sam-unit-fuse-box.htm¶

2 excerpts.

SAM Unit (Fuse Box)¶

evilution.co.uk/mod/sam-unit-fuse-box.htm · p. 1 · Applies to: 452

Mod Description It's a name that gets banded around especially by Roadster owners but not that many people actually know what it is, even less know what's inside. Mod Details Premium No Difficulty Mod ID 539 Credit Evilution For Link https://evilution.co.uk/mod/sam-unit-fuse-box.htm Copy to Clipboard Many thanks to Dave Guile from Chequered Flag in Strood for donating this part. So What Is The SAM Unit? Essentially it is a fuse box with internal relays and a microprocessor that controls almost all of the electrical functions of the car. The processor is flashable so it can be taught new tricks by way of a TAN code, these tricks include paddle gear shift, auto door locking, automatic gear change, day time running lights, cruise control etc. What Does SAM Stand For? Signal Acquisition & Actuation Module. Where Is It? It can be found at the top of the footwell, passenger side of a RHD smart city coupe/cabrio, drivers side of a LHD smart city coupe/cabrio and the drivers side of a Roadster. What Does It Look Like? Just a plain boring black box with fuses pushed into the front. Although the SAM units all look the same, the new 452 internals are slightly different. What About The Bits We Can’t See? The top side is where most of the wiring goes to, there are 10 connections and a positive input. All inputs are labled. Each circuit has its own earth point around the car. There Is Something Missing Damn right, Relays. Most cars have relays in the fuse box, these control the horn, wipers, indicators, lights etc. The relays visible on the smart are for the fog light and heated seats. How Does That Work Then? No different except in this case the relays are actually inside the SAM unit. Inside The SAM Unit Remove the three Torx10 screws. Unclip all the plastic clips around the outside With the top off you see the main fuse connections With it removed from the box you see the relays and connectors The board is in 4 parts and is bent around on itself, you can see the cracks between the tracks but this is normal. The tracks are OK. PCB 1, 2 and 3 fold open and a flat plastic retainer can be removed PCB 2 is populated with the microprocessor and many small relays This shows the main functions of the relays on PCB 1 This shows the single relay on the back of PCB 3 And there are 2 relays over on PCB 4. What Do The Relays Power? Work in progress Relay Number Part Number SAM Connections Fuses Sends Power To… 1 Tyco V23076-A3001-C132 N11-1 pin 3. N11-5 pin 10 & 12 8, 9, 10 Evap purge valve. Z36 & Z35 2 Fujitsu 51ND10-W1 N11-5 pin 3 Front wiper motor 3 Fujitsu 51ND10-W1 N11-5 pin 2 Rear wiper motor 4 Tyco V23076-A3001-D142 N11-6 pin 2 32 Secondary air injection pump 5 Tyco V23076-A3001-C132 N11-6 pin 1 1 Starter motor 6 Tyco V23076-A3001-C132 N11-4 pin 2 Z24 7 Tyco V23076-A3001-C132 N11-2 pin 2 Rear window and side mirror heater 8 Fujitsu 51ND10-W1 N11-2 pin 6 & 8 Soft top motor(s) 9 Tyco V23072-C1061-A408 N11-3 pin 8 & 9 24, 25 High beam headlights 10 Tyco V23072-C1061-A408 N11-3 pin 6 & 7 22, 23 Low beam headlights 11 Fujitsu 51ND10-W1 N11-5 pin 11 & 12 5, 11, 12, 13, 14, 15, 16 ECU, light switch, speedo, dash buttons, OBD, CD, interior light, fog lights, ESP controller, AC, charge/intercooler, fuel pump. 12 Fujitsu 51ND10-W1 N11-3 pin 10 N11-5 pin 7 & 9 6, 7 Fuel pump, parking lights, boot release, rear lights 13 Tyco V23076-A3001-C132 3, 4 Heater fan, heated seats, power windows. 14 NAIS ACT512 B02 N11-10 pin 4 & 5 31 Central locking 15 NAIS ACT512 B02 N11-10 pin 7 N11-10 pin 6 15 31 Intercooler or Chargecooler Horn 16 Omron G8N-1S N11-10 pin 8 Boot release No User Servicable Parts Inside You can say that again, if you get water in this there is nothing that can be done. There is nothing you can take out or change, everything is soldered directly to the PCBs. What Are The Relays Behind The SAM Unit? Fortwo 450 From left to right: (black, black, yellow) Left side heated seat. Right side heated seat. Fog lights. 452 Roadster Yellow left: Windscreen wipers. Yellow right: Fog lights. Black left: Left heated seat. Black right: Right heated seat. What About Microchips? There are surprisingly few IC packages inside the SAM unit. The main one however is the Motorola MC9S12DG256C which is a 112 pin 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit (HCS12 CPU), 256K bytes of Flash EEPROM and a whole load of other stuff that means very little to me. If you want to know more about this chip. Click here . SAM connections 700cc Fortwo And Roadster N11-1 Wire Colors Connection Fuse 1 Black Yellow/White Black Window switches 4 2 Black Red Heater blower motor 3 3 Black Yellow AirCon connections 8 4 Pink Red Wiper stalk and relay 2 5 Violet Front fog lights 13 6 Red Black ESP controller 14 7 Pink Radio 12 8 Master engine relay 10 N11-2 Wire Colors Connection Fuse 1 Brown Green ECU (MEG unit) 9 2 Black Wing mirror and rear window heater 28 3 Red White Trip PC, OBD, speedo voltage 11 4 Red Green Safety triangle 11 5 Brown Earth 6 Yellow Soft top motor forward 29 7 Blue ECU (MEG unit) 8 Red White Soft top motor reverse 29 N11-3 Wire Colors Connection Fuse 1 Rear window wiper 17 2 Grey Green ESP control unit 18 3 Red Yellow Soft top switch, mirror adjuster switch 19 4 Blue Trip PC, OBD, Speedo voltage 20 5 Blue Yellow Cigarette lighter socket 21 6 Grey Red Low beam 22 7 Blue Green Low beam 23 8 White High beam 24 9 White Blue High beam 25 10 Red Black Fuel pump 16 11 Blue Red Brake light switch 26 12 Red White ECU (MEG unit) 24 N11-4 Wire Colors Connection Fuse 1 Red Black Ignition position 1 2 Red Blue Connector Z24 N11-5 Wire Colors Connection Fuse 1 2 Rear window wiper 17 3 Red Wiper relay 4 5 Brown Earth 6 Red White Light stalk 5 7 Brown White Boot release/window switch 6 8 Red Green Interior lamp 12 9 Brown Yellow/Grey Rear lights 7 10 Green Connector Z36 30 11 Black Pink ECU (MEG unit) 16 12 Yellow Black Connector Z35 10 N11-6 Wire Colors Connection Fuse 1 Blue Starter 1 2 P

Interior lamp¶

evilution.co.uk/mod/sam-unit-fuse-box.htm · p. 2 · Applies to: 452

een Interior lamp 12 9 Brown Yellow/Grey Rear lights 7 10 Green Connector Z36 30 11 Black Pink ECU (MEG unit) 16 12 Yellow Black Connector Z35 10 N11-6 Wire Colors Connection Fuse 1 Blue Starter 1 2 Pink Electric air pump 32 N11-7 Wire Colors Connection Fuse 1 Red White Steering assist control 35 2 Red ESP control unit 34 3 Red Black Ignition main 33 N11-8 Wire Colors Connection Fuse 1 2 Brown White Earth 3 Grey Red Wiper stalk 4 Yellow White Right door switch 5 6 7 8 Yellow Green Crash restraint 9 Pink Red Wiper motor 10 Green Blue Light stalk and trip PC 11 Black Green Cruise control stalk 12 13 Brown Earth 14 White Black Speedo CAN low 15 Brown Red Speedo CAN high 16 Red Steering wheel 17 Yellow Wiper stalk 18 Blue Black Door switch 19 Yellow Red Left door switch 20 Green Boot switch 31 Blue Blower multi-way switch 32 Blue White Soft top strut switch 33 Pink Black Soft top strut switch 34 Grey Handbrake switch 35 White Soft top power switch 36 37 38 Grey Blue Ignition position 2 39 White Black ECU and steering assist CAN low 40 Brown Red ECU and steering assist CAN high N11-9 Wire Colors Connection Fuse 1 Black White Left turn signal 2 Grey Aircon switch position 2 3 White Grey OBD diagnostics 4 Grey Blue Interior lamp 5 6 Pink Fog lamp relay 7 Pink Red Cruise control stalk 8 9 Blue Yellow Auto light switch 10 Green Blue Cruise control stalk 11 Black Green Right turn signal 12 Violet Blue Hazard switch switch 13 Blue Central locking switch 14 Violet LIN Bus to Trip PC & auto light/wiper sensor 15 16 Blue White Wiper relay 17 18 Blue Yellow Auto light switch 19 20 White Key remote receiver 31 Green Aircon switch position 1 32 Black Red Heated rear window switch 33 Yellow Red Light stalk 34 Yellow Light stalk 35 Yellow Green Light stalk 36 Green Blue Wiper stalk 37 Yellow Black Fog lamp switch 38 Blue Light stalk 39 Black Green Light stalk 40 Red Green Wiper stalk N11-10 Wire Colors Connection Fuse 1 Brown Foot well earth 2 White Aircon compressor 3 Brown Green Coolant radiator fan 4 White Blue Door open signal 31 5 Grey Blue Door closed signal 31 6 Blue Red Horn 31 7 Yellow Intercooler fan 15 8 Red Boot open solenoid 31 N11-11 Wire Colors Connection Fuse 1 Red 12 volt from battery Click if info helped 433 likes 333105 views Print