Skrevet av Emne: Airbaglampe lyser konstant  (Lest 4580 ganger)

mohpet

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Sv: Airbaglampe lyser konstant
« Svar #15 på: Tirsdag 22. Januar 2019, klokken 17:15 »
"- use a diagnostic tool to check for messages on the CAN bus"?
Maybe there is simply an error - maybe some of the sensors for the belts are not working, etc...
Thanks N, there is simply a cable going to the left seat sensor that has a short circuit. Fixing this solved the lot 😀
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BauDemo

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« Svar #16 på: Tirsdag 22. Januar 2019, klokken 19:44 »
Great find! Do you happen to make a photo?
Why was it short? Mechanical or heat?
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mohpet

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« Svar #17 på: ſøndag 03. Februar 2019, klokken 17:25 »
I was too fast there, I'm afraid. There was no short circuit, but there is something going on under the front seat with the wires. Moving them a bit makes the airbag light stay off, but this is no stable solution.
I find it hard to find the RAC, the carpet seems to be quite stuck and hard to remove?
How can I take the seat out, is this hard? In order to be able to check wires and attachments properly. I have a four seater.
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BauDemo

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« Svar #18 på: Mandag 04. Februar 2019, klokken 11:05 »
If your car has Gen 2 PCU, then it is the PCU that controls the airbag lamp and not the RAC.
The RAC on Gen 2 cars has nothing to do with the lamp. Look at the wiring diagrams.
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mohpet

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« Svar #19 på: Mandag 04. Februar 2019, klokken 11:58 »
If your car has Gen 2 PCU, then it is the PCU that controls the airbag lamp and not the RAC.
The RAC on Gen 2 cars has nothing to do with the lamp. Look at the wiring diagrams.
Thanks, that was informative! 👍
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mohpet

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« Svar #20 på: Lørdag 16. Februar 2019, klokken 16:27 »
Gir meg ikke helt på denne. Jeg leste meg opp til at det går ledning fra VCU ved rattstammen til airbag lampen. Ledning nr 5 som er oransje/grønn, i pluggen med 12 ledninger. Så min tanke var at dersom denne ledningen kuttes så vil lyset gå av. Jeg fikk bekreftet at det kommer strøm på den ledningen idet lampen tennes, så det virker riktig. Men når jeg kutter ledningen lyser fremdeles lampen, så dette hjalp ingenting. Var ikke det litt merkelig, tenker jeg feil her?
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« Svar #21 på: Lørdag 16. Februar 2019, klokken 18:04 »
On Gen 1 cars you need to short the pin to ground in order for the lamp to turn off. The idea is that if the wire is broken or cut the lamp will be "on" and you will be alerted that there is a problem with the system.
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mohpet

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« Svar #22 på: Lørdag 16. Februar 2019, klokken 20:07 »
On Gen 1 cars you need to short the pin to ground in order for the lamp to turn off. The idea is that if the wire is broken or cut the lamp will be "on" and you will be alerted that there is a problem with the system.
Thanks, how about gen2 cars?
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« Svar #23 på: Lørdag 16. Februar 2019, klokken 21:04 »
I could speculate that it is the same, but I have never tested it. Maybe you could test it via a resistor, so you don't blow up a fuse or something and see how it works.
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mohpet

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« Svar #24 på: Lørdag 16. Februar 2019, klokken 21:59 »
I could speculate that it is the same, but I have never tested it. Maybe you could test it via a resistor, so you don't blow up a fuse or something and see how it works.
Ok, but there is voltage on that lead when light is on, if I ground that lead there will be a short circuit won't it? 
How much resistance should the resistor have would you suggest? Something like this or more resistance with a std resistor?
 https://www.dioder.no/products/motstand-10w-1-stk
« Siste redigering: Lørdag 16. Februar 2019, klokken 22:35 av mohpet »
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mohpet

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« Svar #25 på: Onsdag 13. Mars 2019, klokken 20:23 »
I could speculate that it is the same, but I have never tested it. Maybe you could test it via a resistor, so you don't blow up a fuse or something and see how it works.
Yes, you were right. This solved the lot. Thanks.
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« Svar #26 på: Torsdag 14. Mars 2019, klokken 09:42 »
Great!
What resistor did you end up using?
Any photos on where you connected that?
Also - the fact that the light is on could mean that you may have some issues with the SRS system that need to be checked.
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mohpet

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« Svar #27 på: Torsdag 14. Mars 2019, klokken 13:42 »
Regarding fault on SRS, the light went on and off, related to passenger in seat or not, and buckle or not. Although no clear pattern and no clear fault, I rule out the SRS itself.

I ended up using this resistor, 39 ohms  10W.
https://www.dioder.no/products/motstand-10w-1-stk

In addition, I used a timer relay to make the grounding after some seconds.
https://www.dx.com/p/dc-12v-delay-relay-shield-ne555-timer-switch-adjustable-module-0-10s-2071121#.XIpNN1OUmdM

VCU box under steering wheel, towards side of car, just above pedals.

This is the wiring. Wire 5 on 12-pin coloured orange and green, to ground through resistor:
« Siste redigering: Torsdag 14. Mars 2019, klokken 17:46 av mohpet »
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