Service 4WD Light

Dan V 25 · January 22, 2020

Well I'm still waiting on the transfer case module to come in. That's what they said it was.

19Sierra · January 22, 2020

37 minutes ago, Dan V 25 said:

Well I'm still waiting on the transfer case module to come in. That's what they said it was.

Was your 4wd light intermittent as well? Did it clear itself after driving a few miles?

Edited January 22, 2020 by 19Sierra

Dan V 25 · January 22, 2020

Was your 4wd light intermittent as well? Did it clear itself after driving a few miles?

Yes. Mine sometimes would clear after a day or two. I really dont think that's the problem but heres to hoping it does fix it.

19Sierra · January 22, 2020

So the light went out on my way there but the code was still saved in the truck for that ignition cycle. Here's what they did this time. Hopefully this fixes it, but only time will tell.

Dan V 25 · January 22, 2020

6 hours ago, 19Sierra said:

So the light went out on my way there but the code was still saved in the truck for that ignition cycle. Here's what they did this time. Hopefully this fixes it, but only time will tell.

Yeah they updated the software for me the first time. Still didnt fix it. Still waiting for the part to come in

Pinnacle · January 22, 2020

On 1/21/2020 at 4:07 PM, davester said:

...except of course, for the frame of those Tundras... How many of them has yota recalled?

ya, ofcourse there is this guy that mentions something that happened on 13 plus year old trucks that Toyota addressed and fixed, you should look at the 2014 Gm truck frames. How about you stick to the present and lets not get into recalls since GM and Ford lead the way 10 fold.

Colossus · January 22, 2020

Actually Ram leads by far when it comes to recalls...

Dan V 25 · January 24, 2020

Went down to my dealer to see if they heard anything on the TCCM they ordered....GM is currently out. So who knows when I'll be getting my part.

Pinnacle · January 25, 2020

On 1/22/2020 at 5:07 PM, Colossus said:

Actually Ram leads by far when it comes to recalls...

And by far you are wrong, its Ford.

Colossus · January 25, 2020

Not according to the NHTSA.

19Sierra · January 26, 2020

On 1/24/2020 at 4:56 PM, Dan V 25 said:

Went down to my dealer to see if they heard anything on the TCCM they ordered....GM is currently out. So who knows when I'll be getting my part.

That sucks, mines been good so far, fingers are still crossed though. Lol there was another guy at the dealer Wednesday that was having the same issue as us. So clearly it's not a couple isolated incidents.

Edited January 26, 2020 by 19Sierra

Pinnacle · January 26, 2020

17 hours ago, Colossus said:

Not according to the NHTSA.

And what are the numbers by make?

Mariah Forar · January 27, 2020

1/27/19 @ 5:35 am my truck threw this code.. "Service 4WD" after attempting to switch it from AUTO to 2HI. I was not moving, the truck was in neutral and I had just driven it the day before about 100 miles, no issues and smooth sailing. I continued to drive despite the code and the truck handled fine. Also, of course once I put it in park, the Ebrake automatically engaged.

After reading through the multiple posts on this forum, I'm less than pleased to now be a part of this. I will be making an appointment with the dealer and if they come up with any effective repairs, I will hop on here and give an update.

Edited January 27, 2020 by Mariah Forar

19Sierra · January 28, 2020

Mine just came back on again tonight. Swung by the dealer and they scanned it and got the same code as the last 2 times. Said they where going to have the service advisor that I have been dealing with throughout this issue call me tomorrow and figure out what she wants to do next.

Mariah Forar · January 28, 2020

The dealership told me that the transfer case was "confused" and didn't know what driving mode it was in so it ended up getting stuck in 4HI causing the rear diff to slip and the truck wouldn't drive forward at all. I was told they had to re-program the transfer case control module so basically meaning they reset it?? and I was told it's good to go... Well we'll see. If it comes down to a computer getting confused then like any phone or laptop, which happens quite often, we reset those when they get "confused" but with my truck, I had to get it towed yesterday because the computer was confused??? Ridiculous. I'll be waiting impatiently for a recall notice.