2014-2018 Smart Fortwo and Smart Forfour - Description of Fuses
Vehicle interior fuse and relay module
| No. | A | Description |
|---|---|---|
| 1 | 20 | Rear roof rack electrical connection |
| 2 | - | - |
| 3 | - | - |
| 4 | - | - |
| 5 | 25 | Driver-side SAM control unit |
| 6 | 25 | Driver-side SAM control unit |
| 7 | 25 | Driver-side SAM control unit |
| 8 | 15 | Center SAM control unit
Radio Radio over connector sleeve for terminal 15 R |
| 9 | - | - |
| 10 | 15 | Horn |
| 11 | 5 | Battery sensor and driver-side SAM control unit |
| 12 | 15 | Front cigarette lighter with ashtray illumination |
| 13 | - | - |
| 14 | 20 | Automatic transmission protected through connector sleeve for circuit 30
Diagnostic connector Smart EQ: Fused circuit 30 connector sleeve Diagnostic connector |
| 15 | 15 | Supply for fused circuit 30 connector sleeve |
| 16 | 5 | Motor electronics protected through connector sleeve for circuit 30
Smart EQ: Supply for fused circuit 30 connector sleeve |
| 17 | 15 | Supply protected through connector sleeve for circuit 30 |
| 18 | 10 | Brake lights switch |
| 19 | 5 | Outside mirror adjustment switch |
| 20 | 3 | Transponder coil
Electronic Stability Program control unit and brake light switch Protected through connector sleeve for circuit 30 |
| 21 | 10 | Light functions protected through connector sleeve for circuit 30 |
| 22 | 5 | Steering wheel angle sensor
Dual-clutch transmission control unit |
| 23 | - | - |
| 24 | 15 | Center SAM control unit |
| 25 | 10 | Center SAM control unit |
| 26 | 15 | Center SAM control unit |
| 27 | 20 | Center SAM control unit |
| 28 | 10 | Driver-side SAM control unit |
| 29 | 10 | Driver-side SAM control unit |
| 30 | 15 | Combination switch
Alarm siren Supply for fused circuit 30 connector sleeve (valid for electric vehicle) |
| 31 | 10 | Instrument cluster and additional instruments |
| 32 | - | - |
| 33 | 5 | Supplemental Restraint System control unit |
| 34 | 5 | Combination switch |
| 35 | 5 | Electrical power steering control unit |
| 36 | 5 | Center SAM control unit |
| 37 | 30 | Driver-side SAM control unit |
| 38 | 40 | Air conditioning power supply solenoid switch |
| 39 | 30 | Starter
Through starter relay |
| 40 | Smart EQ: Blower motor | |
| 1/1 | 10 | Smart EQ: Electric vehicle circuit 30 connector sleeve supply |
| 1/2 | - | Smart EQ:
Brake booster vacuum pump control unit Power electronics control unit |
| 1/3 | - | - |
| 1/4 | 20 | Sound system amplifier control unit |
| 1/5 | 5 | Dual clutch transmission control unit
Smart EQ: Electric drive control unit |
| 1/6 | 25 | Left front power window motor and right front power window motor |
| 1/7 | 5 | Left electrically adjustable and heated outside mirror and right electrically adjustable and heated outside mirror |
| 1/8 | 25 | Smart EQ:
Front passenger seat heater control unit Driver seat heater control unit |
| 1/9 | - | - |
| 1/10 | - | Smart EQ: Steering wheel heater relay |
| 2/1 | 20 | Supply for soft top control drive unit |
| 2/2 | 20 | Supply for soft top control drive unit |
| 2/3 | - | - |
| 2/4 | - | - |
| Relay | ||
| K1 | Heated rear window/outside mirrors | |
| K2 | Front power window | |
| K3 | Sliding roof | |
| K4 | Front headlamps | |
| K5 | Starter | |
| K6 | Fanfare horn | |
| K7 | Smart EQ: Steering wheel heater | |
Combustion engine fuse and relay module (F1)
| No. | A | Description |
|---|---|---|
| 1 | 30 | Heated rear window over relay for heated rear window/outside mirrors |
| 2 | 30 | Front passenger seat heater control unit
Driver seat heater control unit Smart EQ: Brake booster vacuum pump control unit |
| 3 | 25 | Supply for Electronic Stability Program control unit |
| 4 | 40 | except Smart EQ: Electrical fuse 1 and electrical fuse 2 |
| 25 | Sliding roof relay | |
| 5 | 60 | Supply for internal combustion engine fuse and relay module |
| 6 | 50 | Dual clutch transmission control unit
Protected through connector sleeve for circuit 30 |
| 40 | Smart EQ: Vehicle interior fuse and relay module supply | |
| 7 | 30 | Fan motor
Over fan relay |
| 30 | Fan solenoid switch
ICE combustion engine cooling |
|
| 8 | - | - |
| 9 | 60 | USA: Secondary air injection pump
Smart EQ: Heater for high-voltage battery Over heater relay for high-voltage battery |
| Relay | ||
| K1 | Fan | |
Battery clamp fuse (F108)
| No. | A | Description |
|---|---|---|
| F1 | 200 | Electrical fuse 3A (F108f3A) and electrical fuse 3B (F108f3B)
Smart EQ: Power supply fuse and relay module (F1) DC/DC converter control unit |
| F2A | 70 | Vehicle interior fuse and relay module supply (F2)
Protected through connector sleeve for circuit 30 Connector sleeve for circuit 30 |
| F2B | 60 | Electrical power steering control unit |
| F3A | 70 | Vehicle interior fuse and relay module supply (F2)
Ignition lock Protected through connector sleeve for circuit 30 Connector sleeve for circuit 30 |
| F3B | 50 | Electronic Stability Program control unit |
Power supply fuse and relay module
| No. | A | Description |
|---|---|---|
| 2 | 15 | Smart EQ:
Transmission mode recognition sensor Electric drive control unit |
| 3 | 20 | Fuel pump with fill level sensor and temperature sensor |
| 40 | Smart EQ: Electric vehicle drive motor fan relay | |
| 4 | 25 | Supply for fused circuit 30 connector sleeve |
| 30 | Smart EQ: Battery cooling system coolant pumps relay | |
| 5 | 15 | Supply for connector sleeves for circuit 87 |
| 15 | Smart EQ: Battery cooling system coolant pump | |
| 6 | 15 | Refrigerant compressor relay |
| 5 | Smart EQ:
Battery management system control unit Electric drive control unit |
|
| 7 | 10 | Fan
Through fan relay |
| 20 | Smart EQ: Power electronics control unit power supply connector sleeve supply | |
| 8 | 10 | Dual clutch transmission control unit |
| 15 | Smart EQ: Circuit 87 supply connector sleeve | |
| Diode | ||
| 1 | except Smart EQ: Internal combustion engine relay module | |
| 2 | USA: Supply for vacuum pump relay | |
| Relay | ||
| K1 | Engine function circuit 87 | |
| K2 | Fan | |
| K3 | Ignition coils/fuel pump actuation | |
| K4 | Smart EQ: Battery cooling system coolant pumps | |