AIRBAG light
10-13-2007, 09:05 PM
#21
ATTACHED PDF FOR AIR BAG SYSTEM
You must rename the file extension back to .pdf. I had to change it to due file size limits.
I do not know if the airbag module knows if the LED is not working. You would need the LED to verify the system is working. As long as the SIR light is off after 7 blinks the other airbag should inflate as the deployment loops are seperate.
Most any Red LED should work for you as long as it fits [same size].
If the SIR system doesn't pass the self test you have no idea if it will inflate at all.
You are going to want those four 5ohm resistors and a 0-100 ohm linear pot. All in parellel
I noticed that the very generic range my Airbag diagnostic PDF gave didn't work. "It wants more than 3.7 ohms and less than 6." So I put a 0-100 Ohm pot in parellel with the whole circuit to play around with it.
I ended up getting the light to go off with a resistance of about 1.1 Ohms. Why there is a difference from what worked for me to what the PDF said I have no idea. Maybe it was because I didn't consider the wiring and the airbag module in that 3-6 ohms. Maybe the PDF was wrong. I measured directly acrost the load with a multimeter not from the module under the console. That is extra resistance right?
If you try the resistors in parellel and the 0-100 ohm pot I will warn you that tuning the circuit will be like trying to get a hen to lay golden eggs.
Here is a plot. Note how 1.1 ohms won't be easy. I used a 14 turn pot and it took about 7 ignition cycles to get it to work.
I think you will be able to achieve the same results I did with a trip to the parts store and some tinkering. It isn't rocket science but no one has documented what to do enough. Sorry for the confusion.
I just don't know if exactly 1.1 ohms will work on every car out there. If you want out 1.1 ohms works maybe we can come up with more certain instructions.
I only tried it on my car and the guy I sold it to. No complaints yet.
You must rename the file extension back to .pdf. I had to change it to due file size limits.
No. What I ended up doing is just opening the IP and putting black electrical tape over the Service Vehicle Soon light on the IP surface.
It has gone through 2 inspections (even with our ***** here) without a question being asked. I guess when they plug into the OBD2 port it DOES NOT connect/interface with the BCM like it does with the ECM.
I may still try the solution you came up with, but it may not work since my AIRBAG bulb is broken out of the IP, with no "jumper" or new bulb in it's place.
One question; do you think with your solution that the system would be fooled to the point of keeping the passenger airbag functional/deployable, EVEN with NO airbag on the driver's side???
It has gone through 2 inspections (even with our ***** here) without a question being asked. I guess when they plug into the OBD2 port it DOES NOT connect/interface with the BCM like it does with the ECM.
I may still try the solution you came up with, but it may not work since my AIRBAG bulb is broken out of the IP, with no "jumper" or new bulb in it's place.
One question; do you think with your solution that the system would be fooled to the point of keeping the passenger airbag functional/deployable, EVEN with NO airbag on the driver's side???
I do not know if the airbag module knows if the LED is not working. You would need the LED to verify the system is working. As long as the SIR light is off after 7 blinks the other airbag should inflate as the deployment loops are seperate.
Most any Red LED should work for you as long as it fits [same size].
If the SIR system doesn't pass the self test you have no idea if it will inflate at all.
I noticed that the very generic range my Airbag diagnostic PDF gave didn't work. "It wants more than 3.7 ohms and less than 6." So I put a 0-100 Ohm pot in parellel with the whole circuit to play around with it.
I ended up getting the light to go off with a resistance of about 1.1 Ohms. Why there is a difference from what worked for me to what the PDF said I have no idea. Maybe it was because I didn't consider the wiring and the airbag module in that 3-6 ohms. Maybe the PDF was wrong. I measured directly acrost the load with a multimeter not from the module under the console. That is extra resistance right?
If you try the resistors in parellel and the 0-100 ohm pot I will warn you that tuning the circuit will be like trying to get a hen to lay golden eggs.
Here is a plot. Note how 1.1 ohms won't be easy. I used a 14 turn pot and it took about 7 ignition cycles to get it to work.
I think you will be able to achieve the same results I did with a trip to the parts store and some tinkering. It isn't rocket science but no one has documented what to do enough. Sorry for the confusion.
I just don't know if exactly 1.1 ohms will work on every car out there. If you want out 1.1 ohms works maybe we can come up with more certain instructions.
I only tried it on my car and the guy I sold it to. No complaints yet.
10-13-2007, 09:54 PM
#22
This info was in the Attached PDF about a bad SIR light....
DTC B0670: AIR BAG WARNING LIGHT MALFUNCTION
Circuit Description
Instrument cluster internally monitors AIR BAG warning light
when power is supplied to instrument cluster. Instrument cluster
flashes AIR BAG warning light 7 times then turns off to check light
circuit operation.
Conditions For Setting DTC
DTC sets when instrument cluster detects a malfunction AIR
BAG warning light during bulb test. Only an open in the AIR BAG
warning light will be detected.
Circuit Description
Instrument cluster internally monitors AIR BAG warning light
when power is supplied to instrument cluster. Instrument cluster
flashes AIR BAG warning light 7 times then turns off to check light
circuit operation.
Conditions For Setting DTC
DTC sets when instrument cluster detects a malfunction AIR
BAG warning light during bulb test. Only an open in the AIR BAG
warning light will be detected.
10-14-2007, 02:49 PM
#23
!! thank you !!
that airbag pdf is full of information.
after i throw my momo wheel in, this makes me want to stick the driver airbag under the passenger seat with a push-button activation (i'll label it "NOS" and put it in the center console where the passenger can reach it). or maybe stick it in a tube for a custom airbag cannon. jk...
that airbag pdf is full of information.
after i throw my momo wheel in, this makes me want to stick the driver airbag under the passenger seat with a push-button activation (i'll label it "NOS" and put it in the center console where the passenger can reach it). or maybe stick it in a tube for a custom airbag cannon. jk...
10-16-2007, 01:44 AM
#25
welll... i got away with cramming 4 10ohm (1/4 watt i think like 5% variance) resistors onto the thing that plugs into the airbag. then i just wrapped that with a little electrical tape and stuck it through the aftermarket hub adapter....
end result... airbag light does the blinking diagnostic thing, then stays off.
and the aftermarket steering wheel is in
thanks for your help, 2002_Z28_Six_Speed!
end result... airbag light does the blinking diagnostic thing, then stays off.
and the aftermarket steering wheel is in
thanks for your help, 2002_Z28_Six_Speed!
10-17-2007, 07:09 PM
#28
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welll... i got away with cramming 4 10ohm (1/4 watt i think like 5% variance) resistors onto the thing that plugs into the airbag. then i just wrapped that with a little electrical tape and stuck it through the aftermarket hub adapter....
end result... airbag light does the blinking diagnostic thing, then stays off.
and the aftermarket steering wheel is in
thanks for your help, 2002_Z28_Six_Speed!
end result... airbag light does the blinking diagnostic thing, then stays off.
and the aftermarket steering wheel is in
thanks for your help, 2002_Z28_Six_Speed!
That's my next project (along with reinstalling the AIRBAG LED into the IP).Did you use the Momo #2401 adapter??
10-19-2007, 04:05 PM
#29
i got the 2401 adapter, but when you tighten the nut there is clearance issues (signals activating and the sound of grinding plastic during tighter turns).
for $30 more, thunder racing sells a machined hub (2401-f) which resolves the clearance issue. i bought that after a day of fumbling with the original momo adapter.
while waiting for the machined hub, my temporary solution was to not tighten the nut all the way (used too much loctite which did the job but made removal a pain in the ***) and leave a fingernail-thick gap between the hub and the column.
for $30 more, thunder racing sells a machined hub (2401-f) which resolves the clearance issue. i bought that after a day of fumbling with the original momo adapter.
while waiting for the machined hub, my temporary solution was to not tighten the nut all the way (used too much loctite which did the job but made removal a pain in the ***) and leave a fingernail-thick gap between the hub and the column.
10-19-2007, 04:44 PM
#30
Wheel looks great!!
Could of been the variable in the resistors. I think no band means 25% where your gold banded 5% might of been worth the investment.
I just got minorly rearended today so if I get one on these I'll be looking for the airbag version from Momo. More weight but there are too many teenie boppers on the roads with SUVs. uff
Could of been the variable in the resistors. I think no band means 25% where your gold banded 5% might of been worth the investment.
I just got minorly rearended today so if I get one on these I'll be looking for the airbag version from Momo. More weight but there are too many teenie boppers on the roads with SUVs. uff
10-21-2007, 01:39 PM
#31
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10-21-2007, 01:43 PM
#32
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03-20-2013, 01:59 PM
#33
Bringing this back from the dead...
From the air bag pdf I got this from it:
DTC B0016: PASSENGER DEPLOYMENT LOOP RESISTANCE LOW
Sets with < 1.3 ohms, Clears with > 1.3 ohms
DTC B0017: PASSENGER DEPLOYMENT LOOP OPEN
Sets with > 3.7 ohms, Clears with < 3.7 ohms
DTC B0022: DRIVER DEPLOYMENT LOOP RESISTANCE LOW
Sets with < 1.3 ohms, Clears with > 1.3 ohms
DTC B0026: DRIVER DEPLOYMENT LOOP OPEN
Sets with > 4.8 ohms, Clears with < 4.8 ohms
PASSENGER's side needs to be 1.3 - 3.7 ohms
DRIVER's side needs to be 1.3 - 4.8 ohms
So 2.5 ohm is a nice middle ground for both air bags. (2) 5 ohms or (4) 10 ohms in parallel (as mentioned before) would do the trick.
From the air bag pdf I got this from it:
DTC B0016: PASSENGER DEPLOYMENT LOOP RESISTANCE LOW
Sets with < 1.3 ohms, Clears with > 1.3 ohms
DTC B0017: PASSENGER DEPLOYMENT LOOP OPEN
Sets with > 3.7 ohms, Clears with < 3.7 ohms
DTC B0022: DRIVER DEPLOYMENT LOOP RESISTANCE LOW
Sets with < 1.3 ohms, Clears with > 1.3 ohms
DTC B0026: DRIVER DEPLOYMENT LOOP OPEN
Sets with > 4.8 ohms, Clears with < 4.8 ohms
PASSENGER's side needs to be 1.3 - 3.7 ohms
DRIVER's side needs to be 1.3 - 4.8 ohms
So 2.5 ohm is a nice middle ground for both air bags. (2) 5 ohms or (4) 10 ohms in parallel (as mentioned before) would do the trick.
03-20-2013, 04:25 PM
#34
SENSING & DIAGNOSTIC MODULE (SDM) Requirements:
1. The part number must match what came in the car
2. The VIN stored in the SDM must match the vehicle's VIN
3. If the SDM ever activated airbags, it must be reset to be used again.
4. The SDM must "see" airbags on the other end of those wires
karman auto can take care of items 2 & 3
One thing about this module is that it stores a snapshot of what the car was doing at the time the SDM activated the airbags. So if you are going 150 mph and crash, this thing will record it. Check out "air bag crash" for a list of all the stuff that's recorded.
1. The part number must match what came in the car
2. The VIN stored in the SDM must match the vehicle's VIN
3. If the SDM ever activated airbags, it must be reset to be used again.
4. The SDM must "see" airbags on the other end of those wires
karman auto can take care of items 2 & 3
One thing about this module is that it stores a snapshot of what the car was doing at the time the SDM activated the airbags. So if you are going 150 mph and crash, this thing will record it. Check out "air bag crash" for a list of all the stuff that's recorded.
