Need Pinouts/Schematic for Seat Connector To Install a Seat Occupancy Sensor Bypass

[Estoril]

I have two aftermarket seats in a track car, so the seat-side connector that a seat occupancy sensor bypass cheater connector connects to is gone with the seat. I need to install either the resistor or diode on the car-side yellow connector, but need to know which pins to work with.

Does anyone have those pinouts? Do I need to disassemble the connector to implement this?

Thanks!

[bmwfnatic]

Maybe not an exact answer to your question, but you can also code out the seat occupancy sensor using Ncs Expert, no hardware modding required then.

[Estoril]

Maybe not an exact answer to your question, but you can also code out the seat occupancy sensor using Ncs Expert, no hardware modding required then.

That is one route. My (potentially incorrect) understanding is that it would disable both airbags.

[heinzboehmer]

That is one route. My (potentially incorrect) understanding is that it would disable both airbags.

It supposedly doesn't disable them. It makes it so that both airbags deploy regardless of whether there's someone sitting there or not. But also I haven't crashed my car with it coded out, so no personal experience to confirm the behavior

But here's the wiring info. X279 is the yellow connector you posted a pic of, A113 is the module under the seat that serves as an interface between the airbag module and the mat, X10218 is the connector that goes from X279 to A113 and X01009 is the connector that goes to the mat (what you would usually plug the spoof module to).







A113 sends a occupied/not occupied signal out that ends up at pin 18 of X279. Haven't tried this, but presumably you should be able to make the airbag module think someone's in the seat by sending the correct signal on that pin.

Shouldn't be too hard to figure out what it wants. Pull the airbag module up in INPA and look at the status of the occupancy sensor, then apply ground to X279 pin 18 and see if it changes. Repeat with 5V at pin 18 if the ground signal didn't do anything and see if that triggers it.

Edit: This all assumes the signal that A113 sends out is a digital yes/no kinda thing. If it's analog then good luck figuring out what the airbag module expects to see

[Estoril]

It supposedly doesn't disable them. It makes it so that both airbags deploy regardless of whether there's someone sitting there or not. But also I haven't crashed my car with it coded out, so no personal experience to confirm the behavior

But here's the wiring info. X279 is the yellow connector you posted a pic of, A113 is the module under the seat that serves as an interface between the airbag module and the mat, X10218 is the connector that goes from X279 to A113 and X01009 is the connector that goes to the mat (what you would usually plug the spoof module to).


A113 sends a occupied/not occupied signal out that ends up at pin 18 of X279. Haven't tried this, but presumably you should be able to make the airbag module think someone's in the seat by sending the correct signal on that pin.

Shouldn't be too hard to figure out what it wants. Pull the airbag module up in INPA and look at the status of the occupancy sensor, then apply ground to X279 pin 18 and see if it changes. Repeat with 5V at pin 18 if the ground signal didn't do anything and see if that triggers it.

Edit: This all assumes the signal that A113 sends out is a digital yes/no kinda thing. If it's analog then good luck figuring out what the airbag module expects to see

Thanks very, very much HB !

[heinzboehmer]

Thanks very, very much HB !

No problem! Let me know how it goes