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#1
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E70 Voltage issue
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#2
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Yes I agree this is strange. Well that said I bought it and will be reporting back with my findings.
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#3
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Sub 12 volts I don't think is uncommon before startup. However, at least 13v is important to achieve once the vehicle is started. Im guessing maybe the donar vehicle has a smaller battery, no?
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#4
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It was another X5 E53 to be exact so another group 49 battery. I don't think the alternator is coming on line as I was able to start but only runs for 3-5 seconds before shutting down and lots of error codes.. This is a new vehicle to us and has sat for over a year. I finally have it in my car port so will get a better chance to check fuses, connections etc. Will report as I go through the systems. Thank you
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#5
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Today I was able to confirm for the 5 seconds the car would run the alternator was not charging. Now onto finding out whats at fault, alternator or DME.. Lots of codes thrown after the 5 second run. One of the more notable was - Alternator not seen. Voltage regulator??
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#6
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pull the alternator and replace the voltage regulator piece. mine works great now. prior to this we threw codes and transmission went i to limp mode.
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#7
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I agree. I just ordered one.
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#8
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Also going to pickup a pair of the Blue relays for the DME. I don't mid spares..
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#9
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What is so special about the blue relays? And speaking about dme relays, which are responsible for the communication with the valvetronic computer?
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#10
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DME relays were/are a known failure point, especially for my old Porsche. Just though I would cover off another potential culprit. The relays are blue in colour and located by the DME. DME talks to quit a few components so keeping a close eye on the thing. Spent quite a bit of time today checking all the fuses (Got to love the front fuse box..) All fuses were good. My BIG concern is this thing sat for well over a year and owner reports it running when parked due to rear bags collapsed and pump not operational (Confirmed pump not working and main 40A fuse blows - Looking for a replacement so somewhere over that time something went off the rails. I guess its possible the regulator could have gone faulty over that time frame. Or that was another reason it was parked.
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