SRS ECU for 827 coupe

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CHR15E
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Re: SRS ECU for 827 coupe

Post by CHR15E » Tue Aug 22, 2017 7:52 pm

scoobyh123 wrote:
Tue Aug 22, 2017 6:56 pm
CHR15E wrote:
Tue Aug 22, 2017 4:37 pm
All I ever did was wire the SRS light to the PGM-Fi light. No one ever said anything, even when running aftermarket steering wheels which clearly had no airbag in them.
Since 2012 Chris they've changed the rules for our MoTs and if airbags are fitted they need to operate the warning light now. A non-operational w/light will usually bring an advisory. However it seems the rules in Sweden are different as Gunnar says he has to show the SRS lights working then going out.
I recently discovered someone had wired the ABS light to my PGM-Fi light on my Coupé so it apparently performs the MoT check but gives no clue about the real status of the ABS system which does in fact appear to work anyway!
Yes, I did the same for the airbag as you found for your ABS.
Chris
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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Tue Aug 22, 2017 8:50 pm

You're right Gunnar that it's less work to remove the fusebox in terms of fasteners to be removed. However it is so much quicker and easier to remove the instrument cluster and much more space around it that it makes more sense and while it's out you can attend to any blown bulbs in it. :wink: :D
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Wed Oct 04, 2017 11:31 am

To take out the SRS ECU you need special tool
18 B 1665 which is a resistorx screwe.
Anyone who knows what size that is T6,T8, T9 or...
Gunnar

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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Wed Oct 04, 2017 12:32 pm

Is it a normal Torx screw Gunnar or what i know as a "Security Torx" screw?

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The difference being the spigot in the centre of the security version and the "normal" Torx heads being open in the middle.
Cheers,
Dave

'02 Honda CR-V SE Executive
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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Fri Oct 06, 2017 5:52 pm

I managed to take out the SRS ECU from behind the center console on the 820 and on the 827. Not the same partnumbers..

It has part number YWC 10151, which is the same as for a LandRover P38.

You can find them on ebay but only second hand, Sellers say they are tested.

Any ideas where you could fiind a new one?

Anyway, tomorrow I will test to splice-in the 7-seconds relay to the gren no 2 SRS Cable in the under dash fusebox. First on the spares only 820 and if that goes well on the 827.

Vheers and happy friday evening everybody
Gunnarbi

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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Fri Oct 06, 2017 5:56 pm

Forget to tell that the part no for the SRS ECU on the 820 is AMR 4905

Are they interchangable?

Gunnar

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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Fri Oct 06, 2017 6:24 pm

It would seem they are interchangeable as that looked like a Land-Rover part number to me so i checked on Rimmers and it is :

https://www.rimmerbros.co.uk/Item--i-AMR4905

Not the sort of thing to buy with pocket change though! :shock: :wink: :D
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Sat Oct 07, 2017 5:28 am

You mean interchangable 820 with 827
or 820 with LandRover?
Gunnar

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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Sat Oct 07, 2017 10:39 am

As far as i know, the later SRS modules were Land-Rover units and it would seem that if you have a Land-Rover unit in yours, it's already been replaced so it looks like they are interchangeable.

I've been trawling through Rimmers to find the part number for the early 827 SRS DCU (SRS Deployment Control Unit) and found nothing so i'm guessing that like many other parts that went out of stock long ago and won't be replaced, there is no longer a listing for it. Got similar results when i tried allbrit.de although i did find the Mk2b (96 on) SRS DCU :

https://www.rimmerbros.co.uk/Item--i-YWJ101140

As you can see, i was then able to type the number into Rimmers and find it.

If it's any help at all, i've converted my Coupé to non-airbag spec and in the process of removing the impact sensors from the chassis rails, DCU from under the centre console and the final bit will be making a shelf to replace the passenger airbag. This is on the grounds that if it isn't fitted, it can't fail the test and it was optional here in the UK for a lot of the 827 Coupés production life. Sadly it did become standard later, when i'm not exactly sure but i don't like airbags and feel safer without them! :wink: :D
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
'95 827 Coupé LPG gone but not forgotten!

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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Sat Oct 07, 2017 2:59 pm

Tried to splice in a 7-seconds relay to the SRS-Circuit in the under dash fuse box. Did not work.

However it worked when I spliced the fused in to the instrument panel that I had taken from the 820.
This means I have to lift out the instrument panel from the 827 and splice in the relay to the 2 green wires and 1 grey wire that goes into the backside of the instrument panel.

When working with this I suddenly saw that the S4 lamp turned on and I coud count to 12 blinks on the gearbox ECU.

Anyone knows what 12 blinks mean?

Cheers
Gunnar

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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Sat Oct 07, 2017 3:03 pm

should be
"However it worked when I spliced the relay into the instrument panel that I had taken out from the 820."

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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Sat Oct 07, 2017 4:03 pm

First of all Gunnar, i'd remove fuse "S" from the underbonnet fusebox for 30 seconds, refit and take it for a run then re-check it.
It actually says the symptoms are "Lock-up clutch does not engage" and it points to a fault Hot Restart Unit, which is under the main PGM-Fi ECU under the drivers seat (on RHD cars, so probably passenger seat on yours) and is sort of "piggy-backed" onto the PGM-Fi ECU.

However, before you go chasing a fault with that, i'd strongly suggest you check all the fuses, preferably by renewal. I'm getting the impression the previous owner knew he'd made a pigs ear of things putting the Dexron in there when the S4 light came up when it shouldn't and set about finding ways to mask it so he could sell the car and pass the problem on.
Once you've checked the fuses and replaced all those that are doubtful, you may well find you have a few more warning lights on. This is no bad thing as it will give you more of a clue what actually needs doing. Yes it probably means more work but at least then you'll know everything is right with the car!

I had a similar story with my Coupé, so many bodges and bad repairs it's a wonder it actually went, stopped and did what it should without being a total deathtrap!

Happily it's all sorted now but i'm still half-wondering if there's something i've missed and another bodge will be revealed!
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


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'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
'95 827 Coupé LPG gone but not forgotten!

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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Sat Oct 07, 2017 4:46 pm

Thanks again Dave!

"Lock-up clutch do not engage". Is this not connected to a probable fault in the lock-up solenoid?

For tomorrow:
1. OK, I will take out the S fuse first, wen I do that should the battery be connected?
2. Check the fuses
3.Do a trial run to get the gearbox oil warmed up
4. Change the gearbox oil
5. Do a new testrun
6. Attack the SRS-lamp and try to splice in the relay behind the instrument panel
7. Keep my fingers crossed.

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Re: SRS ECU for 827 coupe

Post by SEGUBJO » Sat Oct 07, 2017 5:06 pm

More questions:

In the Engine bay fusebox there are 6 relays, where no 2 is for the cooling fan.
In my car no 2 relay is missing, but I read somewhere that when 2 cooling fans are fitted this no 2 relay is replaced by a bigger relay that sits behind the rhd main front lamp.

Any comments?

Gunnar

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Re: SRS ECU for 827 coupe

Post by scoobyh123 » Sat Oct 07, 2017 5:49 pm

Given the gearbox (EAT) ECU wasn't letting the LED flash the code up Gunnar, i'd say it was down to lack of power to part of the gearbox ECU, hence my suggestion of checking/replacing the fuses.

Probably best to pull fuse "S" after checking the other fuses, no real need to disconnect the battery at this point. You may find once you've checked/replaced the fuses that the SRS lamp works as it should so you might not have to do any splicing at all.

Other than that, good plan and you're right about the cooling fan relay. :wink: :D
Cheers,
Dave

'02 Honda CR-V SE Executive
'99 Jag S Type 3.0 V6 SE


Image
'94 827 Sterling saloon
'88 Volvo 760 V6 Estate
'95 827 Coupé LPG gone but not forgotten!

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