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Figures › Fortwo (451) › EV-specific › EV battery cooling system schematic showing coolant and

EV battery cooling system schematic showing coolant and refrigerant circuits for 451 model without code.

Cooling system diagram with pumps, compressor, condenser, evaporator, and battery heater components labeled.

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Chassis
Fortwo (451) · Electric Drive
System
EV-specific · High-voltage system
Figure type
Schematic
Source
2012 smart fortwo Electric Drive (451) - 3rd Gen Introduction into Service Manual, page 71 Open manual →

Parts referenced

  • A9/6 — Electric refrigerant compressor
  • G5 — High-voltage battery
  • M4/2 — Coolant fan motor
  • M5 — Electric drive motor
  • M43/1 — Coolant pump 1 (feed)
  • M43/3 — Coolant pump 2 (return)
  • M46 — Electric drive and on-board charger coolant pump
  • N83 — On-board charger 3kW
  • N83/10 — On-board charger 22 kW
  • N129/1 — Power electronics control unit
  • R101 — High-voltage battery heater
  • Y133/1 — Drive system coolant pump switchover valve
  • Y133/2 — High-voltage battery coolant pump switchover valve
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← Front axle crossmember and high-voltage battery supportingEV battery cooling system schematic with coolant and →

See all EV-specific figures for the Fortwo (451), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.

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