I now have a part number for the B Pillar occupancy sensor, as I had a chat with Andy at Autoreserve Jaguar Parts in Derbyshire, although they don't currently have one in stock.
The part number is: HJE9681GBNED, with the NED being the colour code of the outer grill facia.
Any colour would do me, as I would be swapping the internals over anyway.

In the meantime, if anyone does have a testing procedure for the B Pillar sensor 'in situ', that would be great, and allow me to confirm if it is that part which has actually failed.

 

Thank you very much for this useful thread. I have code 17 fault but in a S-Type 4.2 of the same vintage, there is scant information about it on any S-Type forum I frequent though. I am hoping the cars have a similar arrangement in the SRS system setup.

I followed the steps for testing the ACM and the results were that the warning light illuminated when I lifted my weight from the seat, but not when I moved close to the dashboard, or when I covered any of the three sensors.

How can I test that the three sensors are working before I go about trying to replace the module?

Thanks again!

 

I can't really help much unfortunately, as I only had a problem with the 'B pillar' sensor.
As I had no ideas on how to test it, I removed the rear quarter internal panel, which contained the 'B pillar' sensor to have a look and found that the electrical connector to the sensor wasn't plugged in properly.
Once I had pulled the connector out and re-connected it, the airbag light went out and thankfully hasn't played up again.

Sorry I'm unable to help, but I hope you're able to sort it .......

 

I can't really help much unfortunately, as I only had a problem with the 'B pillar' sensor.
As I had no ideas on how to test it, I removed the rear quarter internal panel, which contained the 'B pillar' sensor to have a look and found that the electrical connector to the sensor wasn't plugged in properly.
Once I had pulled the connector out and re-connected it, the airbag light went out and thankfully hasn't played up again.

Sorry I'm unable to help, but I hope you're able to sort it .......

 

Thanks Tony, the was working perfectly when I put it to sleep last winter. Then when I woke it up for the first drive of the year it decided something was wrong with the airbags. Don't you love cars

 

Yes, that is really annoying, especially when nothing has happened except for a fault appearing.

From what I can remember, the working occupancy sensors give out a high frequency when powered and working. Maybe you could use your phone to record any frequency produced and view it as an oscilloscope sound recording.
Just a thought, to see if you can identify a sensor fault, before delving deep into the bowels of the Jag, looking for the control module.
Good luck

 

Info about SRS.