Hi all, Have been having the issue where the speedo is not sending the speed back to the ecu and hence lowering power steering to high speed setting. I have had this issue a few times which I have re-soldered and fixed. The state of the PCB is not grand at this stage (it was pretty singed when I first opened it, now its a mess). It's getting to the stage that resistors are failing through poor connection which I cannot fix. Replacing all of these is not an issue as you would need to disassemble the speedo which I speak about in one second. So from this I have a few questions/go to's. Can I disassemble the speedometer and have a new PCB made? And if so does anyone know somewhere that I can sort this from. Maybe one someone has used already so they do not require me to send that the PCB. I am under the impression that I cannot do this as removing the needles will render it inaccurate from then on. This leads me onto my second thought, does anyone have a s1 working speedo available that I can buy? PS - For clarification - this is the cause of the issue (I know it will be asked). Power steering is light on startup, so the PSCV is working, speedometer reads accurately. Power steering cuts out after not being at idle for > 10 seconds or whatever it is. Was playing with AC fan vs speed activation, all was fine and after I set this how I wanted it the issue arose again. Which I found a bit weird. I'm assuming the more frequent access to the current speed stressed the fragile system a little more, but if there is an issue here I would be greatly happy. Thanks for your time, Kyle
If your p.c.b has tracks that are in a bad condition and hard to solder to or get a good connection to components and you don't have the expertise to repair the tracks it is normally easy enough and possible to just make up a wire jumper to bridge the damaged track by soldering a suitable size wire between the components were the track is damaged. Also if components have burnt a hole in a p.c.b you can just epoxy up the hole then redrill holes for the new components to mount then use wire jumpers to replace tracks. Not to many printed circuit board are impossible to repair. Components themselves are not very expensive and most can be bought from the likes of jay car. You can even buy a product to relay the tracks. Wires used to jumper tracks don't need to be that thick (just look at the track thickness and width ). Of course if someone had a cheap second hand dash it would be easier. Cheers Dave
Awesome, thanks Dave, when I gain the patience to pull it out again ill give that a go. Might have at it with a multi-meter to see which connections are failing. I might try to make up a diagram for the circuit that transforms the speed signal that is sent to the ecu, which might help others in the future. I have a feeling the issue will lie with the small ROM on the board which may make things difficult. The problem seems to like with tracks pulling up fro board and corroded terminals for capacitors/resistors etc.
Dodgy engineers have been known to bridge breaks in tracks with a stapler. Don't know why Qxxxxs and others still sent their planes to those places for maintenance /repairs after it was exposed.
