SMART Fortwo 451 Series Introduction Into Service Manual page 63

SAM control unit
Relays
The following relays for the smart fortwo electric
drive are located on the SAM and in relay holders
on branch-off lines of the wiring harness:
• Fan stage switching changeover relay
(K9/7) (cooling fan stage 1 + 2)
• Circuit 15/30 stationary air conditioner relay
(K16/1) (2 micro-relays on one holder)
• 12 V PTC heater booster relay (K16/5)
• Relay for brake vacuum pump (+) (K109)
• Relay for brake vacuum pump (-) (K109/1)
Relay arrangement
K9/7 Fan stage switching changeover relay
K16/1 Circuit 15/30 stationary air conditioner
relay
K16/5 12 V PTC heater booster relay
62 Introduction of smart fortwo electric drive (3rd Generation) • Model Series 451
K109 Relay for brake vacuum pump (+)
K109/1 Relay for brake vacuum pump (-)
N10/10 SAM control unit
P54.15-3498-00