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If your SuperMID isn't getting a signal, then that would point to a problem at the VSS or its connector/cabling feeding to the ECU (Yoshi's installation instructions call for the SuperMID to pick up its signal at the ECU's VSS input cable). But if your MID isn't getting a signal, I don't see how your speedometer could be working. When I have had odo/speedo problems, the MID would work fine even though the odo/speedo was dead. In the past I have had problems with bad solder joints in the odo/speedo cluster and a bad or intermittent signal at the VSS connector in the engine compartment. Coating the VSS connector's pins with silver conductive grease took care of the intermittent VSS problem. Disassembling the odo/speedo cluster (very easy to do) and checking/reheating solder joints and/or coating any internal connector pins with silver conductive grease have taken care or dead/jumping speedometer needles is the past. I have had to do this a number of time on my 92 civic over the years.
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