Tesla Model S GEN1 Rear HVJB
Overview
The Tesla Model S GEN1 Rear HVJB was a High Voltage Junction Box found in the all 2012 through late 2013 Model S. It is centrally located under the rear seat frame, and the Single or Dual GEN1 On-board Charger(s) (OBC) are located to the right and left of it. It was replaced via gradual phase-in by the GEN2 Rear HVJB starting around Oct2013, when the GEN2 On-board Chargers were introduced; the GEN1 & GEN2 Rear HVJBs are not interchangeable, physically nor electrically.
It functions as a junction for connections to these subsystems:
- Traction Battery Pack (HV DC)
- Drive Unit ("Inverter") (rear only, as the Dual Motor option wasn't offered during the GEN1's life)
- Charge Port (AC and DC input)
- DC-DC Converter (GEN1, which also functioned as the Front HVJB)
- On-Board Charger(s) (GEN1 Chargers only)
Connections
HV
All HV connections are well documented by the "Theory of Operation" image below. All are bolted connections.
LV
Depending upon whether Single or Dual OBCs are installed, either (1), or (5), of the LV connectors will not be in use. Extra/unused internal harnessed connectors have "parking" places to stow unused connectors. The various LV connectors are detailed below.
Logic "dummy" connector
This is a panel-mount Molex MX150L Panel-Mount PCB 19428-0001 plug. It has a small PCB soldered to its rear, which contains ONLY (3) 180 ohm resistors, wired in parallel, to provide a net 60 ohm path for the HVIL Loop, on pins 3 & 9. See HVIL section for details on how this connector is used.
HVIL
Errata
GEN1 Rear HVJB Dimensions:
- Weight: nn lbs (nn kg)
Tesla Part Numbers (TPN):
- 1016561