mattf14

Hello everyone!

I had a minor front end collision and both my front bags blew and the driver's pretensioner. My question is about the impact sensors. I am not familiar with these cars. Are the impact sensors the same as the "acceleration"sensors up front? And are they reusable or do I need to replace them both?
The reason I am asking is because I scanned the car with my generic scan tool and the only codes I am getting that aren't related to an airbag are; 8012- voltage supply below lower limit, c152- communication PSM contol unit, 80cb- triggering unit faulty, and 80f7- triggering event has taken place.

galaxy collision

im not sure what an "acceleration" sensor is, but if you were involved in a font end collision where the airbags were deployed you should replace the front impact sensors, clock spring and airbag controller as a general rule of thumb. contact a porsche certified collision shop. they should have free access to porsche OEM procedures for what exactly needs to be replaced.

Petza914

I don't know specifically in the 997, but in the Cayenne there is something called a Pyro fuse that blows in an airbag deploying accident that cuts power to the engine control harness and would throw these types of codes. If the car won't turnover with the starter, that's the reason. Also, all the seat belt pretensioners would have fired in the accident even if no one was occupying those seats, so you'll need new seat belts. Just with the airbag deployment alone, you're probably looking at $10,000 in repair without talking about body panels, lights, etc yet. You'll need to involve your insurance company.

voiceprint1

Sounds like a body shop that wants to repair a salvage car for resale to me.

mattf14

I see its a nice community here lol, trying to get a question answered. First of all I am not a body shop and if I was it wouldn't matter at all. There is nothing wrong with rebuilding a "salvage" car.

I wanted to know about the crash sensors. It wont cost me anywhere near 10k, only if I brought it to a dealership. In fact I already purchased all original airbag parts for under $500, minus the dashboard.
Thank you for your replies though.

Petza914

WOW, good for you at that price. Are you going to be rebuilding / repairing it yourself?

CAVU

for my 997.2, there are two dedicated front impact sensors. You access them by removing the front apron. They are probably yellow.

As far as your codes, some of those read like there has been an event.

AllDataDIY (inexpensive annual or 5 year fee) has a lot of info for the safety systems, which include the airbags and the tensioners. a small excerpt:

Component exchange after airbag/belt tensioner triggering

The following components must be removed and replaced after the airbag system is triggered:

Airbag unit, driver's side:

1. Contact unit.
2. Airbag unit, driver's side.
3. Triggering unit after the third time the airbag is triggered.

Airbag unit, passenger's side:

1. Airbag unit, passenger's side.
2. Triggering unit after the third time the airbag is triggered.
3. Instrument panel.
4. Check instrument panel bracket for deformation and replace if necessary.

Side-airbag unit, seat:

1. Side-airbag unit, seat.

1. Seat covering, deformed seat components.
2. Sensor for the side-airbag unit after the third time the side-airbag is triggered

Head airbag unit, door:

1. Head airbag unit.

1. Check door unit carrier for deformation and replace if necessary.
2. Sensor for the side-airbag unit after the third time the side-airbag is triggered

Belt tensioner:

1. All belt tensioner units.

Because it is difficult to visually determine if one or more belt tensioners has been triggered, check the following points:

• Using the PIWIS Tester 9718, read out the fault memory.
• Check plug connection on the belt tensioner for damage.
• Pull out the belt strap as far as possible and check for wear.
• Perform a function test on the automatic belt device.

mattf14

Yes, repairing myself.

mattf14

Thank you for this. When I'm done the car I'll let you guys know what's up and I'll post some pics

Burnman

The Trigger unit faulty codes can happen if the battery is disconnected, or goes dead when the key is in the ignition. The key does not have to be on, just in the ignition. Every time this happens the Airbag sees this as a "Crash" these modules will say the unit is faulty after 3 "Crashes". To reset them, they have to have the crash data cleared. Myairbags.com should also be able to clear crash data from a module that has seen a crash from the crash sensors. I have sent mine out to myairbags.com to get them reset. But there are other companies out there that do it. Here is a You tube link to get the airbag computer out if need be. In the description, there is another link for manual transmission. This link is for 997.2 PDK. I don't know of another way to reset. But I am sure people here in the community have other ways.

You Tube

kgb_kgb

Hi any update ?

is that a Pyro ?

I bought a salvage car that the passenger seat airbag on the side was deployed .

I can’t seem to start the car.

thanks

iwanta996

Burnman, I bought a 2007 997 that had side airbags deployed after a quarter panel collision. All paint and body work is now complete. Both seat belt tensioners have been replaced. All four crash sensors (sides and front) have been replaced, but to save money I installed used sensors from Specialized German Parts. Now my iCarSoft scanner tells me that all four sensors cannot be communicated with. I also sent the airbag control module to SafetyRestore.com to have it reset. I still see the dash airbag light and Passenger Airbag Off light in console. My body shop confirmed the error codes on his MacTools scanner.

So, are the used sensors the problem? Specialized German told me that the donor cars were not in airbag deployed collisions. I have to take their word on that, since there was no VIN to check. Thanks for your and others' help on Rennlist!