Electrical figures — Smart Fortwo (450)

911 electrical illustrations for the Smart Fortwo (450) — schematics, exploded views, and procedure photos drawn from the manuals. Open any figure for its source page, part references, and a copyable link.

Fuse box location diagram showing left-hand dashboard area with pull-down access instructions. 450 Fuse box location and access procedure on left-hand side Fuses & relays · p2 Step-by-step fuse change instructions with photo showing fuse box holder removal and reinsertion. 450 Fuse replacement procedure with safety steps and fuse box Fuses & relays · p3 Fuse box diagram showing 27 labeled fuse positions and removal tool. 450Location callout Fuse box layout with numbered positions 1-27 for smart Fuses & relays · p4 Parking light bulb holder assembly with disconnect procedure illustration for Smart fortwo 450. 450 Parking light bulb replacement procedure showing bulb Lighting · p10 Headlight bulb replacement guide showing rubber cap removal, retaining springs, and bulb socket location. 450Location callout Low/high beam bulb replacement procedure for Smart fortwo Lighting · p11 Instructions and diagrams showing how to change side turn signal lights on Smart car fender. 450Location callout Side turn signal light bulb replacement procedure with 12V Lighting · p12 Taillight bulb change instructions showing fastening screws, apertures, and plug connector removal points. 450Location callout Taillight bulb replacement procedure with component Lighting · p13 Taillight assembly with labeled parts D, E, F showing clips, panel, and bulb holder for replacement. 450Location callout Taillight bulb removal procedure showing casing clips Lighting · p14 Battery removal and installation steps with diagram showing positive terminal B, negative terminal A, and fastening device C. 450Location callout Battery installation and removal procedure with labeled Battery (12V) · p21 Service manual page showing battery (G1) fluid level check and correction steps with warning about hydrogen gas and caustic burns. 450Location callout Battery fluid level inspection and correction procedure for Battery (12V) · p77 Headlamp adjustment guide showing lamp unit photo with adjustment screws E1, E2 and three beam pattern diagrams for right-hand, left-hand, and high beam settings. 450Location callout Headlamp adjustment procedures for Smart fortwo, including Lighting · p86 Service manual page showing headlamp locations on front vehicle diagram and 11-step adjustment checklist. 450Location callout Headlamp adjustment procedure with numbered service steps Lighting · p87 Fog lamp assembly with adjustment screw callout and light-dark boundary adjustment pattern diagram. 450Location callout Fog lamp adjustment procedure with headlamp testing unit Lighting · p89 Service manual page showing radio dimming diode installation steps with vehicle diagrams and labeled connector locations. 450Location callout Radio dimming diode installation procedure for Smart Fortwo Wiring · p90 Service procedure step 11 showing DTC diagnostics, wiring harness repair kit, and three crimper tool options with part numbers. 450 DTC memory diagnosis procedure with wiring harness repair ECU / sensors · p91 Service procedure showing battery ground cable location and removal steps with safety warnings. 450 Battery ground line disconnect/connect procedure for smart Wiring · p95 Battery removal and installation steps with labeled components including cover, clip, positive line, bracket, venting hose, and battery. 450Location callout Battery removal and installation procedure for chassis Battery (12V) · p96 Service procedure showing SAM control unit location with three detail photos and 14-step removal/installation instructions. 450Location callout SAM electrical control unit removal and installation Fuses & relays · p103 Service manual page showing tweeter removal procedure with photographs and numbered callouts for smart fortwo. 450Location callout Remove and install tweeter speakers on chassis 450.3/4 Lighting · p146 Technical reference table listing electronic control module codes and descriptions for Smart fortwo. 450Schematic Control module designation list for Smart fortwo 450/451 ECU / sensors · p172 Smart fortwo diagram showing Bluetooth microphone connector position and interior socket with cable color coding chart. 450 Bluetooth microphone connector X9 and interior socket X58/1 ECU / sensors · p181 Left footwell cable routing diagram with numbered connectors and color-coded wire assignments. 450Wiring diagram Cable and plug connection arrangement for left footwell ECU / sensors · p182 Close-up photo of connector X11/4 in right footwell area with detailed inset image. 450 Electrical connector X11/4 location and assignment at right Wiring · p183 Wiring diagram table showing data link connector pins 4-16 with cable color designations. 450Wiring diagram Data link connector X11/4 pin assignments and cable color ECU / sensors · p184 Wiring diagram showing Z-connector sleeves Z3/17, Z3/44, Z37/2, Z37/3 with component assignments and pin locations. 450Wiring diagram Z-connector sleeve locations and assignments for center Wiring · p185 Diagram showing Z connector sleeves in left footwell with table of designations and components. 450Wiring diagram Z connector sleeve locations and wiring harness assignments ECU / sensors · p188 Diagram showing Z connector sleeve positions Z7/24, Z7/35, Z7/36 on smart fortwo with reference table. 450Schematic Z connector sleeve locations and assignments for wiring Wiring · p189 Four photographs showing connector locations on smart fortwo interior left side with reference diagram below. 450Schematic Interior compartment left side line and plug connector Wiring · p190 Table listing connector codes, designations, and wiring color specifications for vehicle electrical connectors. 450Location callout Connector codes and cable color assignments for seat ECU / sensors · p192 Overhead diagram of smart fortwo showing three connector detail photos pointing to rear vehicle areas. 450Location callout Rear line and plug connector locations on smart fortwo Wiring · p193 Wiring diagram showing connector pin assignments for rear luggage carrier and lamps 450Wiring diagram Right rear luggage carrier and rear lamps connector wiring Lighting · p197 Three detailed underfloor photos with labeled connector locations and a reference diagram of Smart fortwo. 450Schematic Underfloor line and plug connector locations on Smart Wiring · p200 Close-up of door lock mechanism with part number L6/2x1 labeled, isometric car view below. 450Location callout Door lock actuator L6/2x1 location on smart fortwo 450/451 ECU / sensors · p201 CAN bus wiring diagram with numbered callouts connecting multiple vehicle control modules and sensors 450Wiring diagram CAN bus network schematic showing connections between ECU / sensors · p224 Alarm siren component with inclination sensor mounted on vehicle underside, close-up and installed location views. 450 Alarm signal horn H3/2 with inclination sensor for ECU / sensors · p244 Service manual page showing battery ground cable removal and installation procedure with interior and engine bay photos. 450Location callout Battery ground cable disconnect/connect procedure for Smart Wiring · p249 Electrical wiring diagram with repeated relay and switch circuit patterns for vehicle lighting systems. 450Wiring diagram Wiring schematic for Smart Fortwo 450/451 lighting circuits Wiring · p250 Text list of component codes A1 through Z37/5 with technical descriptions for vehicle systems 450Schematic Legend listing component codes and descriptions including ECU / sensors · p251 Two photographs showing fuse/relay box location under hood and SAM control unit component. 450 Fuse and relay box location and SAM control unit Fuses & relays · p262 Fuse box diagram showing relay positions A, B, C with table listing fuel pump and fog light relays. 450 Fuse and relay box relay assignment for SAM control unit Fuses & relays · p263 Fuse box diagram showing fuse positions R1-R9 and electrical connectors N10/10-1 through N10/10-11 with fuse ratings table. 450Location callout SAM control unit fuse and relay box assignment N10/10 front Fuses & relays · p264 Fuse box diagram table listing numbered circuits N10/10f12 through R9 with component descriptions and amperage values. 450Schematic Fuse and relay panel legend for smart fortwo 451, showing Fuses & relays · p265 Fuse block diagram with numbered positions for 999cc engine, switched and constant lines labeled. 450Schematic 999cc fuse block layout diagram showing switched and Fuses & relays · p266 Ground point locations at rear of smart fortwo, showing W6 and W7 connectors with isometric view. 450Location callout Rear end ground point locations W6 and W7 on smart fortwo ECU / sensors · p267 Wiring diagram table showing ground points and electrical components with pin numbers 450Wiring diagram Ground points W6 and W7 in luggage compartment with ECU / sensors · p268 Three detail photos showing ground point locations labeled W9, W30/2, and W14 with isometric vehicle diagram below. 450Schematic Ground point locations W9, W30/2, W14 in left footwell area Wiring · p269 Table listing ground points, component designations, and connector pin assignments for Smart fortwo electrical connections. 450Wiring diagram Ground points W9, W14, W30/2 with component designations ECU / sensors · p270 Right footwell ground points diagram with labeled callouts W26 and W10, isometric car view below. 450Location callout Ground point locations W26 and W10 in right footwell area Wiring · p271 Right rear wheelhouse ground point W117 shown in close-up and vehicle location diagram. 450 Ground point W117 location and assignment at right rear ECU / sensors · p275 Close-up photo of ground point W43 on firewall with car diagram below. 450 Ground point W43 location on left firewall of smart fortwo Wiring · p276 Wiring diagram table showing ground point W43 connections to various electrical components and their pin locations 450Wiring diagram Ground point W43 (outside left fire wall) wiring ECU / sensors · p277 Technical diagram showing restraint control unit location in cockpit and its functional specifications. 450Schematic Restraint systems control unit N2/7 location center cockpit ECU / sensors · p284 SAM control unit documentation with location photos and component list for smart fortwo. 450 SAM control unit location in driver footwell, component Fuses & relays · p287 Text listing electrical components with part codes for Smart Fortwo 451 model lighting and motors. 450 Electrical component designation list for Smart Fortwo 451 ECU / sensors · p288 Wiring color code reference table for left door separation point with regional market indicators. 450 Left door separation point wiring diagram with color code Wiring · p293 Wiring color code table showing door separation connectors A1-C5 with UK/non-UK variants 450Schematic Right door separation point color code and connector Wiring · p294 Wiring diagram showing CAN bus and LIN network connections between vehicle control modules and sensors. 450Wiring diagram Overall network (GVN) function diagram for 451/3/4 showing ECU / sensors · p316 Table listing SAM-connected components via LIN B including sensors, control units, and part numbers. 450Wiring diagram SAM control unit LIN B network component list with part Fuses & relays · p317 Diagram showing GVN component locations on smart fortwo with labeled parts around vehicle exterior. 450Schematic Overall network (GVN) component locations on smart fortwo ECU / sensors · p318 HVAC control unit diagram showing switches, sensors, and air distribution rotary switch locations. 450Schematic Heater/air conditioning operating unit component ECU / sensors · p319 Headlamp assembly diagram with numbered callouts and adjustment lever detail for smart fortwo 451. 450Location callout Model 451.3/4 headlamp adjustment procedure showing left Lighting · p327 Exploded view of headlamp assemblies and adjustment mechanism for Smart Fortwo model 451.374 450Exploded view Smart Fortwo 451 headlamp adjustment procedure showing left Lighting · p328 Fog light beam pattern diagram and photograph of front fog lamp installation on smart fortwo. 450Location callout Front fog light adjustment procedure showing light-dark Lighting · p329 Technical diagram of smart fortwo headlamp adjustment with callout labels and front view photos. 450Location callout Headlamp adjustment procedure for 451 fortwo, showing Lighting · p330 Service manual table with headlamp switching and adjustment instructions for Smart fortwo. 450 Headlamp adjustment and fog lamp procedures for low beams Lighting · p331 Headlight beam adjustment diagram with central alignment mark labeled 6. 450 High beam headlight adjustment procedure showing central Lighting · p332 Headlight beam adjustment diagram showing horizontal division mark, kink line, and light-dark boundary reference points. 450Location callout Low beam headlight adjustment checking procedure with Lighting · p333 Two vehicle front view photos showing fog lamp callout locations with removal/installation procedure table below. 450Location callout Front fog lamp (FFO) removal/installation procedure with Lighting · p338 Multiple views of front module disassembly with numbered callouts for headlamps, connectors, screws and clips on chassis 451. 450Location callout Front module removal and installation steps for smart Lighting · p342 Headlamp removal procedure showing electrical connectors, bolts, and left/right lamp unit locations with numbered callouts. 450Location callout Front headlamp unit removal and installation procedure for Lighting · p379 Service procedure for removing and installing turn signal lamps on Smart Fortwo 451 chassis. 450Location callout Remove/install additional turn signal lamp on 451 fortwo — Lighting · p391 Service manual page showing windshield washer nozzle positions on Smart Fortwo 451 with front and rear views. 450Location callout Windshield washer spray nozzle adjustment procedure for Lighting · p406 Service manual page showing battery maintenance steps with warning symbols and photographic details of battery access. 450Location callout Battery fluid level checking and correction procedure for Battery (12V) · p408 Data link connector location in footwell, labeled X11/4 with inset detail view. 450 Data link connector X11/4 location in driver-side footwell ECU / sensors · p410 Data link connector in driver footwell with inset detail view showing connector location 450 Data link connector X11/4 location on driver-side footwell ECU / sensors · p411 Data link connector mounted in driver footwell, close-up detail view showing connector location. 450 Data link connector X11/4 location in driver-side footwell ECU / sensors · p412 Instrument cluster diagram showing speedometer, warning lamps, and multifunction display with numbered component callouts. 450Schematic Instrument cluster component description and warning lamp Lighting · p421 Diagram showing Smart car cockpit with four detail photos pointing to connector locations and one isometric vehicle view. 450Location callout Cockpit electrical connectors and line locations with Wiring · p422 Table showing connector codes, wiring designations, and cable colors for additional instruments, airbag, fog lamps, and audio components. 450Wiring diagram Connector codes, designations, and cable color wiring ECU / sensors · p423 Rain/light sensor mounted inside windshield below rearview mirror with function diagrams showing dry and wet conditions. 450 Rain/light sensor B38 location on windshield below rearview ECU / sensors · p432 Exploded view of transmitter key with numbered parts and step-by-step battery replacement instructions 450Location callout Transmitter key battery replacement procedure for smart Battery (12V) · p434 Microwave sensor B32 mounted in center console below gear selector control unit, with interior cabin views. 450 B32 microwave sensor location in center console below Fuses & relays · p438 Rain/light sensor location on windshield and operating principle diagrams showing dry and wet conditions. 450 Rain/light sensor B38 component description and function ECU / sensors · p439 STAR DIAGNOSIS plug connection procedure with numbered callouts showing flap release and X11/4 data link connector location. 450 Connect STAR DIAGNOSIS to data link connector and read ECU / sensors · p440 Disassembled rear light grille with foam gasket and installation detail showing mounting legs. 450 Rear light intake grille foam gasket replacement procedure Lighting · p455 Text page describing airbag warning light self-diagnosis results and child seat detection procedures. 450 Airbag indicator light operation and fault diagnosis ECU / sensors · p459 Battery safety and handling instructions with voltage ratings and warning symbols. 450 Battery safety notes, protective measures, specifications Battery (12V) · p461 Battery service instructions showing positive and negative terminals, mounting points, and acid level checking. 450 Battery removal, installation, and maintenance procedures Battery (12V) · p462 Jump starting instructions with diagram showing cable connections between two car batteries. 450 Jump starting procedures and safety precautions for flat Battery (12V) · p463 Battery maintenance diagram showing veni cap, vent locations, electrolyte level, and three photos of battery installation in engine bay. 450 Battery charging procedures, jump-starting sequence, and Battery (12V) · p464 Battery diagrams showing 12V specs for petrol and diesel, with photos of passenger floor battery location and foot rest removal. 450 Smart battery specifications, dimensions, and right-hand Battery (12V) · p465 Service instructions for removing battery from Smart fortwo LHD model with photos of foot rest and battery location. 450 Battery removal procedure for left-hand drive Smart fortwo Battery (12V) · p466 Reference page showing three fuse blade types and amperage color coding chart for smart vehicles. 450Schematic Fuse types, sizes, and amperage color codes for smart Fuses & relays · p502 Fuse replacement instructions with diagrams of front and rear fuse boxes 450 Fuses page showing front and rear fuse box locations Fuses & relays · p503 Fuse assignment chart listing fuse numbers 1-35 plus backup fuses R1-R9 with amperage and wire colors 450Schematic Fuse assignment table for Smart fortwo showing 35 fuses Fuses & relays · p504 Fuse box diagram showing 44 fuse positions arranged in multiple rows, Canadian version. 450Schematic Smart City CDi Canadian fuse layout diagram with numbered Fuses & relays · p505 Fuse box circuit directory table with fuse numbers, descriptions, amperage, and wire colors. 450Location callout Fuse box circuit legend listing 32 fuses with amperage Fuses & relays · p506 Fuse identification table with circuit numbers 33-44, component names, amperage ratings, and wire colors for smart fortwo electrical system. 450 Fuse box circuit assignment table rows 33-44 listing Fuses & relays · p507 Fuse panel layout diagram with 27 numbered fuse slots and OBD II port labeled 450Schematic Smart City Mk6 fuse box layout diagram showing numbered Fuses & relays · p508 Fuse numbering chart showing 27 circuits with amperage ratings and wire colors 450 Fuse box circuit assignments listing amperage and wire Fuses & relays · p509 Fuse box diagram showing positions 1-35 for Smart City Mk7 model. 450Schematic Smart City Mk7 fuse box layout with 35 numbered fuse Fuses & relays · p510 Table listing 34 fuses with amperage ratings and wire colors for smart car electrical circuits. 450 Fuse box circuit breaker assignments and amperage ratings Fuses & relays · p511 Fuse box diagram showing numbered fuse positions 1-35 and legend table with amperage and wire colors. 450Wiring diagram Smart Roadster fuse panel layout with 35 fuses, amperage Fuses & relays · p513 Fuse assignment table showing circuit numbers 13-44 with amperage ratings and wire colors. 450Schematic Fuse box amperage and color legend for smart fortwo Fuses & relays · p514 Photos showing ECU box removal from under dashboard and battery negative wire disconnection steps 450 ECU module replacement and battery negative terminal ECU / sensors · p521 Three photos showing ECU connectors and wiring harness installation in Smart engine bay during diagnostic procedure. 450 Engine control unit connector and wiring harness routing ECU / sensors · p522 FAQ troubleshooting page with questions and answers about dump valves, engine safe mode, waste gate, and ECU remaps. 450 Troubleshooting and FAQ page covering dump valves, safe ECU / sensors · p532 Technical documentation showing circuit board adapter and wiring harness for heated seat retrofit project. 450 Retrofit heated seat proof of concept wiring diagram and Wiring · p551 Wiring diagram showing IDC connectors, relay pinouts, and heated seat relay location on SAM module 450Wiring diagram Triangle wiring diagram and heated seat relay installation Fuses & relays · p552 Heated seat wiring components including relays, fuses, colored cables, and relay pin diagram. 450Wiring diagram Heated seat installation guide showing relay diagram, fuse Wiring · p553 Four views of an inductor coil component showing cylindrical housing, internal windings, and mounting details. 450 Inductor coil component with red cylindrical housing and ECU / sensors · p557 Four photos showing heater resistor pack disassembly, coil inspection, solder bridge repair, and reassembly process. 450 Heater blower resistor pack repair procedure: opening ECU / sensors · p558 Instrument cluster diagram with labeled speedometer, display, and indicator lights for LHD model. 450Location callout Instrument cluster layout for left-hand drive Smart car Lighting · p564 Dashboard instrument cluster diagram with labeled gauges and warning lights for right-hand drive vehicle. 450Location callout Instrument cluster layout for right-hand drive Smart Fortwo Lighting · p565 Owner manual page showing dashboard warning light symbols and their meanings for Smart car safety systems. 450 Dashboard indicator lights for headlight flashers, fog ECU / sensors · p567 Warning lights guide showing battery, oil pressure, preglow, and heater booster indicator symbols and their meanings. 450 Dashboard warning lights reference guide including battery ECU / sensors · p568 Text page describing airbag warning light behavior and turn signal indicator light operation with safety warnings for child restraints. 450 Airbag indicator light operation and turn signal indicator ECU / sensors · p569 Instrument cluster displays showing frost warning at 3°C, service interval information at 500km, and multifunction button location on steering column. 450 Instrument cluster frost warning, service interval display Lighting · p572 Step-by-step photos of removing and replacing a headlight bulb from inside the engine bay via service hatch access. 450 Headlight bulb replacement procedure through service hatch Lighting · p582 Step-by-step headlight bulb replacement with close-up photos of connector and M-clip details. 450 Headlight bulb replacement procedure for Smart Fortwo Lighting · p583

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