2025-05-01

Power Electronics Module (PEM) - Roadster 2.x - Service Assessment

Correction code 39010800

  • 2025-05-01: Released new procedure.

Inspection

  1. Remove the Power Electronics Module (PEM). See Power Electronics Module (PEM) - Roadster 2.x.
  2. Remove the VOID warranty labels (x2) and patch.
  3. Remove the screws (x14) securing the PEM cover.
  4. Remove the PEM cover.
  5. Attach the ESD ground strap to the PEM ground stud.
  6. Set the multimeter to read Ohms.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    If any of the following voltage readings are not within specification, contact Service Engineering before performing any further voltage checks.
  7. Check reading for B+ to B- bus bar.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B+, Negative lead on B-. Starts low and ramps to ~.715MΩ.
  8. Check right F1 Fuse.
    Informational PurposesAn informational icon, calling your attention
    Note
    Leads on both ends of fuse. Target = 0Ω - 0.2Ω.
  9. Check left F1 Fuse.
    Informational PurposesAn informational icon, calling your attention
    Note
    Leads on both ends of fuse. Target = 0Ω - 0.2Ω.
  10. Check B+ to Motor 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B+ bus bar. Resistance ramps up to high MΩ.
  11. Check B+ to Motor 2.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B+ bus bar. Resistance ramps up to high MΩ.
  12. Check B+ to Motor 3.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B+ bus bar. Resistance ramps up to high MΩ.
  13. Check B- to Motor 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B- bus bar. Resistance ramps up to high MΩ.
  14. Check B- to Motor 2.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B- bus bar. Resistance ramps up to high MΩ.
  15. Check B- to Motor 3.
    Informational PurposesAn informational icon, calling your attention
    Note
    Positive lead on B- bus bar. Resistance ramps up to high MΩ.
  16. Check B+ to heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Negative lead on heatsink screw. Resistance ramps up to very high MΩ.
  17. Check GND reference, PCBA to Heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Target = 0Ω - 0.2Ω. If not, check heatsink screw for proper torque (1.5 Nm).
  18. Check B- to heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Negative lead on heatsink screw. Resistance ramps up to very high MΩ.
  19. Check Motor 1 to heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Negative lead on heatsink screw. Resistance ramps up to very high MΩ.
  20. Check Motor 2 to heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Negative lead on heatsink screw. Resistance ramps up to very high MΩ.
  21. Check Motor 3 to heatsink 1.
    Informational PurposesAn informational icon, calling your attention
    Note
    Negative lead on heatsink screw. Resistance ramps up to very high MΩ.
  22. Install the PEM cover and screws (x14) (torque 1.5 Nm).
  23. Install the PEM. See Power Electronics Module (PEM) - Roadster 2.x.