4 wheel drive unavailable

[shurdba]

Looking for some suggestions on next step to chase down a 4 wheel drive problem:

4 wheel drive becomes unavailable when either front or rear wheels start rotating at different speeds.

While climbing an obstacle, first front and rear lockers went out, then error “4 wheel drive temporarily unavailable”. Was in 4 low manual first gear (automatic). Later error message “4 wheel drive unavailable”.

Did the battery reboot and disconnected the refrigerator and all other accessories, but done for the day. Was at the UBB event in Utah.

Dealer in St George Utah took a look at it:

Tested the 4 X 4 system. Performed a scan test and had lost communication DTCs. Cleared the DTCs and performed an AWD and IPC module self test and they both passed. No visual damage. They did find TSB-TSB-23-2182 which is bad battery state of charge. They did a battery check and determined it was good. This seems to be an issue with some 21-22 Broncos.

Works fine on a dirt road, but in loose sand or a climb, it goes sideways.

Recent modifications include adding a raptor steering rack and ProCal. There were issues getting it installed. An electronic sway bar disconnect was added a couple years ago. Two inch lift on stock 35s. 2022 Wildtrak.

Ironically, two other Broncos had the same issue that day but were corrected by the battery reboot. Any suggestions would be much appreciated.

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[Ducati1098]

Maybe this?

 

[RoseLane4]

This is why I criticize the 4A (lack of) “advanced” T-Box and Fords pursuit of these silly GOAT modes.

I could see the value for an AWD vehicle, like the Sport but I feel these electronic software enabled systems blow

kudos to you guys that like ‘em.

 

[shurdba]

Maybe this?

That would explain why it works after a short drive and then poops out again. That's new to me. It says there is an software update. Thank you, I'll look into it.

 

[shurdba]

I forgot to add that the throttle got all wacky. Step on the pedal or release the pedal and very slow response up or down.

 

[Hummell]

I had this happen to me DEEP inside Uwharrie on Dutch John Trail alone during the week. Horrible spot for it to happen. Every kind of error code you can imagine. I finally got out to a service road and once I got it up to around 25mph, everything cleared and was all good. I'm gonna have to check out that service bulletin above that @Ducati1098 posted (thank you, Ducati). That sounds like what was going on...hasn't happened since, but I definitely don't want to deal with that again.

 

[shurdba]

Would installing ProCal have anything to do with this anomaly? I mean, why now. I have been wheeling about twice a month for the past 3 years and all of a sudden it happens when I'm between tumble down drop off and too steep to climb boulder garden. Any ideas?

 

[Hummell]

I'm at the dealership right now getting the ABS module update. We'll see what happens.

 

[shurdba]

I'm at the dealership right now getting the ABS module update. We'll see what happens.

Please, Please get back to us. Mine is scheduled for next week.

 

[Hummell]

Please, Please get back to us. Mine is scheduled for next week.

What came out. I’ll be in Uwharrie in 2 weeks and will try to recreate it. Fwiw I don’t have the Procal Tune.

 

[Brian_B]

Would installing ProCal have anything to do with this anomaly? I mean, why now. I have been wheeling about twice a month for the past 3 years and all of a sudden it happens when I'm between tumble down drop off and too steep to climb boulder garden. Any ideas?

Nope. At least this particular issue is all about wheel slippage and how the computer reacts to it. ProCal doesn't affect any of that.

 

[Raybj]

Im looking into the AWD module and ground. I have updated the module the latest updates. When first getting into it the module was dormant!! Did the update and we'll see. I cant run out and test it yet no place to go!!

 

[Hummell]

Please, Please get back to us. Mine is scheduled for next week.

Update! I was out on Daniel and Dicky Bell trails in Uwharrie last week. I tried my hardest to recreate this and could not following the ABS module update. I'm not positive if it did anything or just didn't happen this time out, but it didn't happen even though I tried.

 

[shurdba]

Im looking into the AWD module and ground. I have updated the module the latest updates. When first getting into it the module was dormant!! Did the update and we'll see. I cant run out and test it yet no place to go!!

Let us know what you find out. Should be getting mine back from the dealer today. I'll try to find someplace close by to get one wheel off the ground and see if it throws the error.

 

[shurdba]

Update! I was out on Daniel and Dicky Bell trails in Uwharrie last week. I tried my hardest to recreate this and could not following the ABS module update. I'm not positive if it did anything or just didn't happen this time out, but it didn't happen even though I tried.

That's good news!

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