SMART Fortwo 451 Series Introduction Into Service Manual page 71

Cooling system overview
Cooling system without code (V03) Battery cooling system
Coolant/refrigerant circuit (schematic)
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
(with code (908) 22 kW on-board charger)
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
70 Introduction of smart fortwo electric drive (3rd Generation) • Model Series 451
1 Expansion reservoir
2 Condenser
3 Cooler
4 Evaporator
5 Expansion valve
a Coolant circuit
b Refrigerant circuit
P20.00-2442-00