4x4 not working

So I was being jackass trying to revers into a snow bank I heard a snap, now the 4 wheel drive is stuck flashing and it reads code p0705 what does that entail.

 

How loud was this "snap"?

Cuz P0705 means an issue with the trans range sensor... which is right next to your front driveshaft. A SWAG would be a front driveshaft u-joint let go, and the driveshaft just broke the range switch. (You, uh, may wish to not shut the truck off if you're not at home, I have a funny feeling it might not restart...)

 

The snap wasn’t loud like if I was hitting a curb but it’s just stuck in 2wd, I was able to drive home, I also looked under and the drive shaft looks good and the transfer case looks good as well.

 

More accurately, how expensive did the 'snap' sound?

Agree with @fb40dash5 assessment. A good crawl under the truck is step one.

 

When you are in gear. Does the indicator on the dash show the correct position?

P, R, N , D, 4, 3 ,2 L

 

Yes and they all work

 

Anything that looks like a piece of a PRNDL switch hanging by some wires? Not 100% sure of where it sits on your truck and can't open up All Data ATM, but it could be that you actually broke the switch...

 

You've got a 705 code, the display is correct and the truck shifts... WTF?

 

Yes I’m just as confused

 

Who knows, maybe you got the cable, or wiring harness in a bind from the snow.

Disconnect the battery for 3 mins.
This will clear the code. See if it comes back on.

Depending on the circumstances, you can’t switch to 4WD if you are in the wrong gear.

I vote, clear the code and see what happens.

 

Ok I’ll give that a try but I tried switch in different gears and as I was driving the 4x4 light would not stop flashing

 

Agree - clear the codes and see what happens, but this sounds like the makings of a good diagnostic case study.

 

It’s worth a shot.
You might get lucky.

If not, we can go from there and try to figure out the best means to diagnose this.

 

Just I’d the reset still flashing and there is a new code 0 dtc

 

A code Zero?
Or no codes?

We can likely get to the cause of the 4x4 not working, but I never seen a code “0”.

 

Is the scanner saying “0 new DTCs”?
And is the CEL still on?

 

No the cel was never on it was the 4 wheel drive light flashing even when driving and not engaged and even when engaged, also four low is not showing on the dash when I try to engage it.

 

Looks like we got rid of the p0705.
We can now skip to the 4WD problem.



If you are willing to remove 1 bolt from the glovebox and take a few readings at the 4WD ECU.
https://www.tacomaworld.com/threads/4wd-system-operation-help-thread.742420/

 

Have you rolled around under the truck and looked at the transfer case actuator, etc?