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 Post subject: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Wed Feb 15, 2012 12:58 am 
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Joined: Fri May 27, 2011 1:21 pm
Posts: 16
Location: Saskatoon Canada
The pressure switch under the front passenger seat on an 05 Liberty CRD is triggered by weight. That seat pad is actually a bubble pack inside the seat foam. This pressure sensor sends line pressure down a 1/4 inch hose. The hose is attached to an electric trigger that sends variance of pressure data to the computer. There are 3 wires connected to the trigger.
1. green
2. green and orange
3. green and purple

How do you test this?
Air Bag light is always on. It goes out after turning on ignition then goes back on and stays on.
The Passenger air bag light is on.
The AB light on passenger side fluctuated after the visit at the dealer. It was working fine before the visit.

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 Post subject: Re: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Wed Feb 15, 2012 7:59 am 
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Joined: Sat Jan 20, 2007 4:26 pm
Posts: 1130
Location: Ottawa, Ontario
It may just need to be recalibrated. Mine started exhibiting this behaviour when it was a couple of months old. Dealer recalibrated and it's been fine ever since.

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 Post subject: Re: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Wed Feb 15, 2012 9:44 am 
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Joined: Fri May 27, 2011 1:21 pm
Posts: 16
Location: Saskatoon Canada
does anyone out there have a Right front passenger seat AIR BAG electrics? Sensors, switches, wiring, connectors...the lot?

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06 CRD Sport Patriot Blue $23,9k 37k(sold 10/09)
05 CRD Sport Patriot Blue $17k 43k(sold 03/10)
05 CRD Sport Atlantic Blue Sunroof $13k 84k(sold in 2011)
05 CRD Sport Radiant Silver $13,5k 77k(sold 10/11)
05 CRD LIMITED Radiant Silver $17k 70k(sold 12/11)
05 CRD LIMITED Black Green $16k 60k(sold 12/11)
05 CRD SPORT Black $15,9k 93k(in stock)


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 Post subject: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Wed Feb 15, 2012 10:59 am 
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Joined: Sun May 01, 2011 2:27 pm
Posts: 834
Location: Milford, IL
stoonCRD wrote:
does anyone out there have a Right front passenger seat AIR BAG electrics? Sensors, switches, wiring, connectors...the lot?


Check the classifieds. There is usually someone parting a wrecked one out. You will prolly have to take the whole seat but I would imagine still cheaper than going to the stealership

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 Post subject: Re: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Wed Feb 22, 2012 10:06 pm 
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Joined: Fri May 27, 2011 1:21 pm
Posts: 16
Location: Saskatoon Canada
I have found a front seat right with electrics at the Local Government Auto Salvage. I will replace the old seat and test to see if the AIR BAG lights go out. If not, I will have to resort to underworld procedure. I heard that the 04 Liberty may not talk to the on-board computer, being designated data circuit. The ECU don't forget will not connect to the dealership equipment. They're the one's that triggered this problem in the first place.

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06 CRD Sport Patriot Blue $23,9k 37k(sold 10/09)
05 CRD Sport Patriot Blue $17k 43k(sold 03/10)
05 CRD Sport Atlantic Blue Sunroof $13k 84k(sold in 2011)
05 CRD Sport Radiant Silver $13,5k 77k(sold 10/11)
05 CRD LIMITED Radiant Silver $17k 70k(sold 12/11)
05 CRD LIMITED Black Green $16k 60k(sold 12/11)
05 CRD SPORT Black $15,9k 93k(in stock)


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 Post subject: Re: How do you Test the Seat Occupancy sensor circuit?
PostPosted: Thu Feb 23, 2012 7:09 pm 
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The sending unit (trigger) might be vehicle specific, when I swapped my seats my light would come on all the time untill I swapped out the connector/plug/trigger with the one originally in my jeep. That being said, I too think it might need to be recalibrated, even a new one might not work for sure

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