MR2 Roadster Owners Club

The Workshop => Audio / Security / Electrical => Topic started by: Anonymous on July 26, 2005, 12:33

Title: Passenger airbag disablement??
Post by: Anonymous on July 26, 2005, 12:33
Is there a way that the passenger airbag can be disabled temporarily, to allow for a kiddies booster seat to be put on the passenger seat??  If so how would I do it and is it easy to do?

Thanks in advance!

Chris  s:) :) s:)
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Post by: kanujunkie on July 26, 2005, 12:40
the search button useing airbag and disable revealed this

http://www.mr2roc.org/phpBB2/viewtopic.php?t=340&highlight=airbag+disable

no conclusive answer only speculation, only guaranteed way would be to cut the wires and resplice them together at a later point
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Post by: Slacey on July 26, 2005, 12:51
The easiest (and guaranteed) way to disable it is to disconnect the passenger side bag from the airbag control box which is near the radio. Take out the glovebox and you will be able to see it. Pull the connector, job done.
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Post by: roger on July 26, 2005, 13:32
Quote from: "Slacey"The easiest (and guaranteed) way to disable it is to disconnect the passenger side bag from the airbag control box which is near the radio. Take out the glovebox and you will be able to see it. Pull the connector, job done.

And then you connect to a switch in the glove box, do a write up and tell us all about it   s:wink: :wink: s:wink:
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Post by: Anonymous on December 14, 2007, 15:57
Quote from: "Slacey"The easiest (and guaranteed) way to disable it is to disconnect the passenger side bag from the airbag control box which is near the radio. Take out the glovebox and you will be able to see it. Pull the connector, job done.

Bringing up an old thread...

Is the connector nearer the airbag end or the control box end?
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Post by: kanujunkie on December 16, 2007, 04:02
one at each end
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Post by: Anonymous on December 16, 2007, 14:04
Quote from: "kanujunkie"one at each end

Thanks!
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Post by: Anonymous on December 18, 2007, 03:37
Quote from: "kanujunkie"one at each end

I went down the passenger footwell and found the silver airbag control unit.

There are four yellow connectors...

(http://www.uploadgeek.com/uploads456/0/AirBag%20Control%20Unit.jpg)

From the left to right (on a RHD car),

1. Small connector (2 wires)
2. Large connector many wires
3. Small connector (same as 1)
4. Medium connector few wires (some distance to the right of 3)

Then I notice that wires from 1 and 3 go into a common loom...

Ermmm which connector represents what?

Connector 1 to fire left side airbag?
Connector 1 to detect person in left seat?
Connector 2 for ... ???

Anyone knows?
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Post by: roger on December 18, 2007, 13:52
Based on the repair manual it looks as though connectors 1 & 3 go to seat belt pre-tensioners, and 2 covers the air bags.

A wiring diagram (I think I have one at home, but anybody else?) will show which is the passenger air bag. BTW US cars have a switch for the passenger bag, so in theory at least, you can put one in line and it will give you the option you require.
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Post by: kanujunkie on December 19, 2007, 07:41
airbags come off block B lines according to the wiring diagrams, problem is the manual some of us have is american which affects things like the obvious driver/passenger positions, the second problem on top of that is that some electrical items are not swapped around, so with that in mind the manual i have shows the pax connections on positions 10 and 11 and the drivers on 13 and 14
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Post by: Anonymous on December 19, 2007, 09:59
Quote from: "kanujunkie"airbags come off block B lines according to the wiring diagrams, problem is the manual some of us have is american which affects things like the obvious driver/passenger positions, the second problem on top of that is that some electrical items are not swapped around, so with that in mind the manual i have shows the pax connections on positions 10 and 11 and the drivers on 13 and 14

Cool!

So block B I presume refers to the number 2 connector I've labelled in the pic?

And positions 10, 11, 13 and 14... how do I count these? Are they all going to be disconnected if I unplug the entire number "2" plug?

Thanks! U guys are great!
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Post by: aaronjb on December 19, 2007, 10:29
First of all, a warning (from the shop manual):
QuoteWork must be started after 90 seconds from when the ignition switch is turned to the "LOCK" position and the
negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)

Now - if you unplug the entire plug 2 you'll lose all airbags.

Secondly - the disable switch fitted to US models isn't quite as simple as a switch in the wires (see below) - when switched 'off' it's actually actively pulling the firing line low (to ground) and disconnecting the negative trigger.

(http://zion.mind-design.co.uk/roadster/airbag_sw.gif)

I can't find the page with the connector pinouts on, but the above diagram shows the wire colours - the wires at the airbag sensor end should be the same colour as a Euro car, as far as I know.

It also looks rather like you might be able to retro fit the US disable switch - the diagrams make it look like all of the logic is contained in the switch, with the switch effectively fitted inline in the passenger airbag lead.
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Post by: Anonymous on December 20, 2007, 22:27
Whoa! This is really detailed info! So I guess that if I do not get the US switch, I will be better of pulling the plug off the passenger airbag end rather than the joint connector (number 2) at the airbag ECU end?