Hello All,
So a week or so ago, our 2013 P85 threw a slew of errors at home as we went to leave (i.e. Unable to Drive: Voltage supply too low; Electrical system power reduced: Vehicle may shut down unexpectedly; Power reduced: Vehicle systems shutting down; Vehicle may not restart: service is required). Shortly thereafter all of the screens went blank. Some sleuthing here on TMC revealed it was likely tied to the 12 volt system somehow. Anyway, I popped off the nosecone and checked the 12V battery from the two poles behind the nosecone (hooray for pre-refresh) - it showed 11.4 volts if I remember correctly. I popped on my 12V charger and the screens immediately popped back up. I let it charge overnight (both on the 12V charger and plugged into the the EVSE) and the error messages did not return. I checked the battery each morning for the next couple of mornings and it was consistently around 12.6V after sitting overnight w/o being driven...lower than I might like, but it seemed ok.
Anyway, I was able to drive it to the service center (no errors) and dropped it off. After a couple of days they indicated they wanted to replace the DC to DC converter (over $3k). The invoice explicitly indicates:
"Reviewed vehicle logs and found the HVIL to be intermittently open. Performed diagnosis of the HVIL circuit and found that the lid switch on the DCDC is intermittently open. Recommend replacement of the DCDC for the second generation retrofit as the first generation are no longer available."
After some additional research on the DC2DC converters here on TMC and elsewhere I see the fuse issue isn't uncommon, but in my case that doesn't sound like the issue (a fuse would be a lot more binary). I also see references to the "lid switch" on the HVJB, but I haven't seen any references to a lid switch on the DC2DC unit so my questions are:
Thanks all and happy new year!
Anyway, m
So a week or so ago, our 2013 P85 threw a slew of errors at home as we went to leave (i.e. Unable to Drive: Voltage supply too low; Electrical system power reduced: Vehicle may shut down unexpectedly; Power reduced: Vehicle systems shutting down; Vehicle may not restart: service is required). Shortly thereafter all of the screens went blank. Some sleuthing here on TMC revealed it was likely tied to the 12 volt system somehow. Anyway, I popped off the nosecone and checked the 12V battery from the two poles behind the nosecone (hooray for pre-refresh) - it showed 11.4 volts if I remember correctly. I popped on my 12V charger and the screens immediately popped back up. I let it charge overnight (both on the 12V charger and plugged into the the EVSE) and the error messages did not return. I checked the battery each morning for the next couple of mornings and it was consistently around 12.6V after sitting overnight w/o being driven...lower than I might like, but it seemed ok.
Anyway, I was able to drive it to the service center (no errors) and dropped it off. After a couple of days they indicated they wanted to replace the DC to DC converter (over $3k). The invoice explicitly indicates:
"Reviewed vehicle logs and found the HVIL to be intermittently open. Performed diagnosis of the HVIL circuit and found that the lid switch on the DCDC is intermittently open. Recommend replacement of the DCDC for the second generation retrofit as the first generation are no longer available."
After some additional research on the DC2DC converters here on TMC and elsewhere I see the fuse issue isn't uncommon, but in my case that doesn't sound like the issue (a fuse would be a lot more binary). I also see references to the "lid switch" on the HVJB, but I haven't seen any references to a lid switch on the DC2DC unit so my questions are:
- Basic Question - Is the "lid switch" referenced here just a simple magnetic reed type switch that is used to detect that the "lid" (i.e. case cover) is actually on/closed/sealed up? (i.e. the "fancy" version of what we've all seen on washing machine and dryer lids for years)?
- Is there a lid switch on the DC to DC Converter? - I haven't seen it listed or referred to in any schematics so I'm just not sure there is one (although it might make sense that there would be)?
- Any other ideas? I have seen at least one tech bulletin referencing the 4 or so connectors that actually connect to the DC to DC converter (hvac, heater, input, etc.) and even a TSB where there is a new harness for those connectors (essentially, sounds like the pins were a bit short in some cars). Maybe someone like @Ingineer will chime in (hint, hint).
Thanks all and happy new year!
Anyway, m