My trusty old Mitsubitsu Space Star from 2000 or abouts recently ran out of juice because I left the lights on, and after jump-starting it this cold dark morning and driving it a bit to let the computer get re-acquainted with the engine, I noticed my speed indicator stuck at 0.
The car was itself running fine and the day-counter and ODO meter added up the kilometers, which was puzzling. Are they not running off the same sensor?
A quick round of Google showed me what must have happened;  ,  when jump-starting a car, or re-connecting it’s battery, voltage mulst have spiked which sometimes causes the Speedometer needle to go full 360..
And indeed, on closer inspection I could see it was stuck on the other side of the little pin, unable to move any further.
Ready for an afternoon of taking things apart, I was pleasantly surprised at how simple the solution to this issue can be:
- For some cars, probably a bit more advanced than my humble Space Start, one can push down the reset button of the day-counter whilst, after or before inserting and turning the key for up to a full minute. I tried it all, to no avail.
- Mention was made of the display needing to be in ODO-mode for this to work but this does not apply to my car; switching between the A and B counters and repeating the above did not help either.
- In the end, what did reset the Space Star Speedometer was the simplest option on offer; disconnecting the battery (the “-” terminal) for a full five minutes, and then simply re-connecting the system.
After disconnecting the battery I could see the needle had moved back somewhat already and reconnecting it five minutes later, the needle jumped back to 0 and, on a test-drive, indicated as before.
That’s it. No disassembly, no visit to the garage, done in 5 minutes.