21DD21 REME intermediate circuit voltage: comparison error

[RP67]

Hi All, just checking whether anyone had experience with this, perhaps can help me to clear this. It came up after replacing the EME unit (with control board swap) to attempt to solve the no AC charging issue. After replacement, AC charging issue solved, initiated AC charging several times, with no fault codes. By the time I finished to assemble drive shaft, wheel arch liner bumper etc and filled up the system with coolant the car came up with the dared drive train error and charging is not possible message. Obviously the high voltage battery relay is not starting...
I would much appreciate any suggestion, as I'm running out of ideas.
The car is a 2014 Rex, 12V battery is approximately one year old. Before replacing the EME, I had DC charging and the rex also been able to maintain the HV battery SOC. The HV battery is sitting on 60% charge at the moment.

 

[Stevick]

From the fault code lookups, it seems you might want to check the HV connections between the EME and HV battery, perhaps for looseness or corrosion. I should probably add that you do so safely.

 

[RP67]

From the fault code lookups, it seems you might want to check the HV connections between the EME and HV battery, perhaps for looseness or corrosion. I should probably add that you do so safely.

Hi, thanks for the bump, I had an unsecured HV cable between the EME and KLE. This is the hard to get to place, and hardly accessible, so took me awhile to get the bottom of it. The car drives, charges fine, and no issue with it ever since.

 

[Stevick]

That's great to hear!

 

[prezesmarek]

Hello Guys. 61126840444 (Number4) Is this easy to swap do i need a lift ? Im having a problems on screen " Drivetrain check soon" Service has detect issue 61126840444 cable demage

 

[RP67]

Hello Guys. 61126840444 (Number4) Is this easy to swap do i need a lift ? Im having a problems on screen " Drivetrain check soon" Service has detect issue 61126840444 cable demage

It's a bit of fiddling, but doable. Although I'm not sure if that is your issue, unless there is a visible damage to the cable...

 

[prezesmarek]

It's a bit of fiddling, but doable. Although I'm not sure if that is your issue, unless there is a visible damage to the cable...

Yes its visible. Cable is broken. The error sometimes comes back after rain weather.

 

[RP67]

Yes its visible. Cable is broken. The error sometimes comes back after rain weather.

Sorry, I was looking the wrong cable (12). I'm not sure about #4.

 

[RP67]

To be fair, the only tricky part could be alongside the HV battery... From memory, it is under (above) the lip of the battery, so you need to lower it in order to access.

 

[prezesmarek]

To be fair, the only tricky part could be alongside the HV battery... From memory, it is under (above) the lip of the battery, so you need to lower it in order to access.

 

[prezesmarek]

Ive just found a video Its seems that no need to lower the battery need to remove

BMW i3 strip down ep 14, side skirts ​

 

[RP67]

Yeah, you probably got lucky with that.