Passenger Air Bag Light Not On

[Ranger SVO]

I have a question, I just noticed that the Passenger side air bag lights are not on.

The Passenger AirBag OFF and the Passenger AirBag ON lights are not.

The air bag diagnostic light on the dash is off, so I'm guessing that everything is working, but it would be nice if the lights would be on.

What should I check?

[nookandcrannycar]

I have a question, I just noticed that the Passenger side air bag lights are not on.

The Passenger AirBag OFF and the Passenger AirBag ON lights are not.

The air bag diagnostic light on the dash is off, so I'm guessing that everything is working, but it would be nice if the lights would be on.

What should I check?

If I'm understanding your explanation correctly, everything is working correctly. In the past, I had a similar feeling because of the labeling. After reading en explanation on some past thread as it came along in real time, I remember feeling that the labeling seemed counter intuitive. IIRC, lighting will change if you have enough weight on the front passenger seat that the system thinks there is a person sitting on the seat. CTScott is the expert on this, as he developed an aftermarket bypass module for the front passenger seat/airbag interaction.

[Ranger SVO]

Thanks for your response,

OK, I just found this and it describes my car exactly

http://www.yarisworld.com/forums/showthread.php?t=31124

How do I fix this??

[nookandcrannycar]

The way I'm understanding the thread you linked to, CTScott is describing a likely explanation, and both Debby and ersheff are agreeing and giving their experiences as examples. Are you experiencing ersheff's phenomenon, except without any weight being placed on the passenger seat at all (different from ersheff's bag and Debby's container of milk) ?

[Ranger SVO]

OK, when I sit in the passenger seat, the Airbag ON light illuminates and the seat belt light flashes.

When I get out of the seat, no lights are on. (both the AirBag OFF and AirBag ON lights are off)

When I put two One gallon jugs of water in the seat, the seat belt light flashes, both the AirBag OFF and AirBag ON lights are off

[shepd]

Here's the truth table for that indicator:

Condition / ON Indicator / OFF Indicator
Vacant / OFF / OFF
Adult is seated / ON / OFF
Child is seated / OFF / ON
Child restraint system is set / OFF / ON
Front passenger occupant classification system failure / OFF / ON

Yours appears to operate correctly. OFF / OFF means no human detected by the seat. ON / OFF means it found an adult in the seat. Airbag OFF actually means "Person detected in seat and airbag will not deploy", rather than "Airbag will not deploy". No lights at all mean "Nobody is occupying that seat, airbag will not deploy".

[Ranger SVO]

Here's the truth table for that indicator:

Condition / ON Indicator / OFF Indicator
Vacant / OFF / OFF
Adult is seated / ON / OFF
Child is seated / OFF / ON
Child restraint system is set / OFF / ON
Front passenger occupant classification system failure / OFF / ON

Yours appears to operate correctly. OFF / OFF means no human detected by the seat. ON / OFF means it found an adult in the seat. Airbag OFF actually means "Person detected in seat and airbag will not deploy", rather than "Airbag will not deploy". No lights at all mean "Nobody is occupying that seat, airbag will not deploy".

Thanks, I guess that makes sense. Thank you

[nookandcrannycar]

OK, when I sit in the passenger seat, the Airbag ON light illuminates and the seat belt light flashes.

When I get out of the seat, no lights are on. (both the AirBag OFF and AirBag ON lights are off)

When I put two One gallon jugs of water in the seat, the seat belt light flashes, both the AirBag OFF and AirBag ON lights are off

The sensor can detect a shift in weight (per CTScott), so I'd think you might be getting a different response than Debby did because the jug likely isn't in the exact same place in both instances.

[nookandcrannycar]

Here's the truth table for that indicator:

Condition / ON Indicator / OFF Indicator
Vacant / OFF / OFF
Adult is seated / ON / OFF
Child is seated / OFF / ON
Child restraint system is set / OFF / ON
Front passenger occupant classification system failure / OFF / ON

Yours appears to operate correctly. OFF / OFF means no human detected by the seat. ON / OFF means it found an adult in the seat. Airbag OFF actually means "Person detected in seat and airbag will not deploy", rather than "Airbag will not deploy". No lights at all mean "Nobody is occupying that seat, airbag will not deploy".

:thumbsup::thumbsup:

[CTScott]

The sensor can detect a shift in weight (per CTScott), so I'd think you might be getting a different response than Debby did because the jug likely isn't in the exact same place in both instances.

That is possible. Also, the calibration of the module to the sensors can cause two cars to behave differently.