SiriusXM upgrade for 2015 Mustang

[jmbach]

Good afternoon everyone!

I am attempting to update the radio in my 2015 Mustang. The original radio is a FR3T-19C107-UE and planning to replace it with LR3T-19C107-CF from a 2022 Ford Mustang GT w/o premium audio.

Mustang ACM Original.abt (499 Bytes)

Mustang_New_ACM_20250510_121246.abt (1.2 KB)

Sync3 was previously installed and working with the original radio.

I did a similar upgrade for my 2019 Expedition successfully. Had to add a few wires and Asbuilt changes.

I am assuming a similar procedure.

Was looking at the connectors of the ACM and trying to compare them to the pinouts of a 2019 F150 and 2019 and 2020 Expedition.

My first attempt was adding
VMEG1 APIM pin 27 to ACM pin 5 CTRL MOD - BT/MM GW MOD DRDL_TX_+
VMEG2 APIM pin 28 to ACM pin 4 CTRL MOD - BT/MM GW MOD DRDL_TX_-

As the other connector was already populated. So assumed I do not need them.

With that I had no volume control but could turn the radio on and off as well as tune.

Any help would be appreciated.

Thanks.

[bill32399]

Does the ACM have a Blue A2B connector?

[jmbach]

No. Just XM antenna, radio antenna, and two connectors.

[bill32399]

Pretty sure the pinouts are the same. I found where they added a second pair of wires on one of them but I would have to go back and look at the wire diagrams. I think that was a Sync4 system that added those.

[jmbach]

I did not check the APIM connector but the ACM connector is already populated where the following connections need to be made.

VMEF7 APIM pin 51 to ACM pin 6 CTRL MOD - Audio Head Unit DRDL_TX_+
VMEF8 APIM pin 52 to ACM pin 19 CTRL MOD - Audio Head Unit DRDL_TX_-

So I am thinking it is mainly Asbuilt programming. The asbuilts are so widely different I am having a tough time trying to translate the old to the new.

[warlock12118]

The other problem you might run into is if that L series ACM is an X40 unit and you’re not using a K or L series APIM

[bill32399]

@jmbach

The asbuilts are so widely different I am having a tough time trying to translate the old to the new.

Yea sadly there is not much info out there for the different models and calibrations.

Myself and @RD4154 have tested the x40 with APIM’s greatly and it only works with a K series APIM, With the right calibration and up.

[jmbach]

Well after a lot of flipping screens comparing old ACM asbuilt, new ACM asbuilt, and scouring the asbuilt database, I cobbled together an asbuilt that seems to be working. I am able to adjust the sound and all looks like it is working. Will see how things go over time.

[bill32399]

Nice. I put an ACM with ANC in my Expedition and the ACM AB from others and newer don’t seems to work at all. Glad you got yours figured out.

[F150Chief]

@bill32399

I think that was a Sync4 system that added those.

Sync 4, yes…

[F150Chief]

Post the asbuilt if you want I’ll take a look…

[jmbach]

Here is the final. The first post has the original ACM asbuilt and the new ACM asbuilt.

Working_ACM_20250511_000554.abt (1.2 KB)

Thank you.