So... the body shop probably disconnected the driver airbag pressure sensor without first disconnecting the battery and now I have a permanent fault with the airbag light on in the dash.

am i boned?

I have the Jag iCarSoft but when i try to resent the pressure sensor option it says my car is not supported.

Does the sensor need to be replaced, or do I need to find a better computer to reset this? Also, should I complain? They didn't admit to doing it... they did admit it wasn't on when they got it, and it popped up "while working on it".

Thx

 

What is the code?
Always start with what the car thinks is wrong.
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There are a few Diagnostic codes that have popped up- the main one here is:
B11AO-87
Left side restraints pressure sensor

There were a few other codes related to the seat or other stuff:
U0140-00
U2101-00
U0140-00

Thanks!

 

More specifics from the service manual:

B11A0-87
Left Side
Restraints
Pressure Sensor -
Missing message
Left impact
pressure sensor
circuit short
circuit to
ground, short
circuit to power,
open circuit,
high resistance
Refer to the electrical circuit diagrams and check the left impact
pressure sensor circuit for short circuit to ground, short circuit to
power, open circuit, high resistance

 

That's a tough one!!
Before I get into the details I always ask how old the battery is because when I see U codes those tend to be related to low voltage events.

That is one of a series of SRS codes and they all point to the left (Drivers Side) crash senor.
They are hard to find but look easy to change?

Here is the location of the 2 sensors from JPART.




The part number as always depends on the last 6 digits of your VIN.





I found a diagram and it looks like they are easy to get to. It's right under the plastic shield above the radiator.





Post back with the cost of the sensor and if that was the problem. But it points directly to the sensor so I would start by replacing it.
They don't go bad very often and I would look for a used one.
Here is a $20 sensor on EBay.
Front Crash Sensor

PS; I read your original message again and wonder if they simply did not connect the plug to the sensor? Easy to check.
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OMG Thank you. The left one is right where they were working. I paid for the work they did, but they said I should pay for their buddies to do the diagnostic to solve this... I am thinking this is 100% their responsibility. I am assuming they either disconnected it or cut the cable.

I will check tonight!

 

Your very welcome but you do owe us a final explanation to finish this thread up?
Pictures are a bonus too!

It would be a wonderful thing if you looked and it just was not plugged back in!
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update- the front left pressure sensor was connected and wiring (what was visible) looked ok. I don't see any physical problem with it.

I will also add the battery is relatively new and fully charged.

Does the code specify which left sensor is the issue?

 

Next thing since they are the same is to swap the sensor from side to side. If the code changes then I would change the sensor.
You could just have a sensor failure.

There is only 1 left sensor.
The age of the battery is not really the issue. You need to measure the resting DCV after the car has sat all night.
But let's fix one problem at a time as I don't think a battery problem would cause the crash sensor error.

One thing you have not mentioned is why was the car being worked on in that area and what did they do?
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I will check on DCV and swap front sensors.

As to what happened to the car....

I posted about it here:

https://www.jaguarforums.com/forum/x...y-nsfw-291274/

 

Update:
So we have been looking at the front left and right impact sensors- I swapped them and nothing different happened. I also removed them and checked to make sure they had resistance- both do. Dcv was 12.19.

I realize the code is specifically mentioning the "pressure sensor" which is in the door (impact pressure sensor).

 

Well the code says front crash sensor and the one your talking about is a side crash sensor (Number 8 in my above post)? That sensor is inside the front door and all your damage was to the front of the car?
There are front and rear door crash sensors (Pressure Sensors?) on both sides of the car.

If you look at the wreck picture from your other thread the front crash sensor is laying out in the open? How much damaged happened to the car to tear this off and drop it where it is?



I still think your problem is in this area as the front door is undamaged and was not repaired or messed with. In fact looking at this again I now suspect wiring damage from the wreck. More in depth troubleshooting of the wiring is where I would look now.

The fact that swapping the sensors from right to left did not change your codes also points to wiring damage on the drivers side of the car. The car can't see the drivers side front crash sensor because of this damage. Did you recheck for codes after swapping the sensor? If the sensor is unplugged completely do the error codes change?

If you do want to mess with and open up the drivers door to replace crash sensor I find these part numbers.



Note that a good battery should have a minimum of 12.6 VDC after sitting all night. Your battery is marginal at best. How old is it?
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UPDATE
Ok, I am pretty confident that this error is NOT a front impact sensor, but in fact the sensor in the driver door. That doesn't mean it's not a wiring issue.

My reason why I said this above is that the error code is clearly for a "pressure sensor", but the sensors in the front of the car are called "impact sensors" in the software and in the service manual. OK, maybe this is a pointless difference.

To confirm this, I simply unplugged BOTH front left and right impact sensors, and ran a diagnostic. I got 2 new codes:
B0090-87 - Right frontal restraints sensor
and
B0090-87 - Left frontal restraints sensor

Neither has the word "pressure" in it- in the service manual pic you have, only the sensor in the door is called a "pressure sensor".

Re: the battery- I had this replaced last year at the dealer. I checked again this AM (after a short drive) and it was 12.27. The car has been sitting a lot- at the body shop, and me messing with the codes. Maybe this is part of it- or maybe the dealer installed an old battery?

Also, the plug sitting on the front bumper is not the one for the impact sensor- I believe it is for the parking sensors on the bumper (which appear to be working correctly).

last thing- there isn't a fuse for this, is there?

 

That's not a parking sensor but good troubleshooting and keep following what you find. I think your getting close.
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I opened up the door and took out the LH pressure sensor. It was in securely attached. I removed it and tested it- it had resistance, and I believe this means it is working properly.

I decided to try to charge the battery before proceeding further.

I agree the wires did not connect to the parking sensors- they travelled through the front pumper to the passenger side of the car.

Thx!

 

It's a lot of work but you could swap the drivers side pressure sensor with the passenger side one and see if the code follows.
I have been inside the doors a bunch but never seen this sensor. Can you post a picture of what it looks like?
Interested to see if the battery changes things.
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Lol, you should have asked a day earlier! It sits under the trim. There is effectively a square hole in the middle of the frame, sitting below and to the right of the door actuator. The sensor housing faces this hole, and the sensor itself sits neatly in this hole. From observation and reading, I believe it is called a "pressure sensor" because if the two aluminum frames (outer and inner, where the sensor is placed), are pressed together in an accident, the air pressure change is measured by the sensor.
You are right- I probably should go back and open both doors and do this. These trim pieces suck to work with- there are these little rubber gaskets that keep stuff from vibrating and are a pain in the *** to put in place and constantly fall off.

 

UPDATE:
I took it back to the body shop and they switched the left and right pressure sensors as discussed above. Even though I tested the left sensor and it showed resistance, apparently, the swap resulted in changing the fault to the right side- confirming the sensor had failed.

Since you guys asked for what it looks like:



If you look immediately to the right of the door control wiring box, you will see a small cut out hole in the frame. This is where the sensor is placed (the white mart)

 

That is sure surprising that a sensor in the door detected the crash but the front crash sensors (One actually was ripped off it's mounting!) did not.
Glad to hear you got it fixed. I learn new stuff about these cars all the time.
Hopefully not too expensive?
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I could have just bought the part for $20 on ebay when I had the door open and that would be the end of it.

BUUUUUUT

As the car sat outside at the body shop for about 3 weeks, the other, non-impacted headlamp got really messed up in the sun. I complained and they took it back to fix. They also did the diagnostic above, and are asking $200 for the work. This includes the part- $180 from JLR (new).

Given that they did the work for something that was not really their fault, I was happy to pay them for this repair.