ABS Module Replacement or?

[Memcdowe]

Ok need some advice.
2020 JLUR 36,700 miles

Does anyone know of a write up or video on replacing the ABS Module on the JL’s?

Few weeks ago ABS/Traction Control/Service 4wd light etc came on. Started intermittent. Now stays on. Cans at dealership (at 35,400 or so miles) indicated front driver wheel speed sensor among other codes. I was leaving town and wanted to see if it could be cleared so I could use cruise control. It (AND 4WD!) won’t work with the ABS codes.

Now I’m being told that it’s over 36000 miles and it won’t be covered. I’d have to leave it with them for a week just to diagnose. And they’re just a mess over there.

So I want to just repair myself, a problem that occurred and was documented under warranty.

I found some wheel speed sensors for front (back ordered almost everywhere - shocker) but wonder if I should replace the abs module as well while I’m at it sense it could be the culprit.

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[mwilk012]

No? That makes no sense at all.

 

[garykk]

https://www.jlwranglerforums.com/fo...or-lights-abs-traction-and-service-4wd.21811/

 

[Memcdowe]

https://www.jlwranglerforums.com/fo...or-lights-abs-traction-and-service-4wd.21811/

Read and participated on that one before starting this one.

Looks like I’ll be taking it into the dealership. I’ve never once had a positive outcome taking my Jeep to our local dealership for warranty items and had a positive outcome. Always multiple trips back. And never don’t on time. Leave cars unlocked in service parking lot, they’ve parked several Jeeps in service lot with tops down right before a rain, left a rag INSIDE THE REAR DIFF during a regear that was already the second attempt as the first regear attempt by dealership lasted one week or so.
Don’t think it was every resolved. Guy even took video of opening the diff to see what was wrong. He’d taken it back to dealership before opening it himself because it didn’t feel or sound right. They said they checked it. It sounded same. He filmed opening it and a freakin grease rag was inside the diff. Kind of in the very back where I guess the fears had pushed it. Unbelievable, y’all. They didn’t even deny it. Or apologize smh. But they ended up getting him a new axle or something like that. The Jeep was an older 3.8 so no warranty, but the regear was warrantied.

And I have story after story myself. They aren’t as funny ha. So you see why I’m so hesitant to leave it there. The other dealerships are about 1.5 hours away.

 

[mwilk012]

Then take it to an independent shop.

why would you assume a bad module when there is a single sensor indicating a fault?

 

[Memcdowe]

Then take it to an independent shop.

why would you assume a bad module when there is a single sensor indicating a fault?

Two ASC

 

[Memcdowe]

Several reasons. That, even though your response wasn’t helpful or intended to be, I’ll say anyway.

Two local shop owners (both ASE Certified) looked at the various codes and determined it’s the front left sensor, frayed wiring or ABS module. Sensors are all on backorder. I’ve verified the harness and connections are all good. ABS module is the only other item indicated. Also, I’ve found two star reports regarding the specific codes mine is throwing. All indicate sensor, wiring, or abs module.

Wiring is good. Verified by eyeball and meter. Cannot get the front sensors. Everyone says you can then link the rear sensors. Everyone always thinks they have the answers but then just ask stupid questions.

If anyone has any relevant experience with this please let me know. If you just want to ask condescending questions as you troll through posts, buzz off.

 

[mwilk012]

Several reasons. That, even though your response wasn’t helpful or intended to be, I’ll say anyway.

Two local shop owners (both ASE Certified) looked at the various codes and determined it’s the front left sensor, frayed wiring or ABS module. Sensors are all on backorder. I’ve verified the harness and connections are all good. ABS module is the only other item indicated. Also, I’ve found two star reports regarding the specific codes mine is throwing. All indicate sensor, wiring, or abs module.

Wiring is good. Verified by eyeball and meter. Cannot get the front sensors. Everyone says you can then link the rear sensors. Everyone always thinks they have the answers but then just ask stupid questions.

If anyone has any relevant experience with this please let me know. If you just want to ask condescending questions as you troll through posts, buzz off.

Did either of these people even bother to test these components? It sounds like they read the codes and pulled up identifix without ever looking at your Jeep.

Switch the front left and front right wheel speed sensors. Clean the connections, blow the rust outof the wheel bearings where the relict or wheel is.

 

[Memcdowe]

Did either of these people even bother to test these components? It sounds like they read the codes and pulled up identifix without ever looking at your Jeep.

Switch the front left and front right wheel speed sensors. Clean the connections, blow the rust outof the wheel bearings where the relict or wheel is.

You make a lot of assumptions. No need for all that, man. Thx for the advice.

 

[Dave928]

so you have work order from when the dealership looked at it @ 35,400 miles? if so it should be covered as that's proof [something] crapped out before the warranty ran out.

 

[Memcdowe]

so you have work order from when the dealership looked at it @ 35,400 miles? if so it should be covered as that's proof [something] crapped out before the warranty ran out.

They just scanned it. Didn’t create a work order. I sent a text to the service director. He told me to pull in and have it scanned to pull the codes. So I did. They didn’t create a paper trail, but scanning it recorded my vin and logged it according to several service advisor friends.

I’m contacting Jeep customer care tomorrow and deciding which dealership to take it to. To get in line for a part iffor no other reason.

12 calls to dealerships known to have large parts departments and zero front wheel speed sensors in stock. Backordered with no eta.

 

[Dave928]

still, if there's a record in their system that they found a failure before 36k, it should be warranty.

i don't understand why jeep is so hard about this. when i was a VW tech, all i had to do was remind my boss that we found a fault on a customers car before the warranty ran out, now they're out. "ok. covered."

we had a guy buy a new Passat W8 and literally every accessory VW made for it. wheels, body kit, etc. came to us for every service, even when something damaged was his fault. replaced all his wheels when chains damaged them. LOTS of money. his HID headlights went out about 500 miles out of warranty, about a $2k repair. reminded the boss how much he's spent with us. "ok. covered." (goodwill repair).

 

[Whaler27]

Given the age of your Jeep and what‘s been described above, I suspect you have correctly diagnosed the problem, but your Jeep’s diagnostic system is extremely sensitive to battery charge level, and all kinds of bizarre codes can get set if your batteries are out of whack.

I replaced the problematic OEM batteries in my 2019 JLUR with a Genesis dual battery system, but I stupidly allowed my batteries to drop to below critical levels. (The Jeep isn’t driven much and I forgot to put it on a battery tender.) When I tried to start the Jeep the dash lit up like a Christmas tree and it threw a bunch of codes. I charged the batteries and then used my Tazer to clear all the codes, but the faulty ABS/wheel speed sensor codes would immediately reset, along with the warning that the cruise control and traction control were inoperative.

As it turns out, there was nothing wrong with my wheel speed sensors. The low battery power caused the Jeep to lose it’s mind in a way that couldn’t be cleared with the Tazer. The dealership reflashed my Jeep and it’s been fine for a couple months.

I’ve never had a vehicle that would completely lose its mind if the battery dropped below critical levels bit, based on what I’ve read here, that’s part of owning a modern Jeep.

 

[Memcdowe]

Found problem. Driver front speed sensor harness plug had one wire that had broken due to an upward pull on the harness. The wire ends were contacting each other ever so slightly. didn’t find it until a started undoing the plug.
Contact with steering shaft most likely. Depinned and resoldered. Issue resolved.
Original solder on that plug was minimal at best. Check before replacing sensors!

 

[mwilk012]

Found problem. Driver front speed sensor harness plug had one wire that had broken due to an upward pull on the harness. The wire ends were contacting each other ever so slightly. didn’t find it until a started undoing the plug.
Contact with steering shaft most likely. Depinned and resoldered. Issue resolved.
Original solder on that plug was minimal at best. Check before replacing sensors!

Good find. How much of a lift is on your Jeep? May need to adjust the positioning of the wiring to compensate.

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