airbag - resistance measurements?

[farmboy]

i had the airbag code cleared and it didn't reappear until i had a passenger in the car (obviously changing the belt state to locked). my fault seems to be in the passenger side.

i saw this tech blurb over at pca...

q: The air bag warning light stays on. What would the most likely cause be?

a: The most likely cause is the seat belt buckles. They have a small resistance window in the control unit for the airbag and if it goes out of that window, the airbag light will come on. Porsche has been taking care of the airbaga light as a goodwill gesture since they have had so many problems with the seat belt buckles. You will have the harness updated under the seats and gold connectors install in the harness. New buckles with gold connectors will be installed, eliminating the resistance problems with tin connectors.

so this begs the question.... i took out the seat and measured the resistance (between the two pins in the connector). i was surprised to see 100ohms with the buckle in, and 400ohms with it out. i would have expected more range than that. what kind of values are people seeing in their failed and new gold plated switch equiped belt latches?

[Tool Pants]

Never measured it but here is some info. http://www.renntech.org/forums/index.php?s...opic=206&hl=ohm

[farmboy]

well would you look at that!

that schematic is showing exactly what i measured on my belts last night.

curious that they didn't use higher resistance values. like 1k and 100k or something. this is probably why so many people are having problems.

so i suppose if you measure your latches and they meet the design, then the problem is actually somewhere else, like the connectors in the harness or the harness itself.

[farmboy]

question: if i wanted to measure the seat belt latch sense at through the sum of the harness (at the engine control box) where would that be - and what connectors/pins?