Removing Control Unit For HV Battery

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Control Unit For HV Battery Installation Position

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

WARNING: High voltage at the E-box

Danger of electric shock from live parts
Risk of serious burns or death

→ Work on the HV battery control unit may only be carried out by a high-voltage technician.

→ Always use insulated tools when working on the HV battery control unit.

→ Observe general warning notes for working on the high-voltage vehicle electrical system.

Unscrew the eight fastening screws -1- on the E-box cover and remove it.

Fig 2: Identifying E-Box Cover Screws
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Loosen the two fastening screws -2- on the service disconnector mounting.

Fig 3: Identifying Service Mounting Screws
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Cut tie-wrap -arrow- for the electric line.
Release and unplug the three electric connectors -1, 2, 3- on the HV battery control unit.

Fig 4: Removing Electric Connectors
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew the two fastening screws -3- from the HV battery control unit using the TORX Screwdriver Set VAS 6633 WE 1382 .

Fig 5: Identifying HV Battery Control Unit Screws
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lift up the HV battery control unit and release and unplug the electric connectors -4- and -5- .

Fig 6: Removing Connectors
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lift the HV battery control unit out of the E-box.

Fig 7: Removing Control Unit
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
To replace the control unit, release and unplug the electric connector -6- on the HV battery control unit and remove it together with the HV battery wire harness.