Another e85 roof issue 😵‍💫

enuff_zed said:
Morning.
My theory is based on you saying there is no airbag light on initially switching the ignition on. It should do a self test for a few seconds. This suggests to me it has been blanked off. If so, and no codes showing, it implies that no signal is coming from the SIM85 through the K-Bus, pointing to a failure within that module. As I said, the satellite modules report back through the SIM85, they are not connected to the K-Bus themselves. Therefore, a failure in the SIM85 K-Bus output will prevent any communication from the satellite modules too. You have already determined that the errant 10v is produced from the SIM85.

The lack of advisories could simply be an MOT Inspector not checking that out. I've seen that several times when i've found the light taped over.

As I said before, a problem in one part of the K-Bus can cause other things to fail.
As an example, I found an airbag light taped over. On investigation I found the K-Bus to the SIM85 was cut and taped up. When I reconnected it, the wipers, radio and roof stopped working. Fitted a new SIM85 and coded it in: everything back to normal.

Hence my suggestion that you unplug the SIM85 and see if other stuff starts working again.
Click to expand...
This car has got my head spinning. Yesterday removing the console airbag module made voltage go up from 10v to 12v on the k bus comb.

Today I thought I'd reconnect it to measure any changes. Reconnected and k bus module sitting at 12v. Have reconnected nearside satellite module and k bus comb still sitting at 12v.

Offside satellite module has 2 wires hanging out of the connector. Brown one and a brown/red. Don't suppose you know which pin they go to please.

At the moment having the centre air bag module connected or disconnected makes no difference to the reading on the k bus comb. 12v

Not siree if it just needed more time to dry out after cleaning.

Attached are the lights that come on when ignition is on (left) and also with ignition running (right). Bottom left is a bulb that just flagged up.

That sledge hammer is looking really tempting right now 😕
 

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I'll find a plug and send you a photo.
In the meantime, your airbag light is definitely blanked.
Should be in that gap to the left of the seatbelt one.
 
The plug pins are numbered left to right, 1 to 9 top row, 10 to 18 bottom row.

The brown with red stripe is in pin 10.
The brown is in pin 11.

Apologies, not the best photos.

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Dont
enuff_zed said:
Morning.
My theory is based on you saying there is no airbag light on initially switching the ignition on. It should do a self test for a few seconds. This suggests to me it has been blanked off. If so, and no codes showing, it implies that no signal is coming from the SIM85 through the K-Bus, pointing to a failure within that module. As I said, the satellite modules report back through the SIM85, they are not connected to the K-Bus themselves. Therefore, a failure in the SIM85 K-Bus output will prevent any communication from the satellite modules too. You have already determined that the errant 10v is produced from the SIM85.

The lack of advisories could simply be an MOT Inspector not checking that out. I've seen that several times when i've found the light taped over.

As I said before, a problem in one part of the K-Bus can cause other things to fail.
As an example, I found an airbag light taped over. On investigation I found the K-Bus to the SIM85 was cut and taped up. When I reconnected it, the wipers, radio and roof stopped working. Fitted a new SIM85 and coded it in: everything back to normal.

Hence my suggestion that you unplug the SIM85 and see if other stuff starts
Click to expand...
Don't want to count my chickens but thought I'd check how the roof wiring repair was looking that I did before Xmas. Main repair is fine but 10" away by the hinge, the wires are almost severed. Think I'll cut a new section in and see what gives 🤔
 

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Good result!
Well maybe this next info is irrelevant now but anyway..............................

In the drivers side footwell is an earth comb. All the airbag modules AND the roof lowered switch earth there.
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Here's the wiring for the SBSR plug

A150a is the SIM85, I01086 is the clockspring connector at the steering wheel

1767969619833.png
 
Tried a quick fix but didn't work so going to strip the roof loom and check for other damage. Need to tick that off before moving on.

I stumbled across the earth combs when stripping out the carpets.

Will keep you posted
 
bigwinn said:
I have a spare good loom if needed
Click to expand...
That's very kind of you.

Will see if the repairs have worked today. Looks like I've not routed the loom correctly if its caused damage by the hinge mechanism.

I'll lower the next section of headlining and see if there's an obvious path.......or this is just another false lead with this car 😵‍💫
 
enuff_zed said:
The plug pins are numbered left to right, 1 to 9 top row, 10 to 18 bottom row.

The brown with red stripe is in pin 10.
The brown is in pin 11.

Apologies, not the best photos.

View attachment 289165
View attachment 289166
Click to expand...
We're looking at different connectors i think.

It's the offside with the cables hanging out.
Apologies if I said nearside 🙏

Mine are...
1 orange/yellow
2 orange
3 red
4 red/blue
5 red
6 red/blue
7 white/black
8 white/brown
9 blue/black
10 blue/grey
11 missing
12 missing
13 blue/black/yellow dash
14 missing
15 orange/brown
16 brown/black
17 white/yellow
18 blue/purple/yellow dash

May have got the odd shade wrong as grey looking at bit like brown but not far off.

In other news...

You were absolutely right. I've removed the instrument cluster, stripped it down and there was black tape covering the air bag warning light 😵‍💫

Previous owner who had the car 8 years and had a mate that owned a garage said he knew nothing about it.

I'd asked so that I could try and reduce hunting for the issues.

I now have an airbag warning light (red) on the dash that stays on......also an abs light but that may be another rabbit hole to go down.

If I can get these wires into the offside satellite airbag module i will have completed the circuit and see where to go from there 😬
 
OK, well both my photos and the wiring diagrams are for the right side.
To confirm: offside is UK drivers side. The SBSR is the one with the green socket. (The SBSL is yellow)
You are looking at the plug that connects into the SBSR at the rear of the driver's side inner sill?

If yours are all different colours then you have a much bigger issue, or someone has spliced in the wrong connector.
No chance there is a repair somewhere back along that part of the loom?

I'll go and dig the plug out again and give you a full breakdown of colours to each pin.
 
Here we go:
1 - Blue/Purple - Yellow band
2 - White/Yellow
3 - Brown/Black
4 - Brown/Orange
5 - EMPTY
6 - Blue/Black - Yellow band
7 - EMPTY
8 - EMPTY
9 - Blue/Brown
10 - Brown/Red
11 - Brown (NB. 10 and 11 twisted together)
12 - Red
13 - Blue/Red (NB. 12 and 13 twisted together)
14 - Red
15 - Blue Red (NB. 14 and 15 twisted together)
16 - White/Black
17 - White/Brown (NB. 16 and 17 twisted together)
18 - Blue/Black (NB. 9 and 18 twisted together)

If you look at the wiring diagram I posted you will see this exactly correlates.
Don't be put off by the '1' at the far left end; this is the fibre-optic connection.

At this point your wiring has me completely lost.
 
Only one other thing I can check really: I’ll make sure I have the correct wiring diagram for your age of car. Just in case the beggars completely changed it!
 
Definitely the correct wiring diagram. FWIW, I checked the SBSL too and your wire colours don't match that either.
 
enuff_zed said:
OK, well both my photos and the wiring diagrams are for the right side.
To confirm: offside is UK drivers side. The SBSR is the one with the green socket. (The SBSL is yellow)
You are looking at the plug that connects into the SBSR at the rear of the driver's side inner sill?

If yours are all different colours then you have a much bigger issue, or someone has spliced in the wrong connector.
No chance there is a repair somewhere back along that part of the loom?

I'll go and dig the plug out again and give you a full breakdown of colours to each pin.
Click to expand...
Yes definitely the sbsr (green socket)

I'll check to see if there are any repair sections further back
 

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OK then: reverse your numbers.
Then looking at my list and imagining it is yours in reverse we find (using my numbers, with yours in brackets) that 1(18) through to 8 (11) are the same.
9 (10) is Blue/Brown - I suspect yours is too, but looks grey?
13(6), 14 (5) and 15 (4) are the same.

Now we'll look at the colours left over:

Brown/Red - 10 on mine, unplugged on yours
Brown - 11 on mine, unplugged on yours
Red - 12 on mine, 3 on yours
White/Black - 16 on mine, 7 on yours
White/Brown - 17 on mine, 8 on yours
Blue/Black - 18 0n mine, 9 on yours

So that leaves two odd orange wires in your 1 and 2 which don't exist anywhere on mine. Maybe been added to bypass the two brown ones?

So, if it were me, I think your next step would be to repin the plug to match my list (making sure you have it the right way up ;) ), then disconnect the two orange wires and refit the two borwn ones in their correct places)

You should then end up with a plug with gthe same order as in my list and as per the wiring diagram.

Be useful to find out where the two orange wires go wouldn't it.

Also check the cutout switch beside the battery to be sure that hasn't been tampered with.

CAVEAT! I OFFER ALL THIS ADVICE WITH THE BEST INTENTIONS, BUT IT IS YOUR DECISION IF YOU ARE PREPARED TO RISK A BIG BANG!!!
 
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