I have a 2001 Mercury Sable that was recently in a wreck. Now the repairs have been done and it is flashing the air bag code 4 7. I had it scanned, which came up with a DTC of B1881 - Seatbelt Passenger Pretensioner Open Circuit.
I have removed the electrical plugs from under both seats, cleaned them and replaced them. I have also had the code cleared, but it returned immediately.
Any ideas of what I can do to fix this issue?
There is probably a broken wire somewhere in the belt or the control panel. You would have to actually trace all the wiring or test all wiring with ohmeter. You should just pull the dash and take out the bulb, or elese take out all fuses for the system
Dear 3mac, Wed 2-11-2009 3:09pm EST (USA)
Seat belt and Air Bag Systems repair is an intricate and complicated process. Trying to do it yourself could cause other seat belt/air bag system problems!
If you insist on doing it yourself, I would recommend researching the procedure carefully before trying anything yourself. I do not recommend doing it yourself!
Living with the error code is unacceptable since it's probably fired the seat belt tension-er charge due to your accident even though the air bag did not deploy. This means your SEAT BELT WILL NOT TIGHTEN IN ANOTHER ACCIDENT!
Please get this fixed by a reputable repair service ASAP!
jack
The repairman forgot to reset the airbag sensor unit to factory specs.
You will need to replace the complete retractor and belt.
seat adjustment limit switch
air bag deployment inhibitor circuit
crash sensor
seat belt buckle switch
Crash sensor relay
Check the above items
A holding circuit through the seat switch maintains the relay switch open. Thus, the seat belt must be buckled after sitting down in order to provide the pulse of current to initially close the relay switch and to provide the continuing current to keep the relay closed
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One of the sensors that signals the airbag to deploy has to be either replaced or reset. It has narrowed it down for you and has told you that your issue is on the passenger side of the vehicle. I believe that it is connected to your seat belt assembly as many safety systems are set up to work in balance with the seat belts. Passenger Pretensioner Open Circuit tells me that the sensor is still triggered. This is a serious issue because of the fact that if the sensor is triggered to a certain degree then it is very possible that hard braking, going over speed-bumps or even hitting a pothole could completely engage the system and fire off one of the airbags. I have a phone call made to a friend of mine that is a great Ford repair mechanic and I will include his comments in this message in the next few minutes. Thanks
I spoke to the mechanic I know and he said that there is sensor in the Retractor Assembly in the seat belt assembly that has been triggered open and needs to be replaced. He also said that before tearing it down to get to it that he suggests you find a schematic online to locate exactly where the pretensioner assembly circuit is. It can be in two places according to him. In the retractor assembly or in the base of the shoulder harness assembly. He said that there will be evidence of the assembly where a wiring harness is found leading into the retractor or the base assembly. That is where it is found and should be replaced. As soon as the open circuit is closed with the replacement part the reset will take and it is permanently repaired.
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Get it checked at the local diagnosis center for very negligible fee/cost.and get it replaced.as its necessary to replace the unit to make it work.but just get it confirmed before replacing it.
Welcome to Fixya! This is a Common Error Code that Shows whenever there is an Accident. You will need to Replace the ENTIRE Tensioner Assembly on that Side. Anytime the Tensioner Has to do it's Job, on the Newer Vehicles, after an Accident it will need to be Replaced to Get the Airbags working again. Please Rate My Response! Thanks!
Replace the sensor. That is what I had to do on my Ford. Even though I was not in a accident nothing I tried worked until I replaced the pretensioner circuit
Check the yellow wire under the front seats one of them must be lose.also check out other connecting wires as any of those wires must be definately loose as this error code coming up.
Hello, You probably have to replace the right seat pretensioner.
If you find this information to be correct would you please enter a "fixya" rating.
Thanks, Gator241
The restraints control module (RCM) monitors the resistance of the circuit to the passenger safety belt pretensioner. If the RCM detects a resistance that is out of the range on the passenger safety belt pretensioner circuits, it will store diagnostic trouble code(DTC) B1881 or B1886 in memory and flash, depending on the fault indicator, and lamp fault code (LFC) 47 depending on the fault (or higher priority code if one exists) on the air bag indicator.
Fault Conditions
The RCM monitors for the following fault conditions:
low resistance.
high resistance.
circuit open.
Possible Causes
A safety belt pretensioner fault can be caused by:
damaged wiring, terminals or connectors.
a faulted pretensioner.
a faulted RCM.
In plain English, the passenger seat belt buckle/pretensioner assembly is more than likely inoperative and needs to be replaced, unless the circuit to it is open. Hope this helps.
This code basically tells you that the passenger side seat belt pretensioner deployed. It is made into the seat belt buckle and what it does is when it deployes it pulls the seat belt tighter.When you had your accident there must have been a passenger in the seat with their belt buckled am I correct?
To verify this unhook the connector to the buckle and measure the reistance it is probably showing open ckt. the go to drivers side and unhook the connector there and measure resistance and you will probably se around 2.5 to 3 ohms. You will have to replace the buckle to correct it.
Here are your part numbers for the part depending on color
Black 2F1Z-5461202-AAC
Parchment 2F1Z-5461202-AAA
Graphite
Graphite 2F1A-5461202-AAB
The list price is $98.02
That first part of the last number should have been 2F1Z and not A
Yeah it is part of the seat belt buckle itself you will see what I can best describe as an accordian sleeve from it to the buckle the at the bottom of the assembly you will see what looks like a gas cylinder potruding from the side.
Remove the safety belt buckle and pretensioner . Remove the nut.
Remove the safety belt buckle and pretensioner.
http://i253.photobucket.com/albums/hh43/...
If the ckt is showing open then it is bad,that is what is setting the code.
One more thing look at my pic you have to pull the seat cover back and take off the nut then it comes out.If you have to remove the seat to do this then you will need to get the OCS(occupant classification sensor) in the passenger seat recalibrated.The dealer can do this thru the IDS.
Disreguard my last post your vehicle is not equipped with an OCS sensor in the passenger seat.So you don't have to have it calibrated.
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Turn the ignition key to run position. The AIRBAG light will come on for a few seconds and then start the flashing sequence. Count the number of flashes. The light will flash a 2 digit number (eg. 12, or 23, or...). So a code 23, for example, will flash twice pause for a couple of seconds and then flash three times... pause for a couple seconds and repeat that sequence all over again.
Ive learned to live with mine.i went to a dealer with mine and they couldnt do anything about it so ive had to learn to live with it
Hi
Code relates to low voltage detected in a capacitor inside the airbag module......
The restraints control module (RCM) monitors the resistance of the circuit to the passenger safety belt pretensioner. If the RCM detects a resistance that is out of the range on the passenger safety belt pretensioner circuits, it will store diagnostic trouble code (DTC) B1881 or B1886 in memory and flash, depending on the fault indicator, and lamp fault code (LFC) 47 depending on the fault (or higher priority code if one exists) on the air bag indicator.
Fault Conditions
The RCM monitors for the following fault conditions:
low resistance.
high resistance.
circuit open.
Possible Causes
A safety belt pretensioner fault can be caused by:
damaged wiring, terminals or connectors.
a faulted pretensioner.
a faulted RCM.
In plain English, the passenger seat belt buckle/pretensioner assembly is more than likely inoperative and needs to be replaced, unless the circuit to it is open. Hope this helps.
thanks for using fixya
you can also try to Turn off the ignition, open the connector, clean the pins and reassemble. Applying dielectric grease to the pins should make the repair last longer.
Good Luck
do not forget to rate the solution...
Turn off the ignition, open the connector, clean the pins and reassemble. Applying dielectric grease to the pins should make the repair last longer.
Turn off the ignition, open the connector, clean the pins and reassemble. Applying dielectric grease to the pins should make the repair last longer.
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When the airbags are deployed in an accident it burns out the airbag module, also known as the airbag diagnostic monitor, this must be replaced, the code u have indicates this is the problem. I am a Ford dealer tech and have seen this before.
when the monitor burns out it melts a small wire fusible link inside the monitor on the circuit board, so yes the code is for an open circuit.
Here is your answer, did u replace the R front explosive seat belt tensioner?
Code 47 is for the r/f seat belt buckle--the seat belt buckle has a explosive in it that pulls the buckle down to tighten up the seat belt when you get into an accident--take a look under the r/f seat and take a look at the wire to the r/f seat belt buckle ,,just in case they are broken or unpluged -the wires are YELLOW / BLACK and YELLOW / RED ---there is also a TSB out for this that the conector under the seat has high resistance and they wont you to clean the conector ,
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Ok. So how do I fix it?
Initially, following the wreck, the vehicle had several airbag codes. However, since the repairs, all of them but this one have cleared.
Again, the circuit is showing as open.
Per my original post..... my code is 47.
Could the problem be anything other than the buckle needing replaced? I don't mind spending the bucks to replace it, so long as I know that its the problem.
I have tested the circuit and it is reading at over 25ohm (open circuit).
What exactly is the right seat pretensioner? Is this the assembly that pulls out of the moulding or the assembly where the buckle itself is?
I have checked, cleaned and inspected all wires under both seats. The appear healthy and secure.
What sensor?
The wreck was fairly minor and the airbag did not deploy.
Your initial reply states "...the passenger seat belt buckle/pretensioner assembly is more than likely inoperative and needs to be replaced, unless the circuit to it is open..."
The circuit is showing open. I don't want to go on a random replacing part mission until I get lucky and replace the right unit.
Define tensioner. Are you talking about the assembly that the belt retracts to or the assembly of the buckle itself.
There are no wires running to the belt and retractor?
Chuck was right on track. Thanks for the diagram and the easy to follow explanation.
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