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Bought a 2014 ED, bad AC compressor?


Xen0

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I bought a 14 Smart Electric Drive today that Mercedes has diagnosed with a shorted AC compressor.  The car shows the EV System Workshop message, and there's no heat, power steering and of course AC.  It does drive and charge ok.  Anyone else have a problem like this before? 

 

I'm going to connect my Delphi DS150 and see if I can read codes, but I thought I'd check here to see if anyone has had a similar issue.  

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Delphi doesn't read EV systems it seems.  I imagine the best bet is a Star system, been wanting an excuse to buy one.  Which version is most compatible?  C4?  C5?

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Funny enough, AC compressor works great when it's connected.  Found a chaffed harness on the right side of engine compartment, rubs against an HV wire mount.  Found a few wires that had some of the insulation scuffed off, but the blue/white is completely broken.  That happened to run to the AC compressor.  Soldered and cleared the codes with Autel MaxiAP200 and AC is working!  Too bad it's the wrong season for AC.

 

Which brings me to the last piece of the puzzle, PTC heater is still not working.  Tried the solder trick shown on evilution and no dice.  Keep getting U145641 Implausible data from PTC heater code, although I can read live data from the heater so it's communicating on the CAN bus.  Other odd thing is live data shows no HV voltage supply, and also 0% heat requested.

 

Anyone have a spare heater to sell?

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Screenshot_20241109_231656_Autel MaxiAP200.jpg

Edited by Xen0
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  • 4 weeks later...

Thought I should update my original thread.  I ordered a replacement PTC heater from a junkyard in Quebec, replaced the heater and it works perfectly.  I also had ordered an openport + xentry kit from Aliexpress and was able to dedicate an older i5 laptop to be my Xentry scantool.  Xentry is an ESSENTIAL tool in my opinion, EV or not.  I was able to access every system and clear every code.  Car is working perfectly now with no remaining malfunctions.  

 

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I agree all smart car owners who want to do any type of work on their own cars must own a STAR system or have someone close to them who owns one. Until you have experienced the positive uses for it you just won't understand. Glad you have it, life will be so much easier from now on.

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