Seatbelt Warning Sensor is Too Sensitive

I probed around with my finger and found the exact spot where the
sensor switch is, near the middle of the seat. You can feel a
slight bump there; it's the spot that takes the least pressure to
turn on the light. I pulled out a Sharpie and *marked* it with a
black dot. It's sometimes possible to move objects away from there
to keep it off, but frankly even if it's blinking it doesn't bother
me that much [the beep is long since turned off].
.
_H*

 

I have a 14 lb dog and a 24 lb dog. The 14 lb dog can lay on the seat without setting off the alarm. The 24 lb dog always sets off the alarm. The threshold is between 14 and 24 lbs.

 

I like to fasten the seatbelt around my groceries so I don't end up with them all over the car floor if I have to slam on the breaks.

 

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My 2 dogs, 40 pounds will set it off. Any input on how to adjust the sensitivity would be appreciated.

 

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My soft briefcase (loaded with laptop and full legal sized folders) sets off the alarm, so I usually leave it on the rear driver's side floor or just bucklet the seat. I never weighed the bag, but one of my arms IS grossly overdeveloped compared to the other...

 

Look under the front passenger seat. Yeow, thats a lot of wiring to detect my wazoo. There are two measurement functions, the first sets off the seat belt buzzer, and the second (de)activates the passenger airbag system. As you can see, adjusting this fiddles with the passenger airbag system so the dealer may not be allowed to do this. The Toyota programming tool can calibrate this, but I did not see where it can grossly change this.

Front passenger classification/

AF05: Adult (36 to 54 kg (79.37 to 119.05 lb)) is seated

AM50: Adult (more than 54 kg (119.05 lb)) is seated

CHILD: Child (less than 36 kg (79.37 lb)) is seated

CRS: Child restraint system and front passenger side buckle switch ON, then 7 to 36 kg (15.43 to 79.37 lb) is set

OFF: Vacant[attachmentid=10239]

 

Since we unfailingly use our seatbelts, I'm going to disable the sensor.

 

<div class='quotetop'>QUOTE(lenjack @ Jul 29 2007, 02:50 PM) [snapback]487193[/snapback]</div>

Doing so will deactivate all the airbags and air curtains.

 

It may be safer to just disable the beep for the passenger seat. Turn the car on and make sure the odometer is showing the car's total mileage and you are not on the trip odometer. Once on the car's odometer, turn off the car. Get someone to sit in the passenger seat and turn on the car while holding the odometer button down. Have your pasenger buckle, then unbuckle the seatbelt while continuing to hold the odometer button down and you're done. It won't beep anymore when the dog or groceries are in the seat and the airbag will still work if there is a passenger there.

 

Be aware, however, once the car senses something in the seat, the passenger airbag is activated, warning beeps or not. So if you manage to trip the airbags, it will cost you a lot more than if you had just placed your cargo in the rear or in the hatch area.

But I do agree, the beeping is a little annoying.

 

I believe there may also be a sensor in the backrest. My teenager was in the back seat and leaned forward to talk with me while resting his arms on the unoccupied front seat backrest. Within 5 seconds his weight on the backrest activated the front passenger belt alarm.

 

<div class='quotetop'>QUOTE(Dr Ed @ Jul 29 2007, 07:42 PM) [snapback]487215[/snapback]</div>

Actually, there are only the four sensors at each corner of the seat. Each one is a weight sensor that adds up the total weight. It looks pretty involved and measures the weight of everything, including the weight of the seat itself and any rear passenger putting their feet on the seat, then removes the seat weight for sounding the buzzer and the light.

Sooner or later someone will figure out a hack to display the passengers weight on the MFD. Everything is there.

 

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I'm having problems understanding how a 12 year old girl sitting in the back seat can rest her arms in the front seat backrest. I would assume that any person travelling in the back of the car would use seatbelts just as you do in the front. Basically all the car's safety features assumes that all passengers are fastened at all times. All airbag systems rely on that to function correctly.

As for Norway, using seatbelts has been mandatory (where-ever you sit in the car) for several decades.

Just my thoughts....

Stein

 

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