Thread: SLS CODE 01-08 NANOCOM

Hi, nanocom is not always 100% accurate with SLABS related fault codes and that code is not logical for the non running compressor symptom cos it's about a microrelay within the ECU for a valve activation, too bad it's not mentiind which one. As long as you hear the compressor relay clicking when you want to inflate via nanocom the problem is not with the ECU but with the power circuit on the relay's contact path. Do you have 12V against body in one of the perpendicular cavities in the fusebox where the relay goes?... if yes the problem is somewhere between the relay and the compressor's plug or the pump is dead.

So going by the massive amount of replies..., traced the issue back to an earth fault as i found the fuel pump was also not working only getting 6.6v at the plug.
After tapping a 12v supply from the rear cigar lighter socket direct to the pump plug some of the dash lights disappeared but I still got the SLS height light coming on sitting in the vehicle and closing the door, for some reason it would never come on when shutting the door from outside...

With things pointing to an earth fault, disconnected the tapped power supply and put a direct earth to one of the rear luggage hold down lugs, swiched on the ignition and automatically got full battery voltage at the plug.

So, back to the engine bay to start poking around, long story short after removing the header tank, relay unit and spotlight wiring tucked between the board and battery box, the very bottom earth terminal from the battery lead was loose along with the relay box earth which definitely could have been a little tighter but not slopping around.
So a little reshuffling of all the earths bolted to the 3 terminals to even the loads a little and all the lights disappeared from the dash, SLS works and with a now running fuel pump, way more grins from the right foot.
With a full scan on Nanocom4 and a backup scan using T4 all codes cleared across all ECU's

Ive left the extra earth point tapped into the fuel pump plug, this picked the voltage up from 13.8 to 14.1v while running and gave a very noticeable jump in pump speed so more voltage = less current and hopefully longer pump life.

So, tap that extra earth point at the pump. there are a couple of unused studs above the rear resonator that are perfect placement.

Ive been trying to work this out for well over a year and all along it was just a dodgy earth...