Parker 7, I am in no real rush so Please see what you can find. I will gladly pay for the resistors and mailing to FL

Thanks
Dan

 

Free

Researching

 

My airbags were fired off and not replaced by the previous owner before I bought the car

I have replacement airbags and before I hook them up will insure the module is not still in firing state

So when your replacement module is received you can do the same assuring that the received module is not in firing state

Send me a PM with your address

 

Small 5W resistors will be ok, thats what I used. The module looks for resistance between 0.7-4 Ohms. That way it knows if the airbags are actually connected. If the airbag or clockspring in the steering column went open circuit, the module would deactivate the system and show the airbag warning.

Dan: Since you have a physically burned module, you may have a shorting fault of some kind. You can at least do some tests without a module. You can disconnect the airbags, put the resistors in the sockets and look for 2.5 ohms on the module plug pins. That would insure connectivity through the clockspring at the module. You can test the crash sensors and safing sensors in a similar way, looking for continuity or ground as appropriate (and without any resistors). All of the necessary info about the wire colors and pin locations is in the Dummies guide. Just takes some studying to logicize it all. DO NOT try to measure the airbag resistance using the multi-meter. That could set it off in an uncontrolled explosion!

Parker: if your airbags were fired off before, you will need a new module! It is only good for one actuation of the airbags. When you get a new module, be sure to open it and test for continuity on the tabs of the thermal fuse box. Labeled F1. Outer tabs = thermal fuse, continuity (very low resistance); inner tabs = 15 ohm resistor. I believe the thermal fuse is designed to be a weak point in the system, as it is a catch-all for shorting faults that could cause burning (like yours Dan), especially after an impact.

 

Have asked this in the X305 forum, so apologies for anyone who reads this twice.

I went through the tests in the airbags for dummies document, and the voltage feed to the safing sensor, and the return from the safing sensor, was reading zero volts. All other tests passed (including the other safing sensor voltage tests, all about 25% of the battery voltage). Any tips on what it could be?

Only other thing of note was that the crash sensor voltages were all the same, and all constantly about a volt lower than the battery voltage.

 

Thanks , I have to remove a glove box surround panel ( with my color as I found one ) as a replacement off of a salvage X300 and will have to confirm or reselect a different salvage X300 for a non - fired module

So that means I can remove , open up , and play with the original module

Fortunately, the yard I use has about 4 X300s in different body states

 

I used Brendan's "Air bag diagnostics for dummies" and was extremely happy to be able to get the problem sorted out.
For Australian members JAYCAR carries 2.5 ohm resistors