You are looking for modification and information for the following smart car types. Changing these affect the above menus.

Old Style 600cc For2

Old Style 700cc For2

New Style For2

Roadster

For4

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 451 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 back of the tracks become damaged.



PCB 1, 2 and 3 fold open and a flat plastic retainer can be removed



PCB 4 is populated with the microprocessor and many small relays



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 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

N11-1	Wire Colors	Connection	Fuse
1	Red Grey	Blower Motor	4
2	Red Green	MAF, O2 up, Glow Plug, EGR, Cam Solenoid, Pressure Valve	8
3	Red White	Power Window Control Unit	3
4	N/C	N/C	N/C
5	Red Pink	ESP Control Unit
6	Black Yellow	Alternator	1
7	Red Blue	Radio	15
8
N11-2	Wire Colors	Connection	Fuse
1	Red White	Additional Instruments pin1	12
2	Red Violet	Cockpit Switch Group pin2	28
3	Violet White	ECU pin72
4	Black Blue	Heated Rear Window	28
5	Brown	Earth
6	Red Black	Soft Top Relay Close pin8	29
7	Blue	AMT Control Unit pin17
8	Red Blue	Soft Top Relay Open pin8	29
N11-3	Wire Colors	Connection	Fuse
1	Black Green	Rear Wiper Motor pin2
2	Black Red	Restraint Control And Speedo	18
3	Black Yellow	ECU pin65	19
4	Black Grey	Stereo, Heated Seat Module, Wiper Stalk	20
5	Black Blue	Cigarette lighter socket	21
6	Grey Yellow	Left Low beam	22
7	Grey Violet	Right Low beam	23
8	Red Yellow	Stop Lamp Switch	24
9	White Black	Right High Beam	25
10	White Red	Left High Beam	26
11	Red	ECU pin80	27
12	Red Blue	Diesel Fuel Pump	16
N11-4	Wire Colors	Connection	Fuse
1	Red Black	Ignition position 1
2	Red Blue	AMT Module pin1 and 3	30
N11-5	Wire Colors	Connection	Fuse
1
2
3	Black Blue	Front Wiper Motor pin3
4	Grey Yellow	Front Fog Lights	5
5	Yellow	Front Wiper Motor pin4
6	Green Blue	Rear Wiper Motor pin1	5
7	Grey Green	Right Standing Lamp	6
8	Brown Grey	Left Standing Lamp	7
9	Red Black	Soft Top Relay, Interior Lamp	15
10	Red Yellow	Fuel Injector Power	9
11	Red Grey	Fuel Pump, ECU pin66,73, O2 down, Coil Packs	10
12	Blue Red	CDI Control Module
N11-6	Wire Colors	Connection	Fuse
1	Violet	Starter	1
2
N11-7	Wire Colors	Connection	Fuse
1	Red White	Power Steering Module	35
2	Red Green	ESP Control Unit	34
3	Red	Ignition Main Position 0
N11-8	Wire Colors	Connection	Fuse
1
2	Blue Black	Boot Release Switch
3	Grey Brown	Wiper Stalk pin4
4	Yellow White	Right Door Rotary Switch
5
6
7
8
9	Blue Grey	Front Wiper Motor pin2	2
10	Grey Blue	Light Stalk pin2
11
12	Violet Green	Restricted Info
13
14	Green	CAN Low ECU
15	Green White	CAN High ECU
16
17	Yellow	Wiper Stalk pin5
18	White Green	Left Door Central Locking Switch
19	Yellow Black	Left Door Rotary Switch
20
30	Grey White	Rear Soft Top Microswitch
31	Violet Blue	Cockpit Switches pin12 Hazards
32	Yellow Blue	Soft Top Microswitch
33	Violet White	Roof Cassette Microswitch
34
35	Pink Blue	Soft Top Power Switch
36	Pink Yellow	Boot Handle Switch
37
38	Grey Black	Ignition Position 2
39	Green	CAN Low to Speedo
40	Green White	CAN High to Speedo
N11-9	Wire Colors	Connection	Fuse
1	Black White	Left Headlight Indicator
2	Blue Red	Rear Central Locking Motor	31
3	Grey White	Transponder Coil 2
4	Brown Blue	Front Interior Lamp
5
6	Yellow Grey	Soft Top Relay pin4
7
8	Blue	Cockpit Switches pin13 Tow Sensor
9	Yellow	Light Stalk pin5
10
11	Black Green	Right Headlight Indicator
12	Pink	Cockpit Switches pin10 Central Locking
13	Blue Yellow	Cockpit Switches pin8 Front Foglights
14	Violet Blue	Dash Top Pods
15
16	Black Blue	Cockpit Switches pin11 Unlock
17	Green Blue	Wiper Stalk pin7
18	Yellow Blue	Rear Fog Lamp Relay pin4
19
20	Violet White	Transponder Coil 1
21	Brown Black	Transponder Coil 3
22		Luggage Carrier
23
24	Red Black	Transponder Coil 4
25
26
27
28
29
30	Pink Black	Horn Button
31
32
33	White Black	Heater Air Conditioning Unit
34	Yellow Red	Light Stalk pin
35	Violet Green	Light Stalk pin4
36	Green Red	Wiper Stalk pin1
37	Grey	Cockpit Switches pin9 Rear Fog Light
38	White Red	Light Stalk pin6
39	Black Brown	Light Stalk pin7
40	Red Green	Wiper Stalk pin10
N11-10	Wire Colors	Connection	Fuse
1	Brown	Earth
2	White	Aircon Compressor
3	Red Blue	Coolant Radiator Fan
4	Grey Yellow	Central Locking Door Open	31
5	Pink	Central Locking Door Closed	31
6	Blue	Horn	31
7	Yellow	Intercooler fan	14
8
N11-11	Wire Colors	Connection	Fuse
1		12 Volt SAM Power In	33

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