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450 SAM Wiring

FQ101 will not be held responsible for any damage incurred as a result of working on your car's wiring systems. This information is for reference only.

The following information has been collected from a 2004 Passion and a 2006 Brabus. Please note that this guide is only applicable for fortwos (450). There are some fundamental differences with the Roadster and fortwo 451 SAM wiring configurations and therefore you should not use this guide if you have either of these cars.

To access the wiring of your SAM follow this guide. The connectors on the back of the SAM are as follows:

Note that connectors 21-30 are not used for N11-8 or N11-9. Details on how to access these are shown at the bottom of this guide.

If you would like a summarised wiring diagram, you can download and print off the following pdf. It may be easier to use this when working in your footwell:

N11-1Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1 1.5
1.5
Black/Yellow
Black/Yellow
4 30 Left electric window
Right electric window
From
2 2.5 Black/Red 3 20 Interior heater fan. Heated seats control modules From
3 1.5
2.5
White/Green
Black/Yellow
8 20 Ignition coils: cylinders 1,2,3 (for petrol engines only)
Glow plug signal (for diesel engines only)
From
From
4 1.5
1.5
Pink/Red
Pink/Red
2 20 Wiper stalk supply
Wiper motor
From
From
5 1.0 Pink/Black 13 15 Front fog lamp supply (constant live) From
6 2.5 Red/Green 14 25 ESP control unit supply (constant live) From
7 2.5 Pink 12 15 Radio supply (constant live) From
8 - - 1 15 Starter motor relay -
N11-2Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1 0.5
0.5
Brown/Green
Yellow/Black
- - MEG (ECU) - Petrol engines only
EDG (ECU) - Diesel engines only
From
From
2 2.5 Black 28 30 Heated rear window, heated wing mirrors From
3 1.5 Red/White 11 7.5 Instrument cluster, key receiver, triangle, OBD Port (constant live) From
4 -

-

11

7.5

-

-
5 4.0 Brown - - Ground for electric soft top relay From
6 4.0 Blue/Red 29 25 Soft top motor (via relay) From
7 0.35 Blue - - MEG (ECU) Gear select system (constant live) From
8 4.0 Black 29 25 Soft top motor (via relay) From
N11-3Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

1.0

Red/Pink 17 15 Rear wiper (only applicable on coupe) From
2 1.5 Grey 18 7.5 Crash system (airbags, seat belts, ECU, ESP) From
3

0.5

Grey/Green

19 7.5

Electric wing mirror switch & supply, electric soft top switch

From

4 1.0

Blue

20

15

Front fog light relay, instrument cluster, radio, heated seat modules, power steering, OBD port, cabrio soft top switch switched live supply.

From
5 1.5 Blue/Yellow 21 15 Cigarette lighter From
6 1.0 Grey/Red 22 7.5 Right headlight (low beam) From
7 1.0 Blue/Green 23 7.5 Left headlight (low beam) From
8 1.0 White/Blue 24 7.5 Right headlight (full beam) From
9

0.5
1.0

White/Blue
White/Blue

25 7.5

Dashboard indicator (full beam)
Left headlight (full beam)

From
From

10 1.5 Red/Black 16 10 Fuel pump, fuel level sensor From
11 1.0 Blue/Red 26 15 Brake lights (via brake switch - constant live) From
12 1.5 Green/White 27 7.5 MEG (ECU) power supply (constant live) From
N11-4Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

4.0

Red/Black - - Ignition switch in position 1 (switched live supply) To
2 4.0 Pink 30 40 Gearshift system From
N11-5Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

-

- - - Not used -
2 1.0
1.0
Green/Black
Green
17 15 Rear wiper (left hand drive - only applicable on coupe)
Rear wiper (right hand drive - only applicable on coupe)
From
From
3

1.5

Black/Blue

2 20 Wiper motor From
4 -

-

-

-

Wiper motor relay signal -
5 1.5 Green/Blue - - Wiper motor park signal to relay To
6 0.75 Red 5 7.5 Indicator, headlight stalk (constant live) From
7 1.0 Brown/White 6 7.5 Boot switch (coupé only), right side lights (front and rear), instrument cluster (lights on signal) From
8 1.5 Red/Green 12 15 Interior lights (switch and rear courtesy - constant live) From
9

0.5
0.75

Brown/Grey
Brown/Grey

7 7.5

Left front side light
Left rear side light

From
10 1.5 Green 9 10 Engine connector (gear shift system) From
11 0.5 Black/Pink 10 15 MEG (ECU petrol) or EDG (ECU diesel) Fuel pump instruction From
12 2.0 Yellow/Black 10 15 MEG (ECU petrol) or EDG (ECU diesel) Engine run signal From
N11-6Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

2.5

Blue 1 25 Starter motor From OK
2 2.5 Pink 32 30 Exhaust CAT preheater From OK
N11-7Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

3.0

Red/White 35 30 EPS - Power steering (constant live) From
2 4.0 Red/Black 34 50 ESP - Traction Control (constant live) From
3 4.0 Red 33 50 Ignition starter switch (constant live) From
N11-8Wire SizeWire ColourFunctionTo/From SAM
1

-

- - -
2 0.5 Pink/Yellow Boot close microswitch From
3

0.5

Grey/Brown Windscreen wiper stalk in intermittent position To
4 0.5 Yellow/Red Right door microswitch (door open) [swap with 19 for LHD/RHD conversion] From
5 0.5 Black/Blue Heater booster switch (for diesels only) From
6 - - - -
7 0.75 Black/Yellow Alternator (applicable to diesels only) To
8 0.5
0.5
Yellow/Green
Yellow/Green
Crash signal two airbags
Crash signal side airbags

From
From

9

-

- - -
10 0.5 Green/Blue Console backlight signal from headlight stalk To
11 0.35 Black/Green Cruise control supply From
12 - - - -
13 - - - -
14 0.35 White/Black CAN interface Low (to ECU and ESP Controller) Both
15 0.35 Brown/Red CAN interface High (to ECU and ESP Controller) Both
16 0.5 Black Steering wheel horn connection (non-paddle wheels only) From
17 - - - -
18 0.5 Blue/Black Central locking system door microswitches From
19 0.5 Yellow/White Left door microswitch (door open) [swap with 4 for LHD/RHD conversion] From
20 0.35
0.5
Yellow
Blue/Red
Coupé interior boot release switch
Cabrio boot switch
From
From
31 0.5 Blue Interior fan in OFF position (to disable aircon) To
32 0.5 Grey/Red Left soft top microswitches From
33 0.5 Yellow Right soft top microswitches From
34 0.5 Blue/White Hand brake indicator switch From
35 0.5 Pink/Blue Cabrio soft top switch From
36 - - - -
37 - - - -
38 0.5 Grey/Blue Ignition switch in position 2 To
39 0.35 Pink/Green CAN interface Low (to instrument cluster) Both
40 0.35 Pink/White CAN interface High (to instrument cluster) Both
N11-9Wire SizeWire ColourFunctionTo/From SAM
1 0.75 Black/White Left indicators From
2 0.35 Grey Aircon first stage from triangle To
3 0.35 White/Grey OBD port pin 1 From
4 0.5 Brown/Blue Interior light (signal from door open) From
5 - - - -
6 0.5 Yellow/Grey Front fog lamp relay ground (from external fog lamp relay) To
7 0.35 Pink/Red Cruise control (from stalk) To
8 - - - -
9 - - - -
10 0.35 Green/White Cruise control (from stalk) To
11 0.75 Black/Green Right indicators From
12 0.35 Violet/Blue Hazard light switch (from triangle) To
13 0.35 Blue Central locking switch (from triangle) To
14 - - - -
15 - - - -
16 - - - -
17 0.5 Green/Black
Red/Green
Washer pump (coupé only)
Washer pump (cabrio only)
Both
Both
18 - - - -
19 - - - -
20 0.5 White Infra red / Radio key receiver data link Both
31 0.35 Green Aircon second stage from triangle To
32 0.35 Black/Red Rear window (and electric wing mirror) heater switch from triangle To
33 0.5 Red/Yellow Rear fog light switch signal from headlight stalk To
34 0.5 Yellow High beam flash signal from headlight stalk (stalk pulled back) To
35 0.5 Violet Low beam signal from headlight stalk (stalk twisted to 2nd position) To
36 - - - -
37 0.35 Yellow/Blue Fog light switch From
38 0.5 Red/White Right indicators from headlight stalk To
39 0.5 Black/Brown Left indicators from headlight stalk To
40 0.5 Black/Green Washer pump signal from wiper stalk (stalk pulled back or pushed forward for rear wiper) Both
N11-10Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1

1.0

Brown

- - Ground From
2 1.5 White - - Aircon compressor From
3 2.5 Brown/Green - - Front radiator fan From
4

1.0

Grey/Blue

31

30

Central locking (doors & fuel cover) Lock/Unlock Both
5 1.0 White/Blue 31 30 Central locking (doors & fuel cover) Lock/Unlock Both
6 1.5 Blue 31 30 Horn From
7 1.5 Yellow 15 15 Intercooler fan From
8 0.5 Blue/Red 31 30 Boot release solenoid From
N11-11Wire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
1 16.0 Red - - Main supply from battery  To
RWire SizeWire ColourFuse No.Fuse RatingFunctionTo/From SAM
R1 1.5 Red/Green 37 15 Sliding Roof From
R2 0.5 Red/Black 36 5 Anti-Theft Alarm System From
R3 - - - - - -
R4 - - - - - -
R5 - - - - - -
R6 0.75 Red 43 15 Anti-Theft Alarm System (constant live) From
R7 1.0 Red 41 15 Anti-Theft Alarm System (constant live) From
R8 2.5 Red/Green 43 25 Cabrio soft top motor (for cars with two motors only) From
R9 1.5
1.5
Black/Red
Black/Red

44

25 Heated seats From

To access the wiring connectors for N11-8 and N11-9, you need to remove the outer casing. Pins 1-20 are attached to a grey connector with Pins 31-40 in a black connector. Each of these are held in the outer case with two white clips indicated below. Use a small screwdriver to push these back whilst pulling the wiring gently.

The connectors should now slide out of the case.

In case you forget which way round the connectors fit into the outer case, each one is labelled with its pin value and a direction arrow. The connectors are slid into the case in the direction of the arrow where they will click back into place.

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