Question about 2001 Mercury Sable

17 Answers

Air Bag DTC B1881 Code 47

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?

Posted by Anonymous on

  • 11 more comments 
  • Anonymous Feb 11, 2009

    Ok. So how do I fix it?

  • Anonymous Feb 11, 2009

    Initially, following the wreck, the vehicle had several airbag codes. However, since the repairs, all of them but this one have cleared.

  • Anonymous Feb 11, 2009

    Again, the circuit is showing as open.

  • Anonymous Feb 11, 2009

    Per my original post..... my code is 47.

  • Anonymous Feb 11, 2009

    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).

  • Anonymous Feb 11, 2009

    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?

  • Anonymous Feb 11, 2009

    I have checked, cleaned and inspected all wires under both seats. The appear healthy and secure.

  • Anonymous Feb 11, 2009

    What sensor?

  • Anonymous Feb 11, 2009

    The wreck was fairly minor and the airbag did not deploy.

  • Anonymous Feb 11, 2009

    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.

  • Anonymous Feb 11, 2009

    Define tensioner. Are you talking about the assembly that the belt retracts to or the assembly of the buckle itself.

  • Anonymous Feb 11, 2009

    There are no wires running to the belt and retractor?

  • Anonymous Feb 11, 2009

    Chuck was right on track. Thanks for the diagram and the easy to follow explanation.

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17 Answers

Nate Stansfield

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  • Master
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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

Posted on Feb 11, 2009

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Jack Iaria

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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
Air Bag DTC B1881 Code 47 - 30a89bf.jpg

Posted on Feb 11, 2009

  • Jack Iaria
    Jack Iaria Feb 11, 2009

    If you believe the codes were not reset to factory standards then I would go to a auto part store to have them check it, diagnose it, and reset it if recommended!

    I use Advance Auto Parts since they will usually do this for free!

    jack

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Michael Masters

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  • Master
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The repairman forgot to reset the airbag sensor unit to factory specs.

Posted on Feb 11, 2009

  • Michael Masters
    Michael Masters Feb 11, 2009

    Its the airbag sensors. when the airbag was repacked by the repairman, they forgot to reset the sensor module.

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Randy Hough

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You will need to replace the complete retractor and belt.

Posted on Feb 11, 2009

  • Randy Hough
    Randy Hough Feb 11, 2009



    1. seat adjustment limit switch


    2. air bag deployment inhibitor circuit


    3. crash sensor


    4. seat belt buckle switch


    5. 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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Anonymous

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  • 229 Answers

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

Posted on Feb 11, 2009

  • Anonymous Feb 11, 2009

    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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Anonymous

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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.

Posted on Feb 11, 2009

Travis Humphries

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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!

Posted on Feb 11, 2009

  • Travis Humphries
    Travis Humphries Feb 11, 2009

    Yes, The Assembly that the Belt Retracts to down on the Floor on Each side of the Front Seats.

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Jeremy Reddick

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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

Posted on Feb 11, 2009

Anonymous

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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.

Posted on Feb 11, 2009

Anonymous

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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

Posted on Feb 11, 2009

Cary Crook

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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.

Posted on Feb 11, 2009

  • Cary Crook Feb 11, 2009

    Sorry one other thing the best way to fix this is replace both sides ( drivers side too) code or not, it is necessary and you should be cleared up. Thank You

  • Cary Crook Feb 11, 2009

    You will also need to replace the driverside pretensioner, it only explains this in the factory book. Thanks againHave a good day

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Chuck Martin

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  • Mercury Master
  • 783 Answers

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.

Posted on Feb 11, 2009

  • 5 more comments 
  • Chuck Martin
    Chuck Martin Feb 11, 2009

    Here are your part numbers for the part depending on color

    Black 2F1Z-5461202-AAC

    Parchment 2F1Z-5461202-AAA

    Graphite

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    Graphite 2F1A-5461202-AAB

    The list price is $98.02

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    That first part of the last number should have been 2F1Z and not A

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    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 .


    1. Remove the nut.


    1. Remove the safety belt buckle and pretensioner.

    http://i253.photobucket.com/albums/hh43/...

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    If the ckt is showing open then it is bad,that is what is setting the code.

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    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.

  • Chuck Martin
    Chuck Martin Feb 11, 2009

    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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Anonymous

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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.

Posted on Feb 11, 2009

Ronnie Houston

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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

Posted on Feb 11, 2009

Anonymous

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Hi
Code relates to low voltage detected in a capacitor inside the airbag module......

Posted on Feb 11, 2009

Anonymous

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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

Posted on Feb 11, 2009

  • 1 more comment 
  • Anonymous Feb 11, 2009

    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...

  • Anonymous Feb 11, 2009

    Turn off the ignition, open the connector, clean the pins and reassemble. Applying dielectric grease to the pins should make the repair last longer.



  • Anonymous Feb 11, 2009

    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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Marvin

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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.

Posted on Feb 11, 2009

  • Marvin
    Marvin Feb 11, 2009

    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.

  • Marvin
    Marvin Feb 11, 2009

    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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