FORScan Illiterate and have a question

[Yamapro]

Hey guys, I am not a computer savy person but I am fairly mechanical. I have never used a FORScan device. My situation is that I was deep into a trail last week and my speed sensors, abs sensors, all threw a fault code. This code prevents my lockers from engaging and put me in a bad spot stuck on the trail. I’m purchasing all four sensors to keep in the truck as spares but my dealership told me that I couldn’t just swap the sensors out without programming the truck to calibrate them, is this a true statement? If so, how difficult is it to purchase and learn a FORScan device so I could perform a trail repair?

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[Bronco cat]

What sensor was the issue. Very unlikely that all 4 died. Also I’m sure you will probably never have that happen again.

 

[Ducati1098]

None of this really makes sense. The ABS light was most likely on for a different reason. I highly doubt all 4 sensors threw a DTC and went bad all at the same time.

Also, wheel speed sensors are not programmed at all, so not sure what your dealer is talking about. They are 100% swap-able without any computer needed.

 

[mj63]

It sounds like there was an error in the reference speed calculation (notoriously difficult in 4wd when all four wheels are spinning and the vehicle is on a grade and/or side slope) to me and that set a plausibility fault against the wheelspeed sensor(s).

Front and rear wheelspeed sensors might be different from one another, but likely the same side to side, so I would tend to want to only carry one each of front and rear sensors at a time rather than all 4.

Also, yes this sort of error could set off a fault tree that disabled ABS, ESC, lockers, maybe even 4WD, etc.

 

[Yamapro]

What sensor was the issue. Very unlikely that all 4 died. Also I’m sure you will probably never have that happen again.

The tech told me that all 4 coded, which was strange. There was no damage to any sensor and they all check out fine now.

 

[Yamapro]

None of this really makes sense. The ABS light was most likely on for a different reason. I highly doubt all 4 sensors threw a DTC and went bad all at the same time.

Also, wheel speed sensors are not programmed at all, so not sure what your dealer is talking about. They are 100% swap-able without any computer needed.

I absolutely agree that it doesn’t make sense. The abs light came on, a parking brake warning came on, a parking assist disabled warning, and a couple more that aren’t coming to mind. I was able to find a half dozen people that had this exact experience in the forums but I was the only one off roading when it happened. I’m just looking for a way to repair the truck if it happens again as losing the lockers had me stuck on the trail, I was 8 hours deep into Golden Spike in Moab. I’ve already ordered all four sensors and will keep them on the truck in case. I was hoping that the dealership was full of it regarding having to program the sensor if I replaced one or all of them.

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