passenger weigh sensor

Tried that already Craig. Acers have an ongoing keyboard malfunction, i.e. random non-working buttons so I've used an external keyboard for the last year. The next stage would be to go for a complete reformat and chuck in a new OS, although the company I do the tracking work for is owned by an IT company and I've got their lads looking out for me. Something about 2 years old etc.

I am an idiot I will try that and see what happen. It is a 2010 Chevy Traverse.

Howie you should be able to get a replacement keyboard for less than 40 USD.  They are very easy to change.  Usually less than 8 screws and a single ribbon cable connection.