This is only applicable to mk1-6 fortwos as the mk7 has all functions integrated into the SAM unit. If you car has a ZEE unit then you will have this additional engine fuse box.
Location
The engine electrical centre is located under the carpet beneath the left seat.
It is held with 2 10mm nylon nuts to the floorpan and is easily removed. To remove the cover, there are three clips located as follows:
Pull each black clip back whilst pulling the lid upwards.
This reveals the engine fuses and relays.
Fuses and Relays
The functions of the engine fuses and relays are as follows:
| Petrol | ||||
|---|---|---|---|---|
| Location | Component | Colour | Value | Function |
| S1 | Fuse | Blue | 15 | Intercooler fan, aircon compressor magnetic clutch |
| S2 | Fuse | Red | 10 | Fuel pump |
| S3 | Fuse | Blue | 15 | Injectors, MEG |
| S4 | Fuse | Red | 10 | Tank vent valve, oxygen sensor |
| P | Relay | - | - | Electric fuel pump |
| Q | Relay | - | - | Automated manual transmission |
| R | Relay | - | - | Main relay |
| S | Relay | - | - | Intercooler fan |
| T | Relay | - | - | Starter motor |
| U | Relay | - | - | Aircon compressor magnetic clutch relay |
| Diesel | ||||
|---|---|---|---|---|
| Location | Component | Colour | Value | Function |
| S1 | Fuse | Blue | 15 | Intercooler fan, aircon compressor magnetic clutch |
| S2 | Fuse | Red | 10 | Fuel pump |
| S3 | Fuse | Blue | 15 | Injectors, electrical cut off, pressure valve |
| S4 | Fuse | Red | 10 | Glow time control |
| P | Relay | - | - | Electric fuel pump |
| Q | Relay | - | - | Automated manual transmission |
| R | Relay | - | - | Main relay |
| S | Relay | - | - | Intercooler fan |
| T | Relay | - | - | Starter motor |
| U | Relay | - | - | Aircon compressor magnetic clutch relay |
Wiring
The engine electrical centre has three wiring connectors. Each connector incorporates different key-ways which prevents connectors from being pushed back into incorrect sockets.
| H-LS I | Wire Size | Wire Colour | Function |
|---|---|---|---|
| 1 | 1.5 | Black/Pink | Fuel pump relay control (from pin 97 on MEG) |
| 2 | 1.5 | Black/Red | Fuel pump |
| 3 | 2.5 | Red/Blue | Constant Live (from front fuse box) |
| 4 | 2.5 | Red/Blue | Constant Live (from front fuse box) |
| 5 | 0.35 | Blue | Automatic transmission relay control (from pin 111 on MEG) |
| 6 | 2.5 | Black/White | Supply voltage transmission 1 (to pin 117 on MEG) |
| 7 | 2.5 | Blue/Pink | Supply voltage transmission 2 (to pin 115 on MEG and SE drive) |
| H-LS II | Wire Size | Wire Colour | Function |
| 1 | 1.0 | Green | Charcoal shut off valve (not on petrol engines) |
| 2 | 0.35 | Yellow/White | Intercooler fan relay control (from pin 105 on MEG) |
| 3 | 0.35 | Green/Blue | Aircon compressor relay (from pin 113 on MEG) |
| 4 | 2.5 | Red/Green | Switched live signal from front fuse box |
| 5 | 0.35 | Yellow | Starter relay control (from pin 112 on MEG) |
| 6 | 2.5 | Red | Constant live from battery |
| 7 | 0.5 | Brown | Ground |
| 8 | 1.5 | Black/Yellow | Power supply to MEG (pin 119 on MEG) |
| M-LS | Wire Size | Wire Colour | Function |
| 1 | 2.5 | 3x White | Ignition coil packs |
| 2 | 1.5 | Red & 2x Blue | Fuel injectors |
| 3 | 1.5 | Blue | Aircon compressor |
| 4 | - | - | - |
| 5 | 2.5 | Blue | Engine starter motor (relay in motor) |
| 6 | 1.5 | Yellow | Intercooler fan |
| 7 | 1.5 | White | Lambda Sensor Heaters & Cycle Valve |
