L2 charging speed recently dropped 33%

[azerik]

Anyone have

I will bet you a six pack it is not intended and there will be an OTA fix in a couple months.

And in the mean time... We can all charge for 30% longer!
I checked for codes, I got nothing. I still have the 'Guess what your charge ring is trying to tell you game' going on but tomorrow will pull the neg terminal and swap my EVSE out for another one and see if anything changes.

Sponsored

 

[RickMachE]

This thread is a prime example of where @Ford Motor Company could dramatically improve the relationship with the customer. An issue is observed. Ford sees/hears/reads about it. They start looking into it.

"We are looking into this".

Then:

"We have replicated the issue ourselves, and collected data from others, and are looking into a fix".

 

[azerik]

This thread is a prime example of where @Ford Motor Company could dramatically improve the relationship with the customer. An issue is observed. Ford sees/hears/reads about it. They start looking into it.

"We are looking into this".

3 of my best guys on it now....


It completely baffles me why @Ford Motor Company wouldn't have people that run this kind of issues up the chain. Hell NASA has tiktok and twitter 'agents' dedicated people on just that. Get off your ass Ford, we're paying for this kind of abuse and we're vocal. This forum specifically for the MME.

 

[Shayne]

I will bet you a six pack it is not intended and there will be an OTA fix in a couple months.

2 months for everyone to receive it? I think you are optimistic.

Could be limiting power due to a known hardware problem? Would not be the first time we see bandage software fixes for a hardware problem. Not saying either of us are right just throwing out possibilities. I will however raise you to 6 Canadian beers.

 

[mkhuffman]

2 months for everyone to receive it? I think you are optimistic.

Could be limiting power due to a known hardware problem? Would not be the first time we see bandage software fixes for a hardware problem. Not saying either of us are right just throwing out possibilities. I will however raise you to 6 Canadian beers.

I am assuming they will expedite the fix.

Is there a Canadian IPA? Once I switched to IPA, all other beers taste like water. I really like the strong hoppy flavor. And some are even hoppy and fruity! (That means it is more healthy.)

 

[Shayne]

I am assuming they will expedite the fix.

Is there a Canadian IPA? Once I switched to IPA, all other beers taste like water. I really like the strong hoppy flavor. And some are even hoppy and fruity! (That means it is more healthy.)

Have a few 5% sleeman original draughts ice cold in the beer fridge that may knock your socks off and change your mind.

 

[azerik]

Well, I pulled a 12 V battery for 10 minutes tried opening and closing the doors a few times to try to kill the battery as much as possible. Plug it all back together plugged in the new wall connector and the fan kicked on extremely high as soon as it was plugged in. It’s about 115° outside in the driveway right now. But my fluid pump is now running for the first time in a long time since I’ve on this car. Last time I actually heard the fluid pump run was in February sometime, car is currently sitting at 40 amp charge for 10 minutes. We’ll see where we’re at in 10 minutes.

 

[Mach-Lee]

Well, I pulled a 12 V battery for 10 minutes tried opening and closing the doors a few times to try to kill the battery as much as possible. Plug it all back together plugged in the new wall connector and the fan kicked on extremely high as soon as it was plugged in. It’s about 115° outside in the driveway right now. But my fluid pump is now running for the first time in a long time since I’ve on this car. Last time I actually heard the fluid pump run was in February sometime, car is currently sitting at 40 amp charge for 10 minutes. We’ll see where we’re at in 10 minutes.

Wow, so it wasn't running the fluid pump?! That would definitely overheat the charger module since it's liquid cooled.

Hope it works.

 

[azerik]

Sad to say, it’s back to 40 the 28 amp cycles. not the fix.

 

[ChuckA]

My JuiceBox 32 on a 50A circuit is unchanged charging at 7.33 kWh. I guess the issue only affects the 40A & 48A setups.

 

[Mach-Lee]

Sad to say, it’s back to 40 the 28 amp cycles. not the fix.

Bummer. Was it still running the fluid pump?

My pump runs continuously and the fan cycles on and off while charging >40A.

 

[jgcom]

My pump runs continuously and the fan cycles on and off while charging >40A.

Mine does not run now when attempting to charge at 40 A. It certainly did run before!

I think you've hit the nail on the head. Perhaps the bug/mis-feature some of us are contending with is that the pump doesn't run at high charge current, forcing some kind of thermal-control fallback that uses current throttling only. While I'm wildly speculating, I would further guess that the fan doesn't run because it is controlled based on the fluid temperature somewhere else in the circuit.

 

[Shayne]

Been going down to 10C (50) here lately at night and my fan at 40A never comes on. It is normally dead silent other than the hum. I see it drip to 5, 6 and see 8KW. It was finished in my time slot (low rate and 100 amp service) so it works here as long as jumping around like that is not hurting anything.

Slowest charge that makes the slot would be OK for the batteries and they may be warm when you jump in. It meets everyone's schedule. Have not read that someone needs the 48A to keep up with them; not meeting schedules would be a problem. Plug in 40A is more than enough to meet my schedules. Appears it can slow down to 5 and 6 and still (just) make it. 20 to 80 10 to 7 is 6KW.

 

[hawkeye3point1]

My 2021 Job 2 has not started reducing the charge rate, but something seems to have changed re: OBCC cooling strategy. Last year my car had a single episode of charge cycling, it would stop momentarily then resume every couple of minutes. I started monitoring the AC coupler temp. value in Carscanner to see if a pattern was developing. I observed that the coupler temp. would rise above 135F then go down to 127F consistently, coolant pump could be heard cycling. I believe this was the normal behavior before the OBCC OTA, which I got on June 2.

The graphs are from charges before and after the OTA. Coupler temp. gets well above 135F now and does not show the previous cooling. Where there's smoke, there's fire. Charging varied from 6 to 8 kWh at the HVB.

Those extreme Coupler temp. readings some have seen have to be a conversion error that may be unique to Job 1 MMEs.

FYI, I never could find the Coupler temp. that throws a fault for the MME, but I came across a Porsche TSB that stated 195F was the threshold for the Macan, FWIW.

 

[Mach-Lee]

My 2021 Job 2 has not started reducing the charge rate, but something seems to have changed re: OBCC cooling strategy. Last year my car had a single episode of charge cycling, it would stop momentarily then resume every couple of minutes. I started monitoring the AC coupler temp. value in Carscanner to see if a pattern was developing. I observed that the coupler temp. would rise above 135F then go down to 127F consistently, coolant pump could be heard cycling. I believe this was the normal behavior before the OBCC OTA, which I got on June 2.

The graphs are from charges before and after the OTA. Coupler temp. gets well above 135F now and does not show the previous cooling. Where there's smoke, there's fire. Charging varied from 6 to 8 kWh at the HVB.

Those extreme Coupler temp. readings some have seen have to be a conversion error that may be unique to Job 1 MMEs.

FYI, I never could find the Coupler temp. that throws a fault for the MME, but I came across a Porsche TSB that stated 195F was the threshold for the Macan, FWIW.

I think the data parameter is wrong in Car Scanner, what you're actually looking at is the on-board charger internal temperature. FYI the charge port is not liquid cooled. The charger power electronics are liquid cooled. I also think the temp scales are wrong in Fahrenheit.

It looks like for whatever reason, on some Mach-E's the motor electronics coolant pump is not being turned on when it should, and as a result the charger electronics overheat and the charging rate is derated in order to protect itself from thermal damage.

Sponsored