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11-04-2009, 09:19 PM | #1 |
Drives: 2009 Toyota Yaris Join Date: May 2009
Location: Baton Rouge, Louisiana, U.S.A.
Posts: 56
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Passenger Airbag Question
Today I was driving my wife home from work in my 2009 Yaris hatchback and something happened with the passenger airbag. The light indicated the airbag was on then all of a sudden the light indicated the passenger airbag was off. She unbuckled and rebuckled the seat belt and the airbag was switched back on again.
Can anyone explain what caused the passenger airbag to turn off? Any ideas? RedStickHam |
11-04-2009, 09:48 PM | #2 |
Drives: 2008 yaris, stripped, red Join Date: Jan 2009
Location: SE Texas
Posts: 977
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maybe a loose switch in the buckle, or on the weight sensor...
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11-04-2009, 10:20 PM | #3 | |
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Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Quote:
The passenger occupancy ECU polls the sensors and the passenger seat belt switch every 100ms. If any of the 4 weight sensors or the buckle switch don't respond, it shuts down and flashes the passenger airbag off light. It won't reset from that state until the ignition is cycled. For it to have done what you saw, it had to have weighed her as being under the limit for arming the airbag. If she is fairly light and was shifting in the seat or you hit a pretty good bump I could see the system disarming and then rearming the airbag. Did the passenger seatbelt light come on as well? |
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11-05-2009, 09:19 AM | #4 | |
Drives: 2009 Toyota Yaris Join Date: May 2009
Location: Baton Rouge, Louisiana, U.S.A.
Posts: 56
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Quote:
The seatbelt light only came on when she unbuckled. She did shift around in her seat a little though. One other thing to note was I had stopped the car to empty our mailbox before she did the seatbelt thing, so perhaps it reset with the ignition being turned off and back on. Thanks. RedStickHam |
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08-08-2010, 09:56 PM | #5 |
Drives: 2008 Yaris LB + Nissan 300zx Join Date: May 2009
Location: Sycamore
Posts: 16
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I kind of have a similar problem. I got in my Yaris one day and I noticed the seat belt light was blinking but no sound and the light for passenger air bag off was lite up. There was no passenger in the seat. I have tried sitting in the seat and fastening the buckle to see if the light goes off but no luck. Any ideas or solutions would be appreciated. It's getting annoying.
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08-08-2010, 10:43 PM | #6 | |
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Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
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06-23-2013, 03:20 PM | #7 |
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Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
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Is the new one a Yaris one, or is it from some other Toyota (also is it OEM or an aftermarket one)?
If everything checks out OK through the clock spring, you should also check for continuity between the 4 airbag wires at the steering column to their other end at the SRS ECU (you have to pull the center console to get to it, just under the bottom of the AC controls). The four wires (yellow/black, yellow, yellow-red, and yellow-green) go to the 5th, 6th, 7th and 8th positions from the top left of the SRS ECU connector. Was the car in a crash, or did the clockspring just fail on you?
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06-23-2013, 03:26 PM | #8 |
The clockspring is aftermarket. I will open the console up to check into the continuity test on the ECU.
The car may have been in a crash, I recently bought it, the person doesn't know the details of the crash. If all the equipment was replaced, what about it being in a crash would cause this error? |
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06-23-2013, 04:39 PM | #9 | |
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Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
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Quote:
The error 51 is not related, but once you get it resolved and get the DTC cleared, if the light stays on, that is why. I actually have the equipment to do the crash data clearing and have figured out the portions of the EEPROM that need to be cleared to do so.
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