OK, I give up. WIS help needed

[Stratman]

The seatbelt warning light doesn't come on when the front passenger seat is occupied and the belt undone. The driver's side is fine. I've spent a good hour fighting my way through the EPC and WIS (via the M-B Club) and come to the conclusion I'd find it easier to decode the Voynich Manuscript.

Can anyone well versed in navigating the EPC/WIS point me at the wiring diagram(s) for the front passenger seat occupancy/seatbelt systems?

The car is a W203207 C200CDI T-Modell.

 

[Mr. B]

Don't shout at me for saying this BUT why bother ?

If the warning light came on when the seat belt was worn then that would be annoying.

I could live with your fault.

 

[Stratman]

I'd never shout at anyone

It's the perfectionist in me, and a keen MOT tester may spot it as well.

 

[Mr. B]

I'd never shout at anyone

It's the perfectionist in me, and a keen MOT tester may spot it as well.

I doubt it's an MOT failure issue.

 

[shorty]

Has the seat pad sesor ever failed and been replaced with one of them little black box's instead of a new pad ?
I have fitted these to cars before and in doing so the seat belt reciever sensor has to be shorted ,this gives the car a reading that the seat belf is fastened . This would cause the car to not beep when the seat is occoupied and the seat belt not worn

 

[Stratman]

The seats are unmodified. The problem isn't a false positive, it's that there's no warning when there should be one. I just want to find the relevant wiring diagram to do some investigation.

 

[grober]

Had a quick look -- try document no pe91.60-p-2102-60fa

 

[Stratman]

Fantastic!!!

One day I'll figure out how to use it all, and remember that the 'Seat Occupancy Sensor' is called a 'Weight Sensing System'

Thanks again sir