Safety Recall 22S41 - 2021-2022 Mach E - HVBJB Recall [high voltage battery main contactors may overheat]

[JeanneB]

The HS-CAN (highspeed CAN) is only 512kbps. Additionally, flashing with FDRS basically uploads the entire software package to the module. OTA updates a) do delta/differential patching; b) updates the "B" side of the module, then switches operation over to that, then updates the "A" part, while FDRS requires that to be done in a single session.


Computer crashing doesn't mean things are screwed. I have messed up my FDRS flashing many, many times and each time I restarted, FDRS saw my module needed an update, and proceeded to attempt the flash again. It didn't even flinch about the failure.

They couldn't get the car to run after that. They did a master reset 6 or 7 times. Finally the engineer from Ford came out.

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[breeves002]

On good authority? Anything greater than around 10mbs (the speed of old school ethernet) is probably going to be faster than OTA even assuming a good, solid wireless connection and no server stress. Either way, whichever gets to the cars faster is the faster solution.

HS CAN is 512kbps, FD CAN is flexible and can be significantly faster. Automotive ethernet can be up to 1gbps but not much is known about how Ford uses it. Also the ethernet is only shared between a handful of modules and the diagnostic scan tool doesn't connect to it. OTA can be significantly faster than OBD updates.

The HS-CAN (highspeed CAN) is only 512kbps. Additionally, flashing with FDRS basically uploads the entire software package to the module. OTA updates a) do delta/differential patching; b) updates the "B" side of the module, then switches operation over to that, then updates the "A" part, while FDRS requires that to be done in a single session.


Computer crashing doesn't mean things are screwed. I have messed up my FDRS flashing many, many times and each time I restarted, FDRS saw my module needed an update, and proceeded to attempt the flash again. It didn't even flinch about the failure.

Keep in mind theres also FD CAN for many modules and I believe the VCM 3 can take advantage of it.

I've had FDRS crash too and I just restart it and pick up where I left off no issues.

 

[Ajax]

I was considering a halfway-cross-country trip from the Midwest to the east coast in the next week or two, but it seems like it's not a good time for that—I'd likely be doing a lot of DCFC and powering through in 2 days. It would be a 2500 mile round trip. I guess the software update might land during the trip, but can't bet on that. Anyone else in the same sort of pickle where you're reconsidering a longer trip?

 

[scoopman]

I was considering a halfway-cross-country trip from the Midwest to the east coast in the next week or two, but it seems like it's not a good time for that—I'd likely be doing a lot of DCFC and powering through in 2 days. It would be a 2500 mile round trip. I guess the software update might land during the trip, but can't bet on that. Anyone else in the same sort of pickle where you're reconsidering a longer trip?

Yes and I already have a car rental planned for next week’s 1000 mi road trip with my wife and kids.

Definitely not trusting my GT lack-of-performance edition for this at least until I have the software and/or redesigned part.

Definitely not happy that I will be paying a lot for a rental car because have an expensive fast Mach E that I can’t trust, and which Ford intends to make more reliable by making it slower. Especially considering they already redesigned the faulty part, and just don’t think it’s important enough to put it in the GT cars that are most likely going to be hobbled by limiting power.

I generally have bought European cars. This is my first and probably last Ford because of the clear lack of testing of their most expensive model, and because of how they are not standing behind the car they promised me when I bought it.

It’s just not acceptable to me to take away performance of the PERFORMANCE EDITION car I bought to make it have basic reliability on public roads.

 

[agoldman]

What will come first, May 25th and on deliveries, or the first wave of OTA patches? Whichever, we should pretty quickly know if there are any side effects to this patch . . power, charging or otherwise.

 

[UW2]

How do you find out If your car is on the infected list? Thanks

I found out because the dealer added that repair to my list of items (to repair). However, they called and said there is no fix yet...

 

[Thor2j]

(yes, I do have a background in EE although I do other things professionally)

you have the order of events backwards.

yes, the relationship of power, resistance and temp is how they can detect temp rise without a temp sensor... I explain that a few times much higher up in this (massive) thread.

However, to show temp rise above baseline you have to have resistance above baseline... once you have that increased resistance, it NEVER goes away. So the SW will reduce power by some amount determined by the algorithm. The point being, this does nothing to fix the defective part... it may stop the defective part from stranding your car but potentially at the cost of significantly PERMANANTLY reducing current flow through the relay.

As an extreme example to make my point... if the current were limited to 20% of the current maximum, the part will never fail. However, the "cure" can be worse than the disease.

Problem with this theory is the lower models draw half the amps as the gtpe. Assuming they use same contractors you would have to lower all to a common denominator.

 

[Cjpayne]

While I have been very happy with my GT so far (Sep '21 delivery), if the final solution from Ford is to reduce the performance I will be disapointed. I can live with the 5 second limitation (although not overjoyed), but further performance limitations with no hope of remedy with not be acceptable. So I am holding out hope that Ford will do the right thing in the end. Time will tell.

 

[Lucky luke]

Problem with this theory is the lower models draw half the amps as the gtpe. Assuming they use same contractors you would have to lower all to a common denominator.

Why is Ford not investigating on reducing the temperature, to cool down? Isn't this a better option? Do not ask me how, I am not a specialist. But if I watch the video some pages ago....

 

[Neil4Real]

Why is Ford not investigating on reducing the temperature? Isn't this a better option? Do not ask me how, I am not a specialist. But if I watch the video some pages ago....

How do you reduce the temperature a) more cooling b) reduce the thing causing the heat

They can't really add more cooling on already built vehicles, that may come with a refresh, so all they can do is reduce power/charging to reduce the heat.

 

[Lucky luke]

How do you reduce the temperature a) more cooling b) reduce the thing causing the heat

They can't really add more cooling on already built vehicles, that may come with a refresh, so all they can do is reduce power/charging to reduce the heat.

That's my point: review the cooling for new versions. Not a solution for already build cars, however, I fully agree

 

[Kamuelaflyer]

That's my point: review the cooling for new versions. Not a solution for already build cars, however, I fully agree

What leads you to believe they're not looking at cooling changes on later models?

 

[RickMachE]

Don't repeat this, but a possible fix runs a hose from the frunk drain to the contactors, and then filling the frunk with ice before a trip. You didn't hear this from me.

 

[Bigfeets]

Don't repeat this, but a possible fix runs a hose from the frunk drain to the contactors, and then filling the frunk with ice before a trip. You didn't hear this from me.

 

[riddles]

I recently purchased my MME from a customer cancelled order. However, I couldn't take it home from the dealer because of this recall. I am moving across the country soon and am worried that I might not have possession of the vehicle by then. Am I legally locked into the loan for the car at this point? The loan cannot be processed until the recall is completed.

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