't, get someone else that can?

As I said before, that is an important safety system which is why it constitutes part of the MOT.

Would you disclose your bodge when you come to sell the car?

[GrandadMonkey]

There's none so deaf as those who will not hear and none so blind as those who will not see.