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Home >> VinFast >> 2023 >> VF9 Plus >> Repair and Diagnosis >> Electrical >> Charging Systems >> Bolt On Body Components >> Repair Procedures >> Power Distribution Unit (PDU) Cradle Removal And Installation/Replacement

Power Distribution Unit (PDU) Cradle Removal And Installation/Replacement

Mobile Repair Possible:  No

Special Tools Required: 

Hose Spring Clamp Removal Tool - 51012018 (or equivalent)

Vacuum and Fill Machine - 81392152473

Fig 1: Ring Pull
G16023145Courtesy of VINFAST, LLC

In some Service Instructions, the coolant hoses are shown with a ring pull (1). 

This ring pull (1) is only present on a new hose and must be removed after the coolant hose has been installed. 

The coolant hoses installed in the vehicle have only spring band clamps (2). 

Overview: 

Fig 2: Power Distribution Unit (PDU) Cradle Components Location
G16023146Courtesy of VINFAST, LLC
WARNING: Electricity hazard 
Failure to follow specified procedures may result in death or serious injury from electric shock when working on or near high-voltage components.
  • Only authorised and appropriately trained persons may carry out work on high-voltage vehicles and components.
  • Perform High Voltage isolation procedure prior to commencing work.
  • Ensure appropriate Personal Protective Equipment is worn until the system is verified safe.
WARNING: Hot surface 
Failure to follow specified procedures may result in severe injuries due to burns or scalds.
  • Do not commence work until components/liquids have sufficiently cooled down.
  • Always use personal protective equipment (PPE).
NOTE: Contamination 
Contamination or moisture entering the cooling system can lead to malfunction or functional failure.
  • The vehicle cooling system and any removed components should be capped/sealed during work to prevent contamination entry.

Removal Procedure: 

  1. Disable HV-system. Refer to VEHICLE HIGH VOLTAGE ISOLATION AND ENABLING PROCEDURE
  2. Remove 12V battery tray. Refer to 12V BATTERY TRAY REMOVAL AND INSTALLATION/REPLACEMENT 
  3. Remove air inlet grille panel and extension. Refer to AIR INLET GRILLE PANEL AND EXTENSION REMOVAL AND INSTALLATION/REPLACEMENT
  4. Drain the cooling system. Refer to COOLING SYSTEM DRAINING AND FILLING (HV BATTERY AND EMOTOR)
  5. Remove the eMotor water pump. Refer to EMOTOR WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  6. Remove the HV battery water pump. Refer to HV BATTERY WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  7. Remove the SFC water pump. Refer to SUPER FAST CHARGE (SFC) WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  8. For US/CA Market: Remove the PDU EMI filter. Refer to PDU EMI FILTER REMOVAL AND INSTALLATION/REPLACEMENT (US/CA)
  9. Remove both front side upper tie bars. Refer to FRONT SIDE UPPER TIE BAR REMOVAL AND INSTALLATION/REPLACEMENT 
  10. Remove the battery positive cable junction block. Refer to BATTERY POSITIVE CABLE JUNCTION BLOCK REMOVAL AND INSTALLATION/REPLACEMENT
  11. Remove the shock tower brace. Refer to SHOCK TOWER BRACE REMOVAL AND INSTALLATION/REPLACEMENT 
    G16023147Courtesy of VINFAST, LLC
  12. Remove 2 nuts (1).

    Torque: 5 Nm 

  13. Guide the engine fusebox (2) out of the cradle in the direction of the arrow.
    G16023148Courtesy of VINFAST, LLC
  14. Loosen the 2 coolant hoses (1) with spring band hose clamp pliers and pull them off the respective connections.
    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.
    G16023149Courtesy of VINFAST, LLC
  15. Unlock and disconnect the 2 electrical connectors (1) off the vehicle control unit.
  16. Remove 4 bolts (2).

    Torque: 8 Nm 

  17. Remove the bracket for the vehicle control unit (3) with the control unit still mounted.
  18. Unlock and disconnect 2 electrical HV connectors (1). To do this, unlock the connector (a) in the direction of arrow using a suitable tool and pull the tab of the electrical connector upwards.
  19. Unlock and disconnect 3 electrical HV connectors (2).
    G16023150Courtesy of VINFAST, LLC
  20. Disconnect the positive cable (1) for the PDU by removing the rubber sheath from the cable in the direction of the arrow and loosening the bolt (2).

    Torque: 6 Nm 

  21. Unlock and disconnect the electrical HV connector (1). To do this, unlock the connector (a) in the direction of the arrow and disconnect the plug connection.
  22. Unlock and disconnect 4 electrical HV connectors (2).
  23. Unlock and disconnect the electrical connector (1).
    G16023151Courtesy of VINFAST, LLC
  24. Remove both nuts (1) attaching the condenser (2) to the cradle.

    Torque: 8 Nm 

  25. Remove the A/C condenser (2) off the threaded bolts in the direction of the arrow.
  26. Remove 5 bolts (1).

    Torque: 8 Nm 

  27. Remove the cross member for HV heater.
  28. Pull the heater hose triple clips (1) upwards out of the holders (2).
  29. Push the hose assembly with brackets slightly to the side and remove the two bolts (3).

    Torque: 8 Nm 

  30. Remove both nuts.

    Torque: 8 Nm 

  31. Remove the 2 cables (2) from the PDU bracket and set them aside.
  32. Remove bolt (1) on both sides of the vehicle.

    Torque: 75 Nm 

  33. Remove bolt (2) on both sides of the vehicle.

    Torque: 29 Nm 

    G16023152Courtesy of VINFAST, LLC
  34. Remove 3 bolts (1) on both sides of the vehicle.

    Torque: 29.5 Nm 

  35. Remove bolt (2).

    Torque: 28 Nm 

  36. Remove bolt (3).

    Torque: 6 Nm 

    G16023153Courtesy of VINFAST, LLC
  37. Remove nut (1).

    Torque: 8 Nm 

  38. Pull the ground wire (2) off the threaded bolt and hang it to the side.
  39. Remove 2 nuts (1)

    Torque: 8 Nm 

  40. Remove the nut (1).

    Torque: 8 Nm 

  41. Pull off the bracket for coolant hoses (2) downwards off the threaded bolt and hang to the side.
    G16023154Courtesy of VINFAST, LLC
  42. With the help of a second mechanic, lift the PDU cradle out of the engine bay (1) and then swing it upwards at the front in the direction of the arrow.
  43. Remove the PDU cradle (2) with attachments.

Replacement Procedure: 

  1. Rebuild power distribution unit (PDU). Refer to POWER DISTRIBUTION UNIT (PDU) REMOVAL AND INSTALLATION/REPLACEMENT
    G16023155Courtesy of VINFAST, LLC
  2. Remove nut (1).

    Torque: 8 Nm 

  3. Rebuild the grounding cable (2) for the PDU cradle.

Installation Procedure: 

G16023156Courtesy of VINFAST, LLC

Installation note: Use the spring band hose clamp pliers to push the hose on. If replacing with a new hose, you will remove the ring pull (1) to release the clamp. Refer to  Fig 1 

Make sure that the spring band clamp is aligned inside the marking on the hose  . Refer to HOSE CLAMP REMOVAL AND INSTALLATION/REPLACEMENT GUIDELINES -- SPRING TYPE

  1. Installation is the reverse of removal procedure, noting the following.

    All fasteners must be tightened to torque specification! 

  2. Install the shock tower brace. Refer to SHOCK TOWER BRACE REMOVAL AND INSTALLATION/REPLACEMENT 
  3. Install the battery positive cable junction block. Refer to BATTERY POSITIVE CABLE JUNCTION BLOCK REMOVAL AND INSTALLATION/REPLACEMENT
  4. Install both front side upper tie bars. Refer to FRONT SIDE UPPER TIE BAR REMOVAL AND INSTALLATION/REPLACEMENT 
  5. For US/CA Market: Install the PDU EMI filter. Refer to PDU EMI FILTER REMOVAL AND INSTALLATION/REPLACEMENT (US/CA)
  6. Install the SFC water pump. Refer to SUPER FAST CHARGE (SFC) WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  7. Install the eMotor water pump. Refer to EMOTOR WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  8. Install the HV battery water pump. Refer to HV BATTERY WATER PUMP REMOVAL AND INSTALLATION/REPLACEMENT
  9. Fill the cooling system. Refer to COOLING SYSTEM DRAINING AND FILLING (HV BATTERY AND EMOTOR)
  10. Install air inlet grille panel and extension. Refer to AIR INLET GRILLE PANEL AND EXTENSION REMOVAL AND INSTALLATION/REPLACEMENT
  11. Install 12V battery tray. Refer to 12V BATTERY TRAY REMOVAL AND INSTALLATION/REPLACEMENT 
  12. Enable HV-system. Refer to VEHICLE HIGH VOLTAGE ISOLATION AND ENABLING PROCEDURE
  13. Diagnostics, Programming and Setup. Refer to DIAGNOSTICS, PROGRAMMING AND SETUP USING IDS IN SERVICE
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