0055 Inflatable curtainIC right Resistance too high

[sbk1972]

Hi all,

Thought I would create a separate thread for this pain in the 4rse issue I am having.

Car is a C70 T5 2006. 89K. Air bag light is one, code above. So far I have :

Cleaned both side of the door wire plug
cleaned all connectors inside the door
Brought a second hand airbag and tried that
Used 1.6 / 1,8 / 2.2 / 3.0 and 3.3 resisters in the loop to try and fool it

But still this damn error continues.

Any suggestions ?


Can someone measure their drivers door air bag, resist wise, and tell me what they see ? If I measure the resistance on the original one I get nothing. 0. If I read the resistance on replacement one, 0.0 notihng. So have I got a broke replacement ?

I have totally had enough. Can air bags be switched off within VIDA ?

Can automatic lights be switched off in VIDA too ?

One of my xenons ballasts doesnt work so am waiting for a replacement but Im not having much luck in fixing things. So hoping this replacement is blown as well.

Simon...... fe

[Clan]

Originally Posted by sbk1972

Hi all,

Thought I would create a separate thread for this pain in the 4rse issue I am having.

Car is a C70 T5 2006. 89K. Air bag light is one, code above. So far I have :

Cleaned both side of the door wire plug
cleaned all connectors inside the door
Brought a second hand airbag and tried that
Used 1.6 / 1,8 / 2.2 / 3.0 and 3.3 resisters in the loop to try and fool it

But still this damn error continues.

Any suggestions ?


Can someone measure their drivers door air bag, resist wise, and tell me what they see ? If I measure the resistance on the original one I get nothing. 0. If I read the resistance on replacement one, 0.0 notihng. So have I got a broke replacement ?

I have totally had enough. Can air bags be switched off within VIDA ?

Can automatic lights be switched off in VIDA too ?

One of my xenons ballasts doesnt work so am waiting for a replacement but Im not having much luck in fixing things. So hoping this replacement is blown as well.

Simon...... fe

you must NEVER apply current ( via your ohm meter) to an air bag socket for obvious reasons you could kill yourself when it goes off.
you should use the volvo test resistor which takes the place of the air bag , that will determine if the problem is the air bag or not .

[sbk1972]

Where can I buy a volvo test resistor ?

[Clan]

Originally Posted by sbk1972

Where can I buy a volvo test resistor ?

volvo parts dept 9511506

or 9513028 is an alternative if you have one laying around.

you have tried 2 air bags , its highly unlikely one will be faulty let alone 2

have you checked the resistance of the two wires between the air bag socket and srs module plug?
If they are minimal then it will be the SRS module .

[sbk1972]

Thanks. I will give that a try ie. Loom from airbag to module.

Do these SRS modules often break ? I read that sometimes they display an internal fault error but mine hasn't got this. 0055

If I buy a second hand one do they need coding into the car ? Or is it wiser to have my own one repaired ?

Simon

[sbk1972]

Does anyone know what ohms the side airbags should be ? I've brought an airbag tester tool and wondered what the rough ohms level should be

[pinballdave]

The volvo special tool is not intended to replace an airbag, it is just connected to the airbag wiring and provides a known resistance that the airbag ECU can measure, and thus determine that the wiring loom is intact and that the resistance measuring ability of the airbag ECU is functional and accurate.

If you connect the tool (or a similar value resistor) it won't make the fault code go away, it's only needed so that you can run the test in VIDA.

SRS modules can fail, though I'd expect a wiring problem is more likely. There is an internal configuration eeprom inside which may need to be cloned if you are replacing with a second hand unit.

My C70 is currently SORNed due to a fault I haven't got round to fixing, but the electrics are fine. So if you want to pop over and try swapping bits to see if the fault moves from one car to the other it might be a simpler way to determine which parts are suspect.

[sbk1972]

Thanks pinball.

I've rang up several local Volvo specialists regarding this SRS issue and neither wanted to really get involved. So I pretty much on my own here hence buying one of these tools.

I've realised that my autel diag tool does actually switch the SRS light off but the fault means it returns in seconds

I plan to strip the console , interior next week and perform some tests.

[Clan]

Originally Posted by pinballdave

The volvo special tool is not intended to replace an airbag, it is just connected to the airbag wiring and provides a known resistance that the airbag ECU can measure, and thus determine that the wiring loom is intact and that the resistance measuring ability of the airbag ECU is functional and accurate.

If you connect the tool (or a similar value resistor) it won't make the fault code go away, it's only needed so that you can run the test in VIDA.

SRS modules can fail, though I'd expect a wiring problem is more likely. There is an internal configuration eeprom inside which may need to be cloned if you are replacing with a second hand unit.

My C70 is currently SORNed due to a fault I haven't got round to fixing, but the electrics are fine. So if you want to pop over and try swapping bits to see if the fault moves from one car to the other it might be a simpler way to determine which parts are suspect.

The test resistor is indeed supposed to replace the air bag that is the whole point of it. It simulates a good air bag...to eliminate it from the diagnostic process.

[Clan]

Originally Posted by sbk1972

Does anyone know what ohms the side airbags should be ? I've brought an airbag tester tool and wondered what the rough ohms level should be

I have already told you NEVER apply any current source to an air bag terminal... this is prominent in BOLD TEXT in the fault tracing in VIDA ! I assume you are reading that? An ohm meter applies a current to circuit.