What keeps the air bags from deploying when off-road, are they disabled when in 4Lo?
- posted
18 years ago
What keeps the air bags from deploying when off-road, are they disabled when in 4Lo?
They don't deploy at speeds under about 20 mph.
Well, 8-14 mph is more thn 5.
I suppose the question now is..... are jeepers generally pulling the air bag fuses when off-road?
What about the ABS system, is that disabled in part time 4WD?
I've never had cause to do so. My pass airbag has a switch, and I've never had a frontal collision off-road. On-road either, for that matter.
I believe ABS also does not operate under a certain speed, but I am not sure what that speed is, IIRC it's about 10mph. Checked my FSM, no mention of what the speed is. There is mention of a "G-Switch" which "provides addition deceleration reference in 4wd" but it doesn't go into detail. No mention of ABS being disabled in 4wd.
My ABS has never been a problem off-road, either; I don't ever remember it kicking in when it would have been dangerous. For that matter, I don't remember it kicking in ever on the trail, but probably has kicked in occasionally, say if you're stuck, one wheel is spinning and you put on the brakes, that would cause the ABS to pump. But it's pretty transparent.
The Deer and Sunfire referenced a change in velocity (i.e. deceleration), not vehicle speed. Under 3 mph and a deer won't do that kind of damage to the car.
An interesting statistic
I wear belts religiously, so that's a non-issue.
"ABS does not work with part time 4WD systems."
Not so. I had a 1993 Jeep Grand Cherokee with ABS and on rain-covered ice in a parking lot one winter the ABS most definitely was operating in part-time
4wd. Maybe that's changed since, but IIRC my 2000 TJ FSM doesn't mention ABS being disabled in part-time 4wd.
My Toyota Tacoma TRD has ABS and part time 4WD.
The truck also has a locker and LSD, which is another combo many (outside of Jeepers) seem to think can't coexist on the same vehicle.
The only fact I can see is you're reading it wrong.
"Lastly, if equipped with Anti-Lock Brakes, when shifted into low-range, the ABS is set to a different calibration, aiding off-road stopping."
Care to cite a source that says it's completely disabled? Facts, please, not your personal interpretation.
Perhaps, but "some" is not "always." The ABS will still modulate if engaged. Kind of like pumping the brakes slower.
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