6 Faults and AWD Module

[Cdubya]

UPDATE: Got my car back today and they replaced the AWD Module, which was the first time for this part. So it drives really well now!

Was your explorer made 9-19 through 12-2021...those had the AWD module grounding problem. It amazes me how Ford doesn't issue a recall on this.

 

[hbalek]

Was your explorer made 9-19 through 12-2021...those had the AWD module grounding problem. It amazes me how Ford doesn't issue a recall on this.

Yes my 2020 was built in 11/19.

 

[wifeys-ST]

Do you know what codes you have?

---Break---

I'm new to this particular forum seeing several similar threads on here, and it seems there are a couple of different issues giving similar warning messages in the cluster. In some instances the actual trouble codes may or may not be listed, and I think that's the key to figuring this stuff out. I also realize not everyone has a means of pulling the codes.

For a 2020 Platinum my mother owns I'm trying to diagnose the following codes: U102F, U0102, U0146, U011D, U0100, and U0418 pulled using FORScan.

These codes are accompanied by the following messages in the cluster "4WD Fault Service Required," "Hill Start Assist Not Available," "Service Advance Trac," "Pre-Collision Assist Not Available," and "Reverse Brake Assist Not Available See Manual" (when shifted into reverse).

I didn't see that OP had posted his codes either but there is a different TSB 23-2061 (attached) out there that isn't getting a lot of press that I can see. This revision was issued late Feb 2023 and it calls for splicing in a body ground wire to the ground circuit (Pin 46) at the TCCM connector under the driver's seat. It mentions all of my codes and the cluster messages so I feel like it might be a better alternative than replacing TCCMs. It also looks like there's potential for the TCCM to lose it's case/body ground through the three mounting studs/nuts. See WaferTech's Post #84 in this thread: https://www.explorerst.org/threads/4wd-fault-service-required.3964/page-5. I can't find a copy of the superseded TSB 21-2386 to know what procedure/repair parts changed, when it originally came out, etc. I'll go out on a limb here, but what if some of these TCCMs that have been replaced were perfectly fine and just had a poor case/body ground. Then once a new module was bolted down (and programmed accordingly of course) the case/body ground was restored? Something to thing about especially since the revised TSB adds a new body ground directly to the wiring harness.

I’ve been looking all over, this is very likely my issue. I’m going to look into doing this in the next week

 

[wifeys-ST]

Do you know what codes you have?

---Break---

I'm new to this particular forum seeing several similar threads on here, and it seems there are a couple of different issues giving similar warning messages in the cluster. In some instances the actual trouble codes may or may not be listed, and I think that's the key to figuring this stuff out. I also realize not everyone has a means of pulling the codes.

For a 2020 Platinum my mother owns I'm trying to diagnose the following codes: U102F, U0102, U0146, U011D, U0100, and U0418 pulled using FORScan.

These codes are accompanied by the following messages in the cluster "4WD Fault Service Required," "Hill Start Assist Not Available," "Service Advance Trac," "Pre-Collision Assist Not Available," and "Reverse Brake Assist Not Available See Manual" (when shifted into reverse).

I didn't see that OP had posted his codes either but there is a different TSB 23-2061 (attached) out there that isn't getting a lot of press that I can see. This revision was issued late Feb 2023 and it calls for splicing in a body ground wire to the ground circuit (Pin 46) at the TCCM connector under the driver's seat. It mentions all of my codes and the cluster messages so I feel like it might be a better alternative than replacing TCCMs. It also looks like there's potential for the TCCM to lose it's case/body ground through the three mounting studs/nuts. See WaferTech's Post #84 in this thread: https://www.explorerst.org/threads/4wd-fault-service-required.3964/page-5. I can't find a copy of the superseded TSB 21-2386 to know what procedure/repair parts changed, when it originally came out, etc. I'll go out on a limb here, but what if some of these TCCMs that have been replaced were perfectly fine and just had a poor case/body ground. Then once a new module was bolted down (and programmed accordingly of course) the case/body ground was restored? Something to thing about especially since the revised TSB adds a new body ground directly to the wiring harness.

BTW i fully verified this was my issue. I was detecting 50Ohms between the AWD module case and ground. I was reading 2.3 volts from the ground wire at the FADA connector to the engine block. I wiggled the connector under the driver seat going to the AWD module and all of the grounds cleared up and all of my DTCs and dash lights went away. I'm going to perform the TSB so it doesn't come back but man i'm glad you shared this.

BTW this TSB does not exist anywhere anymore. It has been removed from Ford's database. I called ford and asked them about it, they say they have no record of it. I emailed the TSB to them and the guys was pretty surprised he said they can't find it anywhere. My best guess is that they have an updated AWD module that no longer has the ground short issue and they expect you to just replace the AWD module with the new module. But for 300$ module plus 2 hrs of labor plus programming. That's a big job when some 16 awg wire, crimp, and a ring terminal can to the job for pennies at home.