It seems to have changed at some point. My service manual specifically references a two pump setup and a three pump setup. My 20,000 VIN car had two pumps I believe.
Edit: Just pulled up the exploded parts view for the front subframe and it shows 2 pumps.
There are fuses for 3 coolant pumps on 2013 and 2014 Model S. I don't know where they are located though.
You have the service Manual from tesla? How did you get that!! I have a 2013 P85
I've seen one next to the brake master cylinder directly in front of the driver on my car, as well as 2 pumps located near the bottom of the car under the frunk. The leaked diagnostic info in the displays shows two pumps.
I wish Tesla would let us display this on our cars. Would be awesome to see what the car is doing.
...also note that the air suspension compressor lives under the frunk...
Does anyone know exactly where they are on the car/along the system? Maybe the diagnostic screen only shows 2 because 2 of the three work in sync?
Right, but in certain instances it makes sense to have the loops in series. For instance, when the pack is cold, exhaust heat from the DU should be used to send warm coolant into the pack.
I'm pretty sure the DU does not get near warm enough to justify repurposing the heat.