Airbag controller removal
11-18-2009, 10:37 PM
#1
Rennlist Member
Thread Starter
Airbag controller removal
Ok... so I have been living with the airbag light for awhile now (both airbags are disconnected, it’s a racecar). I want to disable/remove the controller altogether, not just to fool it into thinking the airbags are there with resistors.
After much searching I came up with a 928 part number that was supposed to bypass the controller (you can’t just remove it as the DME is powered through it), unfortunately it was not right.... My solution was to remove the controller and create my own jumper plug to bridge pins 5 (Power +) and pin 20 (Output to DME).
Seems to work fine. Anyone try this? Think I overlooked anything?
Thanks for the advice
Jeff
After much searching I came up with a 928 part number that was supposed to bypass the controller (you can’t just remove it as the DME is powered through it), unfortunately it was not right.... My solution was to remove the controller and create my own jumper plug to bridge pins 5 (Power +) and pin 20 (Output to DME).
Seems to work fine. Anyone try this? Think I overlooked anything?
Thanks for the advice
Jeff
11-24-2009, 03:45 PM
#3
Seared
Rennlist Member
Rennlist Member
11-24-2009, 03:48 PM
#4
Race Car
Was there any form of circuit protection provided by the airbag controller, if not your solution is a plausible one.
I assume that the DME get s power via the control unit that in case of an accident and the airbags deploy that power is cut to stop the car.
I assume that the DME get s power via the control unit that in case of an accident and the airbags deploy that power is cut to stop the car.
12-13-2009, 02:52 PM
#5
Rennlist Member
Thread Starter
12-13-2009, 02:59 PM
#6
Rennlist Member
Thread Starter
Now for the plug itself...
Removed the connector from the airbag controller.. and the rest goes in the trash (seems like a waste).
Trim all legs except pins 5 and 20 flush. As luck would have it (or great forethought) they are next to one another.
Bend the legs from 5 and 20 together and solder
Encase in your favorite silicone potting compound (I just use plain old hot melt glue)
Voila, no more airbag controller.
One thing I should mention... If you dont remove both airbags, you need to ensure you short the airbag firing leads together. Either in the plug or at the airbag. You dont want any chance of a static charge setting it off.
Last edited by jscott82; 03-19-2014 at 09:48 PM.
12-13-2009, 03:30 PM
#7
nice job. Hang on to the controller. the 993 part is nla and if replacement is needed the 996 part is over $400. They are fairly easily fried so I'd expect a market for them
Trending Topics
12-13-2009, 05:27 PM
#8
Seared
Rennlist Member
Rennlist Member
Now for the plug itself...
Removed the connector from the airbag controller.. and the rest goes in the trash (seems like a waste).
Trim all legs except pins 5 and 20 flush. As luck would have it (or great forethought) they are next to one another.
Bend the legs from 5 and 20 together and solder
Encase in your favorite silicone potting compound (I just use plain old hot melt glue)
Voila, no more airbag controller.
One thing I should mention... If you dont remove both airbags, you need to ensure you short the airbag firing leads together. Either in the plug or at the airbag. You dont want any chance of a static charge setting it off.
Removed the connector from the airbag controller.. and the rest goes in the trash (seems like a waste).
Trim all legs except pins 5 and 20 flush. As luck would have it (or great forethought) they are next to one another.
Bend the legs from 5 and 20 together and solder
Encase in your favorite silicone potting compound (I just use plain old hot melt glue)
Voila, no more airbag controller.
One thing I should mention... If you dont remove both airbags, you need to ensure you short the airbag firing leads together. Either in the plug or at the airbag. You dont want any chance of a static charge setting it off.
Andreas
02-07-2011, 12:03 PM
#12
Rennlist Member
Thread Starter
02-09-2011, 01:15 PM
#13
"I assume that the DME get s power via the control unit that in case of an accident and the airbags deploy that power is cut to stop the car."
Steven
So! That was known by the thread starter, i.e Hardly of any helpful value.
One can easily jump pins 5 & 20 (as previously noted) on the airbag ECU without having to buy any
special connector.
"Achtung Light would still be on."
Actually, the light with be 'off' as the ECU only grounds one side of the light.
The other side has #15 power (ignition sw.) Without the ECU, the airbag light with be off.
Steven
So! That was known by the thread starter, i.e Hardly of any helpful value.
One can easily jump pins 5 & 20 (as previously noted) on the airbag ECU without having to buy any
special connector.
"Achtung Light would still be on."
Actually, the light with be 'off' as the ECU only grounds one side of the light.
The other side has #15 power (ignition sw.) Without the ECU, the airbag light with be off.
02-09-2011, 08:47 PM
#15
"Loren, are you saying the pulling the airbag warning light bulb out will by itself keep the achtung light from illuminating?"
You are referring to the central warning (CW) ECU, right? Given that the CW
ECU must not indicate a problem, then just removing the airbag bulb won't
solve that. The airbag ECU grounds the airbag light (turns it 'on') when
there is a fault. That ground then commands the CW to turn its light 'on'.
So to prevent the CW light, the bulb must remain thus giving 12V to the
CW indicating no fault, i.e. the airbag connection to the airbag light must
remain disconnected (no ground).
You are referring to the central warning (CW) ECU, right? Given that the CW
ECU must not indicate a problem, then just removing the airbag bulb won't
solve that. The airbag ECU grounds the airbag light (turns it 'on') when
there is a fault. That ground then commands the CW to turn its light 'on'.
So to prevent the CW light, the bulb must remain thus giving 12V to the
CW indicating no fault, i.e. the airbag connection to the airbag light must
remain disconnected (no ground).