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Proactive maintenance is replacing the components?For sure, the 3.0 is the same IGBT’s and plugs. One internal board was changed for the bigger capacity pack.
It’s the insulation that fails, usually due to the PEM over heating, usually due to the PEM fan not working, usually due to the Fan plug not surviving the service unplugging and replugging. It seems to be more preventative to ensure the PEM fan is working and the connectors are in good shape.
I like the way you think, root cause.
Is there a guide to verifying PEM fan connectors?
Is it a latent fan failiure until it cascades?
Thank you.
But myFor sure, the 3.0 is the same IGBT’s and plugs. One internal board was changed for the bigger capacity pack.
Unfortunately the MOLEX connector that was chosen for the PEM & PEM FAN receptacle only have a mechanical life span of 25 connections per spec.
So every time they are mated, it breaks down a little. I've replaced mine twice as they break down after a bit. Here's what mine looked like before my last repair..
FAN Receptacle plug
View attachment 430235
Notice the corrosion/damage on plug pin #1
ON the bottom of the PEM the connection looks like this...
View attachment 430236
Some corrosion on pin #1 on the PEM jack, but not as bad as the receptacle plug.
I just replaced the fan side of the plug on the harness and used contact cleaner. Seems to so far eliminated the 1144/1146 errors.
My LCD display gets kind of wonky when it gets hot. Bad contrast, and I lose a bunch of lines of pixels. Looks kind of like a marquee with a bunch of burned out builbs. {shrug} No idea what happens in a Lotus, but it's not worth fixing to me.On my long drive home from California, a few different times, I saw the over the steering wheel LCD contrast go away, partially faded mostly on the right and it was difficult to read. It only seemed to happen when it was warm out, during the day, and and driving 2+ hours. Have you seen anything like this before?
That's never happened in my lotus. Good it's nothing to worry about. Thank you.My LCD display gets kind of wonky when it gets hot. Bad contrast, and I lose a bunch of lines of pixels. Looks kind of like a marquee with a bunch of burned out builbs. {shrug} No idea what happens in a Lotus, but it's not worth fixing to me.
I have the same in summer when it is hot, I loose some pixels in the left corner and they return when temperature goes down.My LCD display gets kind of wonky when it gets hot. Bad contrast, and I lose a bunch of lines of pixels. Looks kind of like a marquee with a bunch of burned out builbs. {shrug}.
Unfortunately the MOLEX connector that was chosen for the PEM & PEM FAN receptacle only have a mechanical life span of 25 connections per spec.
So every time they are mated, it breaks down a little. I've replaced mine twice as they break down after a bit. Here's what mine looked like before my last repair..
FAN Receptacle plug
View attachment 430235
Notice the corrosion/damage on plug pin #1
ON the bottom of the PEM the connection looks like this...
View attachment 430236
Some corrosion on pin #1 on the PEM jack, but not as bad as the receptacle plug.
I just replaced the fan side of the plug on the harness and used contact cleaner. Seems to so far eliminated the 1144/1146 errors.
the main problem here is the fact, that those plugs are designed for a max. current of 18A, a full blowing PEM-fan can pull up to 20A.
Replacing the female plug plus cleaning the PEM-side helps for a while but if you want to improve it a bit, use gold-plated connections (available from Molex !) on the female side when replacing.
I'm having the Level 2 PEM Gruber treatment done right now due to my ridiculous back up light issue in this thread:
Reverse Back Up Lights Not Working - Blown Fuse?
It was either that or paying Tesla $8000 for a remanufactured PEM that I imagined was pieced together with old parts from other PEM's. At this point I'm trusting Gruber more with the PEM than Tesla.
Yuck the 1.5 connectors seem far more robust.Unfortunately the MOLEX connector that was chosen for the PEM & PEM FAN receptacle only have a mechanical life span of 25 connections per spec.
So every time they are mated, it breaks down a little. I've replaced mine twice as they break down after a bit. Here's what mine looked like before my last repair..
FAN Receptacle plug
View attachment 430235
Notice the corrosion/damage on plug pin #1
ON the bottom of the PEM the connection looks like this...
View attachment 430236
Some corrosion on pin #1 on the PEM jack, but not as bad as the receptacle plug.
I just replaced the fan side of the plug on the harness and used contact cleaner. Seems to so far eliminated the 1144/1146 errors.
I'm having the Level 2 PEM Gruber treatment done right now due to my ridiculous back up light issue in this thread:
Reverse Back Up Lights Not Working - Blown Fuse?
It was either that or paying Tesla $8000 for a re-manufactured PEM that I imagined was pieced together with old parts from other PEM's. At this point I'm trusting Gruber more with the PEM than Tesla.