48V Battery Issues NHTSA TSB
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From: Costco
2023 S500
48V Battery Issues NHTSA TSB
I’ve been reading up on this with mild apprehension. I found a reported TSB on NHTSA’s website for this model. Not sure if this is a repost, but it goes into detail what is causing these issues and how to fix them. The TSB can be found here: https://static.nhtsa.gov/odi/tsbs/20...06063-0001.pdf.
Apparently there are multiple issues that seem to mirror one another in regards to the end result. I copied the five listed causes from the TSB below. Simply put, it seems to be a mixture of software and hardware, so it’s not surprising some people are experiencing the “same issue” multiple times. It’s like whack-a-mole.
Cause
Cause 1: Software causes Intermittent No Starts with fault B183387 in DC/DC converter N83/1
Cause 2: Software causes Permanent No Start with fault B183349 and B183371 in 48V battery G1/3
Cause 3: Hardware short circuit in 48V system causes fault B183319 in 48V battery. May also have fault B183371.
Cause 4: Internal 48V battery Peltier cooling element failure causes fault B183397
Cause 5: This will Always have fault code B183371 but different from cause 2 and 3 -- it will Not have B183349, B183319, or any other faults in the 48V battery. This will only have fault B183371 in 48V battery. Cause 5 is from the 48V battery detecting an abnormality which then causes the 48V battery to disconnect itself. The disconnected 48V battery then causes subsequent symptoms: Limp Home Mode, overheating, A/C not blowing cold, or loss of accelera- tion
You can find a list of all recalls and active (or at least reported) service campaigns here: https://www.nhtsa.gov/vehicle/2022/M...Communications.
Apparently there are multiple issues that seem to mirror one another in regards to the end result. I copied the five listed causes from the TSB below. Simply put, it seems to be a mixture of software and hardware, so it’s not surprising some people are experiencing the “same issue” multiple times. It’s like whack-a-mole.
Cause
Cause 1: Software causes Intermittent No Starts with fault B183387 in DC/DC converter N83/1
Cause 2: Software causes Permanent No Start with fault B183349 and B183371 in 48V battery G1/3
Cause 3: Hardware short circuit in 48V system causes fault B183319 in 48V battery. May also have fault B183371.
Cause 4: Internal 48V battery Peltier cooling element failure causes fault B183397
Cause 5: This will Always have fault code B183371 but different from cause 2 and 3 -- it will Not have B183349, B183319, or any other faults in the 48V battery. This will only have fault B183371 in 48V battery. Cause 5 is from the 48V battery detecting an abnormality which then causes the 48V battery to disconnect itself. The disconnected 48V battery then causes subsequent symptoms: Limp Home Mode, overheating, A/C not blowing cold, or loss of accelera- tion
You can find a list of all recalls and active (or at least reported) service campaigns here: https://www.nhtsa.gov/vehicle/2022/M...Communications.
Last edited by Frenetic; Jul 2, 2022 at 08:22 AM.
