HELP - Multiple fault warnings after latest OTA

[Teslaeata]

For information, my right rear door module threw DTCs and the dash warning apparently for no other reason than updates loaded at dealership during that HVBJB replacement.

There was no physical or other work undertaken in the area of the right rear door, or any doors.

Would’ve cost nearly £800 to replace but for warranty contribution.

Therefore, there need not be physical evidence of damage, connection or other issue causing the fault reporting.

Hope this is of some interest and/or helps in at least a small way.

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[MikeC]

I have an FDRS license good through tomorrow. Once I am done doing what I need to do with it, I will get you the files in case you need to program it. Hopefully it doesn't ban my account before I get a chance to grab them.

Edit: I got the files. If the module is not on the AM strategy when you put it in, you should update it to the current version that the one that is in your car now is on. If that's the case, lmk and I'll walk you through it. You would need FORScan.

Many thanks Javier

 

[MikeC]

The photo is the module from my car. Hopefully the module from the scrappy will be the same (I uploaded the photo to the scrappy website so the one they send should be the same, I so hope so )

Module they were going to send me was the wrong one. They are sourcing the correct one but delivery might not be until late June . Hey ho!

Out of interest what is the difference between all the different module types? There is :-
JX7T-14B531-BD, JX7T-14B531-BC - These are both marked driver and I think they are the same?
JX7T-14B533-BG, JX7T-14B533-BC - These are both marked Passenger, are they for the rear doors?Are there others?

 

[rugedraw]

Module they were going to send me was the wrong one. They are sourcing the correct one but delivery might not be until late June . Hey ho!

Out of interest what is the difference between all the different module types? There is :-
JX7T-14B531-BD, JX7T-14B531-BC - These are both marked driver and I think they are the same?
JX7T-14B533-BG, JX7T-14B533-BC - These are both marked Passenger, are they for the rear doors?Are there others?

Unfortunately, I don't have access to the parts catalog in PTS/OASIS anymore. Not sure what the difference is.

 

[Michael MM]

Module they were going to send me was the wrong one. They are sourcing the correct one but delivery might not be until late June . Hey ho!

Out of interest what is the difference between all the different module types? There is :-
JX7T-14B531-BD, JX7T-14B531-BC - These are both marked driver and I think they are the same?
JX7T-14B533-BG, JX7T-14B533-BC - These are both marked Passenger, are they for the rear doors?Are there others?

This is a copy-paste of the ChatGPT response after I get it your message. Here it goes:
Yes — Ford’s numbering convention here is actually pretty logical once you split the base number from the suffix.


The important part is:

• 14B531 = Driver Door Module (DDM)
• 14B533 = Passenger Door Module (PDM)

So:

Part number	Meaning
JX7T-14B531-BD	Driver/front left door module
JX7T-14B531-BC	Driver/front left door module
JX7T-14B533-BG	Passenger/front right door module
JX7T-14B533-BC	Passenger/front right door module

The 531 vs 533 distinction is the key thing. Ford consistently uses:

• 531 = left/driver
• 533 = right/passenger

The “Driver” and “Passenger” labels are therefore referring to the front doors, not rear doors. Rear doors usually have simpler slave modules or LIN-controlled motors depending on vehicle/platform.


The final two letters (BC, BD, BG, etc.) are revision/feature variants. They usually indicate:

• hardware revision
• firmware generation
• option level
• regional spec
• mirror/power-fold/BLIS support
• memory seat compatibility
• safe-lock/alarm support

Ford often keeps the same base function but changes suffixes as features evolve. People retrofitting Ford modules run into this a lot. For example, some suffixes support BLIS or power-fold mirrors while lower trims do not.


So your assumption is mostly correct:

• JX7T-14B531-BC and BD are both driver door modules and may interchange physically
• JX7T-14B533-BC and BG are both passenger door modules and may interchange physically

…but whether they fully work depends on:

• your exact vehicle/platform
• feature set
• As-Built configuration
• firmware compatibility

Ford modules are often programmable via FORScan, but not always plug-and-play.


There absolutely are other variants. You’ll commonly see:

• -AA
• -AB
• -AC
• -AE
• -AG
• -AK
• etc.

Those are usually earlier or alternate revisions for different trims/models/years. Examples of other JX7T door modules include:

• JX7T-14B533-AE
• JX7T-14B533-AG
• JX7T-14B531-AK

One more useful detail:
Ford engineering numbers also encode the original vehicle program:

• JX7T is the engineering prefix/platform generation
• different prefixes (H1BT, DG9T, LU5T, etc.) are different eras/platforms but often similar module families

So when matching replacements, the safest approach is:

1. Match the full part number exactly if possible
2. If not, keep:
   • same 14B531 or 14B533
   • same platform family (JX7T)
3. Then verify features/coding compatibility before swapping suffix revisions.

 

[MikeC]

Hi Michael,
Wow, thanks so much for all that info, that is so useful. So as my driver door (front right) is a JX7T-14B531-BC (Driver/front left) the list is aimed at left hand drive cars, makes sense.

 

[Michael MM]

@MikeC Hi Mike
How did the replacement go?

 

[MikeC]

Hi Michael @Michael MM, sorry should have updated earlier. Received the correct module, fitted it and no difference. As Built coding was correct and module tested ok with FORScan. Connecting my Autel tool and pressing on the door to car harness seemed to generate another fault code. Not pressing the harness the fault code would clear, pressing again, fault code back again. So took the door off and inspected the wiring, hoping to find a broken wire but no luck there either.
So door back on, and original module back in and I’ll leave it for now to see if anyone on this wonderful forum has a fix solution . Sorry wish I had some positive news.

 

[Michael MM]

Hi Michael @Michael MM, sorry should have updated earlier. Received the correct module, fitted it and no difference. As Built coding was correct and module tested ok with FORScan. Connecting my Autel tool and pressing on the door to car harness seemed to generate another fault code. Not pressing the harness the fault code would clear, pressing again, fault code back again. So took the door off and inspected the wiring, hoping to find a broken wire but no luck there either.
So door back on, and original module back in and I’ll leave it for now to see if anyone on this wonderful forum has a fix solution . Sorry wish I had some positive news.

It is a pity all your efforts did not yield the desired results.

I am still in contact with Ford Customer Service. They are trying to convince the authorised service centre to swallow some of the quoted costs.
BOTH Ford and TrustFord have so far declined to provide detailed description of what is wrong. The have BOTH declined to quote the part numbers of the modules they claim need replacing. Quite interesting. So they want to take money for parts and labour, but they do not want to provide verifiable information that can be checked independently of neither the components, nor, consequently, of the time and labour it would take to replace those.
The more this drags on, the less confident I get that either of them actually knows what the issue is.
Not happy, I am.

 

[MikeC]

……….
Not happy, I am.

I completely empathise. It does seem a little strange, and as much as the last and the only one OTA I’ve had in a year (OBCC-AS.AU, the one you mentioned in your first post), my ‘door malfunction’ problem started. As much as the OTA was not related to the door module, my experience with programming, changes in coding can inadvertently affect other parts of the program. Who knows the next OTA (if I ever get one), may fix the problem .

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