Smart Fortwo (W451; 2008-2015) fuses and relays

 

In this article, we consider the second-generation Smart Fortwo (W451), produced from 2008 to 2015. Here you will find fuse box diagrams of Smart Fortwo 2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Smart Fortwo 2008-2015


Cigar lighter (power outlet) fuse in the Smart Fortwo is the fuse #21 in the Instrument panel fuse box.


Instrument Panel Fuse Box

Fuse box location

The fuse box is located under the instrument panel (on the left side).The location of the fuses in the passenger compartment: Smart Fortwo (2008-2015)

Fuse box diagram

Instrument panel fuse box diagram: Smart Fortwo (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015)

 

Assignment of the fuses in the Instrument Panel

Description Amp
1 Engine 132.9, 660.9:  Starter
Engine 780.009: Brake booster vacuum pump
25
2 Wiper motor 25
3 Power window convenience feature control unit 20
4 Blower motor 25
5 Left front fog lamp
Right front fog lamp
10
6 Right taillight
Right parking lamp
Left license plate lamp
Right license plate lamp
7.5
7 Left taillight
Left parking light
7.5
8 Engine 132.9:
Secondary air injection pump relay
ME-SFI [ME] control unit
Electronic selector lever module control unit
Automated manual transmission control unit
Cylinder 1 ignition coil
Cylinder 2 ignition coil
Cylinder 3 ignition coil

Engine 660.9:
CDI control unit
Electronic selector lever module control unit
Automated manual transmission control unit

Engine 780.009: High-voltage battery heater

25
9 Engine 132.9:
O2 sensor downstream of CAT
O2 sensor upstream of CAT
Adjustable camshaft timing solenoid
External air shutoff valve
Activated charcoal canister shutoff valve
EGR switchover valve (with engine 132.910)
Tank vent valve
Pressure regulator valve(for engine 132.930)

Engine 780.009: Electric drive and high-voltage charger fan motor

Engine 660.9: CDI control unit

7.5
10 Engine 132.9:
O2 sensor upstream of CAT
Secondary air injection pump switchover valve
Cylinder 1 fuel injection valve
Cylinder 2 fuel injection valve
Cylinder 3 fuel injection valve

Engine 780.009:
Electric drive and high-voltage charger coolant pump
Battery cooling system coolant pump

Engine 660.9:
Hot film mass air flow sensor
O2-sensor upstream of CAT
CDI control unit
Glow output stage
EGR switchover valve

15
11 ESP control unit 25
12 Instrument cluster
Additional instruments
Microwave sensor
Rain sensor / light sensor
Alarm siren with inclination sensor
Left turn signal lamps/brake light relay
Right turn signal lamps/brake light relay
Mirror heater relay
Automated manual transmission control unit
TPM [RDK] control unit
Combination switch
Cockpit switch group
Data link connector
Starter-alternator control unit
STH radio remote control receiver (engine 780.009)
Rear fog light relay
10
13 Spare fuse 15
14 Refrigerant compressor
Charge air fan motor
15
15 Smart radio 9
Smart radio 10
Front interior lamp
Soft top OPEN relay
Soft top CLOSE relay
15
16 Engine 132.9:
Fuel pump with fuel gauge sensor
ME-SFI [ME] control unit

Engine 660.9:
Fuel pump with fuel gauge sensor
CDI control unit

Engine 780.009: Blower motor relay 1

15
17 Rear-end door wiper motor 15
18 Instrument cluster
Yaw rate sensor for lateral and longitudinal acceleration
Seat occupied recognition pressure sensor
Automatic child seat recognition airbag OFF indicator lamp
Restraint systems control unit
ESP control unit
Steering angle sensor
Steering assist control unit
Driver side seat belt buckle restraint systems switch
Front passenger-side seat belt buckle restraint systems switch
10
19 Engine 132.9:
ME-SFI [ME] control unit
Automated manual transmission control unit
Data link connector
TPM [RDK] control unit
Starter-alternator control unit

Engine 780.009:
Data link connector

Engine 660.9:
CDI control unit
Automated manual transmission control unit
Data link connector

7.5
20 Smart radio 9
Smart radio 10
Heater/air conditioning operating unit
Front seat heater (SIH) control unit
Right wiper switch
Outside mirror adjustment switch
Electrically adjustable and heated outside mirrors
Soft top operation
Electronic selector lever module control unit
10
21 Interior socket 15
22 Left low beam 7.5
23 Right low beam 7.5
24 Engine 132.9: Electronic selector lever module control unit

Engine 132.9, 660.9, 780.009:
Rear fog light relay
Stop light switch

15
25 Right high beam 7.5
26 Left high beam 7.5
27 Engine 132.9:  ME-SFI [ME] control unit 7.5
28 Heated rear window 40
29 Soft top OPEN relay
Soft top CLOSE relay
30
30 Engine 132.9, 660.9:  Automated manual transmission control unit

Engine 780.009: High-voltage battery and interior fan motor

40
31 Horn
Right door CL motor
Left front door central locking motor
Rear-end door CL [ZV] motor
Fuel filler flap CL [ZV] motor
Horn switch
20
32 Vacant
33 Ignition/starter switch 50
34 ESP control unit 40
35 Steering assist control unit 30
R1 Engine 132.9, 660.9:  Mirror heater relay 7.5
R2 Engine 132.9:  Stop light switch 7.5
R3 Vacant
R4 Engine 780.009:  Mirror heater relay 7.5
R5 Engine 780.009:
High-voltage charger control unit
External socket communications control unit
7.5
R6 Engine 780.009: EVCM electric vehicle control unit 15
R6 Engine 132.9, 660.9:
Backup lamp relay
Brake light relay
10
R7 as of 2.9.10; engine 132.9: Front interior lamp

Engine 660.9: Front interior lamp

R7 Engine 780.009: EDCM electric motor control unit 10
R8 as of 2.9.10; engine 132.9:  Sound system amplifier

Engine 660.9: Sound system amplifier

20
R8 Engine 780.009:  PDU high-voltage distributor control unit 7.5
R9 Engine 132.9, 660.9:  Front seat heater (SIH) control unit

Engine 780.009: Brake booster vacuum pump control unit

25

Fuses near the battery

Remove floor covering and the cover.Fuses near the battery: Smart Fortwo (2008-2015)

Description Amp
F36 Engine 132.9:  Secondary air injection pump 50
F58 Engine 780.009:  
EDCM electric motor control unit
60
F58 Engine 132.9:
Starter
Alternator
200
F91 SAM control unit 100

Relays

Relays: Smart Fortwo (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015)

# Relays
A Left turn signal/stop lamp relay
High-voltage battery heater booster relay (only ECE vehicles)
B Right turn signal/stop lamp relay
Radiator fan motor relay (only ECE vehicles)
Fuel pump relay
C Mirror heater relay
Rear fog light relay
K57 High-voltage battery heater booster relay
K59 Radiator fan motor relay
K61 Blower motor relay 1
K62 Blower motor relay 2


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