451 Petrol & Diesel Fuse Layout No Amp. Colour 1 Engine 25 A Neutral 2 Windscreen wipers 25 A Neutral 3 Window lifter motor, left and right 20 A Yellow 4 Heater blower 25 A Neutral 5 Fog lights, LED DRLs 10 A Red 6 Parking lights right, instrument lights,...
Smartmods
for all your modding needs, recommended by Evilution
Kane Harrison
451 Fortwo Not Selecting Reverse
451 Fortwo 999cc When the 451 fortwo started exhibiting the same problems when selecting reverse, people immediately assumed that smart hadn't learned their lesson and that a faulty brake light switch was to blame as with the previous models. Although it can cause the...
451 Fortwo Rear Bearings
Loosen the wheel bolts, jack the car up and remove the wheel. Use a Torx30 to remove the drum fixing. Release the handbrake and pull the drum from the hub. With the car in reverse the driveshafts are locked. Use a 21mm socket to remove the centre bolt. Remove the...
451 Fortwo SE Drive Pin Out
451 Fortwo Pin Number Wire Colour Connection 1 Red/Grey Charcoal filter shut off 2 Yellow/Red Reverse light 3 Brown/Yellow AMT Control Module Pin 19 4 Blue/Red AMT Control Module Pin 11 Up 5 Brown/White AMT Control Module Pin 20 6 Black/Grey Power 7 No Connection No...
451 Fortwo Speedo Cloning
Cloning The 451 Fortwo Speedo Cloning is a process where you take data from 1 item and copy it to another to make an exact replica. Why Would I Need To Do That? If your speedo has failed completely, has a hardware or PCB fault, you need to fit a new speedo. Can I Just...
451 Fortwo Speedo Pin Out
451 Speedo Pin Out Speedo Pin Wire Colour Connects To Purpose 1 Red/White SAM Unit Plug 2, Pin 1 Fuse 12, Permanent Live 2 Brown Ground Ground 3 Brown Weight sensing system pin 8 CAN Bus Low 4 Brown/Red Weight sensing system pin 17 CAN Bus High 5 Green/White SAM Unit...
451 Fortwo Towing
Where Is The Towing Eye? Open the passenger door and pull back the carpet in the footwell, in the polystyrene footrest block you will see the towing eye. Pull it from the polystyrene block. On the very early smarts it can be found in the left hand boot storage...
451 Fortwo Window Regulator
Take the door panel off and lower the window a little way. Look at the bottom of the door, you'll find opposing Torx 30 bolts. Remove them. Look at the top and you'll see 2x Torx40 bolts that hold the glass to the regulator. Undo them both. Open the door and...
451 Free Cup Holder
Smart will sell you a cup holder for your 451 but to be honest, you don't need it. You get one free, as standard. On the way back from picking up my first 451 in 2007 we stopped at a McDonalds for lunch. The next day, I noticed that the passenger had left her drink...
451 Front Bumper Removal
Removal of the new smart 451 front panel is just as easy as before.
451 Front Frame Removal
The front of the 451 is taken up by a huge plastic frame, here's how to change it
451 Front Wheel Bearings
How to change the wheel bearings on the 451
451 Fuel Filler Flap Removal
Incase your filler flap gets damaged or you want to replace the flap with an aftermarket one.
451 Fuel Filter
451 Petrol Engine None of the petrol engined smart fortwo 451 have a replaceable fuel filter. 999cc petrol non turbo - no replaceable fuel filter 999cc petrol non turbo MHD - no replaceable fuel filter 999cc petrol turbo - no replaceable fuel filter The fuel filter is...
451 Fuel Flap Solenoid
To remove the fuel flap solenoid, you have 2 options. You can take the rear panels off or leave them on. Rear Panels Removed If the panels are off, it makes it easy. Open the filler flap. On the back edge are 2 clips. They are very easy to push in by hand. Lever the...
451 Gear Change Motor Fault
Gear change motor failures are becoming a lot more common now. There are 2 motors. The 1st motor controls gear 1, gear 3 and gear 5. The 2nd motor controls gear 2, gear 4 and reverse. One will generally fail so you'll normally have issues with alternate gears. It's...
451 Gear Change Motor Testing
Bench Testing The 451 Gear Change Motor The 451 has 2 motors so therefore has 2 similar connectors. Motor 1 Pin Wire colour in photo Function 1 Blue Motor 2 White/Red Voltage Input 3 Blue/Green Sensor 2 4 Violet/Yellow Sensor 1 5 Brown/Yellow Earth 6 Violet Motor...
451 Gearbox Controller Pin Out
Right Connector Gearbox Control Unit Wire Colour Connects To Function 1 Red/Blue SAM Plug 4, Pin 20 Fuse 30 2 Brown Earth Ground 3 Red/Blue SAM Plug 4, Pin 20 Fuse 30 4 Brown Earth Ground 5 - - - 6 - - - 7 Red/Grey SAM Plug 1, Pin 2 (diesel) SAM Plug 5, Pin 11...
451 Gearbox Controller Removal
Smart call the gearbox controller is the Sprintshift Module, because marketing nonsense. If you are suffering the 3 bar issue with your 451, there is a possibility it has got wet. Step 1 is to check under the carpet to see if there is any sign of water. Remove the...
451 Gearbox Fluid Change
Fortwo 451 Petrol Non Turbo (Including MHD) The transmission fluid change is similar to that of the older smart fortwo and Roadster. The main difference is the position of the draining hole. It is now on the right bottom side of the transmission housing. The upper...