Installing Power Control Unit 48V (PCU 48)

• Position PCU48.
• Connect the coolant line (1) within the vehicle interior and engage.

  The detents must be audibly engage.

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• Position the lines (1) (2) and (3) on the PCU48 (4) correctly as per colors and designations.

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• Tighten the screws (3).
  TIGHTENING TORQUES SPECIFICATION
  
  

  PCU48 screw
  M6 screw	Tightening torque	8 Nm

  • Connect connectors (2) and lock.
  • Tighten nuts (1).
    TIGHTENING TORQUES SPECIFICATION
    
    

    Line to PCU48
    Nut M8	Tightening torque	15 Nm

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  • Clip in the cover (1).

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  • Position the cover (2).
  • Tighten the screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  PCU48 screw
  M6 screw	Tightening torque	8 Nm

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  • Check the sealing rings (1) of the coolant lines (2) for damage and replace if necessary.

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• Connect and lock the coolant hose (4).
• Connect and lock the coolant hose (3).
• Position the coolant flange (2).
• Tighten down screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Coolant flange screw
  Screw M6x20	Tightening torque	8 Nm

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• Position coolant line (2).
• Tighten the screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Screw for coolant line
  M6 screw	Tightening torque	8 Nm

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Follow-up work 

• Install acoustic COVER .
• Install right a-pillar footwell side TRIM PANEL .
• Install front right door sill COVER STRIP
• Install the right footwell TRIM PANEL .
• Reconnect all battery GROUND LEADS .
• FILL AND VENT the low-temperature coolant circuit.
• ACTIVATE the 48 v electrical system.
• ENCODE/PROGRAM control unit(s).