Airbag deployment disco 3 - scary stuff

[Rangerrobbie]

Hi Guys

HELP HELP HELP....... This past weekend whilst at a game farm, just after I checked in, I started the Landy D3 SE and as I pulled off, there was this huge BANG. All the airbags down the drivers side from driver to rear of vehicle, including the drivers seat airbag were triggered. Now, I have never heard of this. I never touched or scraped a thing as the vehicle was in the open. Can anyone let me know what could have caused this. I just hope insurance covers this, as I see a huge expense coming.

Jaguar Land Rover South Africa have technicians looking at the vehicle currently and I have been lead to believe that this is the first incident of this kind in SA. Has anyone else had a similar experience in any other country.

 

[Festerer]

Do you know if its been an accident repaired vehicle? a lot of damaged vehicles are shipped over to SA from here in the uk . It might not have been repaired properly ? maybe causing the sensor to trigger ? i too have never heard of this problem .

 

[Datatek]

SRS is supposed to be pretty fail safe, there is usually a seperate feed to trigger each airbag plus front and side airbags use a different sensor.
I can only conclude the ECU has lost it's marbles.

 

[yellow90]

perhaps an earth problem from the live feed to the SRS ecu? it takes a minute amount of current to trigger the airbags its in the miliamps range I think
write the vehicle off and claim properly

 

[Datatek]

perhaps an earth problem from the live feed to the SRS ecu? it takes a minute amount of current to trigger the airbags its in the miliamps range I think
write the vehicle off and claim properly

Bit more than milliamps, the igniter is a bit like a lamp fillament, very short duration though.
There is a constant very low current through the igniter to confirm circuit integrity.
Nothing external should cause the SRS ECU to initiate a trigger pulse.

 

[yellow90]

Bit more than milliamps, the igniter is a bit like a lamp fillament, very short duration though.
There is a constant very low current through the igniter to confirm circuit integrity.
Nothing external should cause the SRS ECU to initiate a trigger pulse.

yes but my belief is that if the constant supply is interrupted it can cause a spike , hence airbags going off , has been known to happen when welding with batteries on but is very rare

 

[jacksta]

A few years ago a technician driving a customers 206 toward a ramp had the derivers airbag deploy.
The only thing it could be put down to was a failure of the clock switch, between steering wheel and column.

 

[Rangerrobbie]

JLR South Africa started stripping components from the vehicle for testing on Tuesday. I should start getting some feedback hopefully from them today, but I have my doubts as to if they will give me all the relevant feedback. I can only keep you guys posted.

 

[sierrafery]

it's deffinitely system error and as the car has no traces of accident LR should fix that IMO

 

[Datatek]

yes but my belief is that if the constant supply is interrupted it can cause a spike , hence airbags going off , has been known to happen when welding with batteries on but is very rare

Highly unlikely as the voltage/current is too low and there is protection against such an eventuality. You can plug/unplug the side airbag connectors on the P38 for example with no ill efects, indeed the connectors often come adrift when the seat is moved and just flag an airbag fault.
Welding is a different matter as large eddy currents are induced which can be very destructive.

 

[Rangerrobbie]

Hi All

Still waiting for LR UK to get back to LR SA with test results. Can anyone tell me if LR UK usually take this long to give feed back, especially when it comes to a problem as serious as this?

 

[Datatek]

Hi All

Still waiting for LR UK to get back to LR SA with test results. Can anyone tell me if LR UK usually take this long to give feed back, especially when it comes to a problem as serious as this?

Response time will depend on what they find. If the fault is serious there may be shared responsibility with the SRS ECU manufacturer. They will also be desperate to avoid a recall so will be looking at how to bull**** their way out of the problem.