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600cc Secondary Fuse Box

Mod Details
PremiumNo Difficulty Mod ID1563 Creditevilution For450 Fortwo Linkhttps://www.evilution.co.uk/mod/600cc-secondary-fuse-box.htm Copy to Clipboard
Secondary Fuse Box



The 600cc smart fortwo (1998 to 2002) (or city-coupe and city-cabrio as it was called back then) had a ZEE unit under the dash instead of the SAM unit as found on the 700cc fortwo. The ZEE unit didn't have many fuses or relays so smart added an extra fuse and relay box underneath the nearside seat, under the carpet. It was power and switching for parts of the engine and transmission. Because it controls power to the transmission, it's one of the reasons you could be experiencing the 3 bar transmission fault.



You don't have to remove the seat but it does make things easier.

You can push the seat forward and work between the gap in the carpet.







You'll see a long thin black box with 3 connectors.







Held each end with a 10mm plastic nut.







The relays and fuses are protected by a cover…







…which is held in place with 3 clips.







Lever the clips away and remove the top to reveal the relays and fuses.







The lid contains numbers and letters that probably mean something to smart.





Relays & Fuses


Petrol

 
Relay Number Function
K1 Fuel Pump
K2 Auto transmission
K3 Main Relay (powers F3, F4, K3)
K4 Intercooler fan
K5 Starter Relay
K6 A/C Compressor

Fuse Number Function Rating
F1 Intercooler, AC magnetic clutch 15 Amps
F2 Fuel pump 10 Amps
F3 ECU, Injectors 15 Amps
F4 Tank vent valve, Lambda sensor 10 Amps

Diesel

Relay Number Function
K1 Fuel Pump
K2 Auto transmission
K3 Main Relay (powers F3, F4, K3)
K4 Intercooler fan
K5 Starter Relay
K6 A/C Compressor

 

Fuse Number Function Rating
F1 Intercooler, AC magnetic clutch 15 Amps
F2 Fuel pump 10 Amps
F3 ECU, Electrical Cut off, Pressure Valve 15 Amps
F4 Glow plug timing control 10 Amps