48 Volt Battery!!!!!
#1
48 Volt Battery!!!!!
I thought we were done with this issue....
MY22 with 52K miles. Driving home last night and received a large "Malfuntion" messsage followed by the following messages. Had to limp home with heat set to 80 degrees. Normal operation this morning. Had 48V recall work for grounding issue performed 2 weeks ago. Perhaps that made it worse. Have to wait a week for MB service. Hope it lasts long enough.
MY22 with 52K miles. Driving home last night and received a large "Malfuntion" messsage followed by the following messages. Had to limp home with heat set to 80 degrees. Normal operation this morning. Had 48V recall work for grounding issue performed 2 weeks ago. Perhaps that made it worse. Have to wait a week for MB service. Hope it lasts long enough.
Last edited by TonyF61; 05-10-2024 at 01:35 PM.
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TonyF61 (05-15-2024)
#4
Is this a 48v battery issue or a cooling system issue? I think there is a dedicated/aux cooling loop, with separate radiator, for the battery. I know about the radiator as I got a rock through my radiator under the car.
#6
If the car started the 48v battery is good. The question is whether the battery caused the overheating of the coolant or the overheating of the coolant suggested the 48v battery is no longer being cooled. There is a radiator/cooling process specific to the battery. Not sure how it is linked to the main cooling circuit. I do know I lost all coolant when the battery radiator was punctured. Will be interesting to hear what the problem is.
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#8
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TonyF61 (05-13-2024)
#10
"Coolant" message - I was on the highway.Therefore, if the battery failed first, then it is conceivable that collant would rapidly heat up. At the time of message, collant was at 224 degrees and increasing.
My concern will be service dept. telling me they "couldn't duplicate the issue."
Last edited by TonyF61; 05-13-2024 at 02:42 PM.
#11
Mine has been solid for the last two years after the 48v died and left me stranded. Just got the ground connection recall in the mail today, so will have to get that scheduled.
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TonyF61 (05-14-2024)
#12
Got my car back this afternoon after they did the battery recall work. I'm nervous now and waiting to hear how yours turns out, especially given the timing of your recall work. It's hard to guess how the two could be related, but who knows. Sure sounds like the battery overheated...... However, it seems your battery is now working ok. Good luck!
#13
Got my car back this afternoon after they did the battery recall work. I'm nervous now and waiting to hear how yours turns out, especially given the timing of your recall work. It's hard to guess how the two could be related, but who knows. Sure sounds like the battery overheated...... However, it seems your battery is now working ok. Good luck!
Although it has been running fine since, I think about it whenever I go for a drive. However, as I mentioned earlier, I am concerned that I am going to get the "we couldn't duplicate the issue" or "couldn't find anything wrong" speach. Probably will not get it back before Monday evening, so look for a post on Tuesday morning.
Good luck with yours.
#15
My appointment is this Friday, 5/17. I will keep you posted.
Although it has been running fine since, I think about it whenever I go for a drive. However, as I mentioned earlier, I am concerned that I am going to get the "we couldn't duplicate the issue" or "couldn't find anything wrong" speach. Probably will not get it back before Monday evening, so look for a post on Tuesday morning.
Good luck with yours.
Although it has been running fine since, I think about it whenever I go for a drive. However, as I mentioned earlier, I am concerned that I am going to get the "we couldn't duplicate the issue" or "couldn't find anything wrong" speach. Probably will not get it back before Monday evening, so look for a post on Tuesday morning.
Good luck with yours.
#16
With how these error messages you’ve seen are stored on-board and with MB’s 48v issue history, my guess is that the dealer will be all over this issue for you. My bet is that you might be without a vehicle for 4-5 days while they secure parts, but once fixed, you won’t half to think about it again. Fingers crossed!
Last edited by Charcharius; 05-16-2024 at 09:00 AM.
#17
I've been thinking about this in case they can't "duplicate" the issue. If we assume that the battery overheated, causing the coolant temperature to go up, was there a period just before you got the message that the battery was charging for an extended period? For example, on mine, the 48V battery charges when you brake and a little when coasting, etc. Maybe overcharging during an unusual charging event caused it to overheat? That "could" explain why it happened once but is normal now. Maybe a fault in the charging system and not the battery? Just reaching for ideas...... Also, I assume you checked the coolant level to make sure it is not low. I think the battery cooling circuit is separate from the other systems, but I know the coolant source is common. When I lost my battery radiator, it drained the entire system. Look forward (anxiously) to hearing what your dealer says.
I will follow up on Tuesday.
#18
I can totally empathize with being concerned over this, especially given the safety concerns with high power systems and with how an inoperative 48v battery can leave you stranded (ask me how I know).
With how these error messages you’ve seen are stored on-board and with MB’s 48v issue history, my guess is that the dealer will be all over this issue for you. My bet is that you might be without a vehicle for 4-5 days while they secure parts, but once fixed, you won’t half to think about it again. Fingers crossed!
With how these error messages you’ve seen are stored on-board and with MB’s 48v issue history, my guess is that the dealer will be all over this issue for you. My bet is that you might be without a vehicle for 4-5 days while they secure parts, but once fixed, you won’t half to think about it again. Fingers crossed!
#19
The results are in...
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
#20
Senior Member
Joined: Apr 2011
Posts: 348
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
The results are in...
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
It seems like the "48v Battery" warning is a generic warning for something on the 48v power bus setting a DTC.
#21
The results are in...
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
Picked up the vehicle on Friday evening. There was nobody around to discuss the results with.
1. 48V battery - they found a "Stuck Actuator" - not sure what that this has to do with a bettery; perhaps charging. However, if it was stuck, then the problem should have continued for the week that I waited for the appointment.
2. Coolant Temp. - They found no isues with level or leaks; therefore I am going to presume it was related to battery issue, which caused lack of circulation.
#22
Senior Member
Joined: Apr 2011
Posts: 348
Likes: 141
2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
This makes sense. The actuator stuck causing the battery to overcharge which caused the overheating. It is now clearly "unstuck" and charging normally. You may have noticed that the charge indicator stayed on while it was overcharging. This would imply the actuator is mechanical which is surprising. Digital controllers typically don't get "stuck". The question now is why didn't they replace the actuator and did the overcharging damage the 48v battery?
- There was a warning about the 48v battery
- Then a warning about the engine coolant being too hot
This leaves lots of questions.
- What does the actuator actuate?
- Is it simply a translated term for a relay?
- Was it for the coolant pump or something else?
- Why was the message for the 48v battery if it was an actuator that failed?
- Did the entire 48v system shut down?
And of course finally - Why did the engine coolant get hot?
Knowing that the coolant pump is 48v and the coolant got hot after the warning it's likely that the coolant pump stopped after the warning. Nothing from the service report indicates that the 48v battery itself was overcharging, got hot, has active heating/cooling, or any other issues. The MB technicians likely also don't have the answers to these questions highlighting the frustrating part of troubleshooting modern vehicles.
#23
I think you're reading too much into it. All we know is:
This leaves lots of questions.
Knowing that the coolant pump is 48v and the coolant got hot after the warning it's likely that the coolant pump stopped after the warning. Nothing from the service report indicates that the 48v battery itself was overcharging, got hot, has active heating/cooling, or any other issues. The MB technicians likely also don't have the answers to these questions highlighting the frustrating part of troubleshooting modern vehicles.
- There was a warning about the 48v battery
- Then a warning about the engine coolant being too hot
This leaves lots of questions.
- What does the actuator actuate?
- Is it simply a translated term for a relay?
- Was it for the coolant pump or something else?
- Why was the message for the 48v battery if it was an actuator that failed?
- Did the entire 48v system shut down?
And of course finally - Why did the engine coolant get hot?
Knowing that the coolant pump is 48v and the coolant got hot after the warning it's likely that the coolant pump stopped after the warning. Nothing from the service report indicates that the 48v battery itself was overcharging, got hot, has active heating/cooling, or any other issues. The MB technicians likely also don't have the answers to these questions highlighting the frustrating part of troubleshooting modern vehicles.
#24
Senior Member
Joined: Apr 2011
Posts: 348
Likes: 141
2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
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mikapen (05-21-2024)